🔬 CPT 65730 — Keratoplasty (Corneal Transplant); Penetrating (Except in Aphakia or Pseudophakia)

Quick Reference

wRVU: ~18.80 (verify CMS MPFS CY2026 Addendum B; CY2025 base was 19.28; −2.5% efficiency adjustment applied) | Global Period: 090 (90 days) | Assistant Payable: ✅ Yes | Bilateral Indicator: 1 Rule: The 90-day global period is among the longest in ophthalmology, bundling all routine post-transplant care from suture checks through final vision stability; any visit within the 90-day window for graft-related management is non-separately billable without a compliant modifier. Bilateral indicator 1 means standard CMS bilateral rules apply — 150% of the allowable when the rare same-session bilateral PKP is billed, with 100% for the first eye and 50% for the second. The critical code selection rule for this entire PKP family is lens status at the time of surgery: 65730 is used only when the patient is phakic (natural crystalline lens in situ), 65750 when aphakic (no lens), and 65755 when pseudophakic (IOL in place); the operative note must explicitly document lens status.

📋 Clinical Description

CPT 65730 describes full-thickness penetrating keratoplasty (PKP) performed in a phakic patient — one who retains a natural crystalline lens. The surgeon uses a circular trephine to excise the full-thickness diseased host cornea, then places a donor corneal button of equal or slightly larger diameter and secures it to the host rim with interrupted 10-0 nylon sutures, a continuous running suture, or a combined technique, restoring all five corneal layers: epithelium, Bowman’s layer, stroma, Descemet’s membrane, and endothelium. This code is distinguished from its sibling codes entirely by lens status: 65750 applies when the eye is aphakic (no natural lens, no IOL), and 65755 applies when the eye contains an intraocular lens (pseudophakic); if a concurrent cataract extraction is performed at the same session as the corneal transplant, the appropriate combination code or separately reportable cataract code must be evaluated and lens status post-operatively determines future PKP re-coding. 65710 (anterior lamellar keratoplasty) captures partial-thickness procedures that spare the host endothelium and is not interchangeable with 65730 regardless of the extent of stromal removal.

Penetrating keratoplasty for H18.621 (keratoconus, unstable) is among the most common indications; the disease produces progressive ectasia and corneal thinning that eventually prevents contact lens tolerance or functional spectacle correction, at which point full-thickness replacement is necessary. H18.511 (‘endothelial corneal dystrophy, Fuchs’) drives PKP when endothelial decompensation produces bullous keratopathy, stromal edema, and intractable glare or vision loss — though Descemet membrane endothelial keratoplasty (65756) has largely displaced PKP for pure endothelial disease, meaning a claim pairing 65730 with a Fuchs’ diagnosis should carry clear documentation supporting full-thickness replacement rather than endothelial-only surgery. The procedure carries a 90-day global period, the longest standard global period in the CMS system, reflecting the extended post-operative management including serial suture adjustments, topical immunosuppression, and graft surveillance.

This procedure may be performed in the following clinical contexts:

Advanced keratoconus with contact lens intolerance — The patient can no longer achieve functional vision with contact lenses due to corneal thinning, scarring, or steep irregular astigmatism; PKP restores a regular refracting surface and is typically performed after corneal collagen cross-linking has failed to halt progression or is no longer feasible due to inadequate stromal thickness.
Corneal scarring from infection or trauma — Stromal opacity secondary to prior herpes simplex keratitis (H17.11, central corneal opacity, right eye), bacterial keratitis, or penetrating injury reduces visual acuity to a level requiring transplantation; documentation must specify the etiology because both the corneal scar code and the underlying cause code (e.g., sequela of herpes keratitis) support medical necessity.
Corneal dystrophy with full-thickness involvement — Stromal dystrophies such as lattice (H18.541) or granular (H18.531) that have produced dense central opacification requiring full-thickness replacement rather than lamellar keratectomy; the choice between 65730 and 65710 hinges on whether the posterior stroma and Descemet’s membrane are structurally competent.
Bullous keratopathy in a phakic eye — Bullous keratopathy (H18.11 right eye) resulting from prior intraocular surgery, chronic elevated IOP, or advanced Fuchs’ dystrophy in a phakic eye who declines or is not a candidate for IOL extraction; if the surgeon simultaneously removes the crystalline lens, the claim transitions to 65755 (pseudophakic) post-operatively and the concurrent lens removal code must be evaluated.
Failed prior corneal transplant — Graft failure (T86.8411 right eye) documented by endothelial cell count below functional threshold, graft edema, or irreversible rejection episode; repeat PKP for a failed graft in a phakic eye is still billed as 65730 with documentation of the prior graft status and current lens status; modifier −58 (staged procedure) may apply if the re-graft is planned within the global period of a prior eye procedure.

🔬 Anatomical & Procedural Considerations

Technique Variant	Mechanism and Steps	Key Notes
Standard Interrupted Suture (Phaco-PKP Not Performed)	A donor corneal button is prepared on the back table from an eye bank–supplied whole globe or pre-cut donor tissue; the host trephine size (typically 7.5–8.5 mm) is selected based on pre-operative corneal topography; the host button is excised, the anterior chamber is entered, and the donor button is placed and secured with 16 interrupted 10-0 nylon sutures.	Suture technique choice (interrupted vs. running) directly affects post-operative astigmatism management and future suture removal timing; interrupted sutures allow selective removal to reduce astigmatism and are preferred for keratoconus; the operative note must document the suture technique, donor tissue source, donor trephine size, host trephine size, and phakic status to support 65730 over 65755.
Combined Running + Interrupted Suture (Antitorque)	After the donor button is seated, a combination of a 12-bite running suture and interrupted sutures is placed in an antitorque configuration to distribute tension; this technique reduces early post-operative cylinder and is preferred when irregular astigmatism from keratoconus is the primary indication.	The operative note documenting “combined suture technique” or “antitorque closure” does not change the CPT code — the procedure is still 65730 regardless of suture pattern; from a coding standpoint, the only feature that changes code selection within the PKP family is lens status, not suture technique or graft diameter.
Repeat PKP (Re-Graft) for Failed Primary Graft	The failed graft is trephined out, the host rim is prepared, and a new donor button is sutured in place using the same techniques as a primary graft; the anterior chamber and existing iris and lens anatomy are assessed intraoperatively; if the natural lens remains in situ, 65730 applies for the re-graft.	The primary diagnosis is the failure or rejection code (T86.841x); if the re-graft is performed within the global period of a prior ophthalmologic procedure (e.g., the original PKP), modifier −58 is required on the new claim with documentation establishing this was a staged or anticipated re-intervention; modifier −78 would apply if the re-graft is due to an acute complication (graft dehiscence, wound failure) rather than a planned staged return.

Clinical Pearl

The single most common audit finding on 65730 claims is lens status mismatch — specifically, billing 65730 when the operative note documents an IOL in the eye (which requires 65755). Before billing, the coder must verify that the operative report explicitly states the lens is natural and in place; if the note says “pseudophakic” or documents any prior cataract surgery in that eye, the correct code is 65755, and the work RVU difference is clinically meaningful. A secondary audit risk is the absence of eye bank tissue documentation: CMS and most payers require that HCPCS code V2785 (Processing, preserving and transporting corneal tissue) be reported alongside 65730 to separately identify the cost of the donor tissue; V2785 is a facility-level supply code reportable by the ASC or hospital and is not separately billable by the surgeon, but its absence from the facility claim may trigger a technical denial.

✅ Procedure Includes

Pre-operative corneal measurements, topography, and slit lamp examination performed on the same date as or immediately preceding the surgical session as part of the pre-procedure assessment bundled into the global payment.
Surgeon’s pre-operative assessment and examination of the operative eye on the day of surgery; separately reportable only with modifier −25 on a distinct E/M code when a separately identifiable, medically necessary evaluation beyond pre-procedure assessment is documented.
General anesthesia or monitored anesthesia care (MAC) / IV sedation administered by the surgeon or a non-physician anesthesia provider; anesthesia reported separately under the appropriate anesthesia code (00144 or 00145 by the anesthesia provider — not bundled into the surgeon’s 65730 claim).
All intraoperative steps of the trephination, corneal excision, donor button preparation, and full-thickness graft placement, including anterior chamber reformation and wound closure with any suture configuration.
Immediate post-operative wound assessment, application of topical antibiotics and steroids, and eye shield placement performed at the conclusion of the procedure.
All routine post-operative evaluation and management visits for graft-related care within the 90-day global period, including suture adjustment or selective suture removal to manage astigmatism, topical medication management, and serial graft surveillance slit lamp examinations.
Documentation of donor tissue source, eye bank tissue designation, trephine sizes, suture technique, and intraoperative findings as required by ASC and hospital facility records.

❌ Excludes / Do Not Report Together

Code	Description	Relationship to 65730
65750	Keratoplasty (corneal transplant); penetrating (in aphakia)	Mutually exclusive with 65730 — the sole differentiating factor is lens status. Report 65750 when the operative eye has no crystalline lens AND no IOL (aphakia); report 65730 when the native lens is in situ. If the coder cannot determine lens status from the operative note, a documentation query is required before billing either code — do not default to 65730.
65755	Keratoplasty (corneal transplant); penetrating (in pseudophakia)	Mutually exclusive with 65730; report 65755 when the operative eye contains an IOL regardless of when cataract surgery was originally performed. If the surgeon simultaneously performs cataract extraction with IOL implantation and PKP in the same session, the encounter is coded 65755 (post-IOL lens status governs) plus the separate cataract extraction code, not 65730; CMS has acknowledged combined PKP-cataract scenarios warrant careful sequencing documentation.
65710	Keratoplasty (corneal transplant); anterior lamellar	Not reportable with 65730 for the same eye in the same session; 65710 captures partial-thickness procedures preserving the host endothelium (deep anterior lamellar keratoplasty, DALK), while 65730 replaces the full corneal thickness. If the surgeon attempts DALK and converts intraoperatively to PKP, only 65730 is reported; the conversion should be documented in the operative note explaining the reason for the change in technique.
65756	Keratoplasty (corneal transplant); endothelial	Not reportable with 65730 for the same eye same session; 65756 captures posterior lamellar procedures such as DSEK/DSAEK/DMEK where only the diseased endothelium and Descemet’s membrane are replaced. Selecting 65730 for an endothelial keratoplasty constitutes upcoding; documentation must confirm full-thickness corneal excision was performed.
E/M codes (992xx / 920xx)	Office visit, any level	Separately reportable only when modifier −25 is appended to the E/M code, documenting a significant, separately identifiable E/M service on the same date that goes beyond the routine pre-procedure assessment; the threshold is high — a new complaint, an acute finding requiring a separate clinical decision, or an examination of a different body system are examples of qualifying circumstances.

Bundling Alert — Global Period Is 090 (90 Days)

The 90-day global period for 65730 is one of the longest in the CMS fee schedule and bundles all routine PKP-related post-operative visits from the day after surgery through day 90 into a single surgical payment. Billing a separate E/M or evaluation code for graft surveillance, suture management, topical drop changes, or wound checks within this window without a compliant modifier generates an overpayment, and the most common audit finding is billing post-operative visits without tracking the global end date. Modifier −24 (unrelated E/M during global period) applies to E/M visits for conditions entirely unrelated to the corneal transplant — e.g., the patient presents within 60 days post-PKP for an acute upper respiratory complaint or retinal detachment in the contralateral eye; the documentation must clearly identify the unrelated condition and must not reference the corneal graft at all. Modifier −79 applies to surgical procedures unrelated to the PKP performed within the 90-day window; modifier −78 applies to unplanned return to the OR for a complication directly related to the graft (e.g., wound dehiscence, acute graft rejection requiring surgical re-intervention), and its use does not extend or restart the global clock.

🌳 Code Tree — Surgery: Cornea (Keratoplasty)

CPT 65400–65782  Surgery: Cornea
│
├── 65400–65430  Excision (Cornea)
│   ├── 65400  Excision of lesion, cornea (keratectomy, lamellar)
│   └── 65430  Scraping of cornea, diagnostic
│
├── 65710–65775  Keratoplasty (Corneal Transplant)
│   ├── 65710  Keratoplasty; anterior lamellar  (Global: 090)
│   ├── ▶▶ 65730 ◀◀  Keratoplasty; penetrating (except in aphakia or pseudophakia)  ← YOU ARE HERE  (Global: 090)
│   ├── 65750  Keratoplasty; penetrating (in aphakia)  (Global: 090)
│   ├── 65755  Keratoplasty; penetrating (in pseudophakia)  (Global: 090)
│   ├── 65756  Keratoplasty; endothelial  (Global: 090)
│   └── +65757  Backbench preparation of corneal endothelial allograft (add-on to 65756 only)  (Global: ZZZ)
│
└── 65760–65775  Related Corneal Reshaping Procedures
├── 65760  Keratomileusis
├── 65765  Keratophakia
└── 65767  Epikeratoplasty

💰 RVU & Reimbursement Profile

Component	Value
Work RVU (wRVU)	~18.80 (CY2025 base 19.28; −2.5% efficiency adjustment finalized in CY2026 MPFS Final Rule CMS-1832-F; verify against CMS MPFS CY2026 Addendum B before use)
Global Period	090 (90 days)
Bilateral Indicator	1 — Subject to standard CMS bilateral reduction rules; bilateral PKP in the same session is clinically unusual but when billed (two separate eyes, same session), the allowable is 100% for the first eye + 50% for the second
Assistant Surgeon	✅ Payable — modifier −80 (or −82 when a qualified resident is not available; modifier -AS for physician assistant/NP assistant at surgery)
Co-Surgeon	❌ Not applicable — PKP is performed by a single corneal surgeon
Team Surgery	❌ Not applicable
PC/TC Split	❌ No — procedure code only (Indicator 0); no professional/technical component split
Modifier -51 Exempt	No — subject to multiple procedure reduction when billed with other surgical procedures on the same date
Anesthesia	General anesthesia or MAC/IV sedation; reported separately by the anesthesia provider under ASA code 00144 (cataract surgery same session) or 00145 (other eye surgery); topical anesthesia is not the standard for PKP

Bilateral Billing Rules

CPT 65730 has a bilateral indicator of 1, meaning CMS applies standard bilateral reduction to same-session bilateral PKP: the first eye is paid at 100% of the single-code allowable and the second eye at 50%. In practice, same-session bilateral PKP is exceptionally uncommon given the clinical risk and anesthesia burden; staged bilateral PKP performed on separate dates is not subject to bilateral reduction and each eye is billed independently with the appropriate -RT or -LT modifier. When bilateral PKP is billed on the same date, the preferred billing format for most MACs is two separate line items: the first eye with -RT (or -LT) at full fee, and the second eye with the contralateral modifier plus modifier −51 for multiple procedures. Some MACs prefer a single line with modifier −50; verify MAC-specific bilateral billing format preference before submitting, as incorrect format is a common cause of technical denial.

🏷️ Modifier Reference

Modifier	Name	When to Apply
-RT	Right Side	Applied to 65730 when the penetrating keratoplasty is performed on the right eye; required by most payers for all eye procedures to identify laterality; failure to append a laterality modifier on an eye surgery claim is a leading cause of payer rejection and may trigger a medical record request.
-LT	Left Side	Applied to 65730 when the procedure is performed on the left eye; same rules as RT; the operative report and billing must agree on laterality — a discrepancy between the note and the claim is an audit finding.
-50	Bilateral Procedure	Applied when penetrating keratoplasty is performed on both eyes in the same surgical session; same-session bilateral PKP is clinically rare and should be supported by a specific operative note documenting the indication and clinical necessity for bilateral same-session grafting; verify MAC billing format preference (single line with −50 vs. two lines with laterality modifiers).
-25	Significant, Separately Identifiable E/M	Applied to the E/M code — not 65730 — when an office or hospital visit on the same date includes a separately identifiable, medically necessary E/M service beyond the pre-procedure assessment; the clinical note must document a distinct presenting problem, history, examination, and medical decision-making that stands independently from the surgical pre-procedure assessment; examples include a new complaint, a finding in the contralateral eye requiring separate management, or a systemic condition that requires medical decision-making.
-24	Unrelated E/M During Postoperative Period	Applied to an E/M code billed within the 90-day global window for a condition entirely unrelated to the corneal transplant; documentation must clearly identify the unrelated condition and must contain no reference to the graft; the modifier −24 claim is subject to payer review and the medical record must withstand scrutiny confirming the visit had nothing to do with the PKP or its sequelae.
-51	Multiple Procedures	Applied to the lower-valued procedure code when 65730 is performed on the same date as another surgical procedure at the same session; 65730 is typically the primary (highest-valued) code and is not itself appended with −51; apply −51 to the secondary procedure.
-59	Distinct Procedural Service	Applied to 65730 when a payer inappropriately bundles it with another separately reportable procedure (e.g., an iris procedure, vitrectomy, or glaucoma filtering surgery performed at the same session on a different anatomic structure); documents that the services are distinct; the -XS (separate structure), -XE (separate encounter), -XU (unusual non-overlapping service) modifiers may be accepted by some payers as alternatives.
-52	Reduced Services	Applied when PKP is initiated but not completed as described in the full code descriptor — for example, the donor button is placed but suturing cannot be fully completed due to a patient safety event; document reason for reduction thoroughly; payment is negotiated or may be appealed with operative documentation.
-53	Discontinued Procedure	Applied when the PKP is stopped due to an acute patient safety concern (e.g., anesthetic complication, acute cardiac event) after the procedure has been initiated; clinical documentation of the reason for discontinuation is essential; payer reimbursement for a discontinued procedure is not guaranteed and varies by contract.
-58	Staged or Related Procedure During Postoperative Period	Applied to a planned, staged re-intervention performed within the 90-day global period of 65730 or of a prior related procedure; for example, a planned repeat PKP for a failing graft billed within the global period of the original transplant requires −58 to indicate this was a staged therapeutic intervention; the original global period does not restart.
-78	Unplanned Return to OR During Postoperative Period	Applied when the patient returns to the OR within the 90-day global window for an unplanned complication directly related to the PKP — graft dehiscence, wound failure requiring re-suturing, or acute angle closure secondary to the graft; the global period does not restart; payment is made at the base value only, without the post-operative portion of the RVU already accounted for in the original surgery.
-79	Unrelated Procedure During Postoperative Period	Applied to a surgical procedure unrelated to the PKP performed within the 90-day global window — for example, the patient undergoes an unrelated pterygium excision in the other eye or a systemic surgical procedure; the documentation must confirm the procedure is clinically unrelated to the corneal transplant.
-80	Assistant Surgeon	Applied to the assisting surgeon’s claim when a second surgeon provides assistance during the PKP; the assistant surgeon reports 65730-80 and is reimbursed at 16% of the primary surgeon’s allowable under Medicare.
-82	Assistant Surgeon When Qualified Resident Not Available	Used in teaching hospital settings when a qualified resident surgeon is not available to assist; clinical and administrative documentation confirming resident unavailability must be retained.

🩺 Common ICD-10-CM Pairings

Primary Diagnosis Group — Keratoconus

ICD-10	Description	HCC?	Notes
H18.621	Keratoconus, unstable, right eye	❌ No	Use when the right eye keratoconus shows documented progression on serial topography (steepening Kmax, thinning pachymetry), inability to achieve functional contact lens correction, or imminent risk of hydrops; “unstable” must be explicitly documented by the provider, not inferred by the coder from topographic measurements alone; query if the note states only “advanced keratoconus” without a stability determination.
H18.622	Keratoconus, unstable, left eye	❌ No	Same documentation requirements as H18.621; laterality must be confirmed from the operative report and pre-operative notes; do not rely solely on the consent form for laterality.
H18.623	Keratoconus, unstable, bilateral	❌ No	Use only when bilateral keratoconus is documented and both eyes are under active management in the same encounter; for bilateral same-session PKP (rare), both the H18.623 bilateral diagnosis and the −50 or bilateral laterality modifier structure on the CPT claim must be internally consistent.
H18.611	Keratoconus, stable, right eye	❌ No	Appropriate when the indication for PKP is functional visual loss from corneal scarring secondary to prior hydrops or long-standing keratoconus that is no longer actively progressing; document the reason PKP is indicated despite stability (e.g., prior hydrops scar, contact lens failure) to support medical necessity.
H18.612	Keratoconus, stable, left eye	❌ No	Same principles as H18.611; stability does not preclude PKP if functional impairment from scarring is the documented indication.

Primary Diagnosis Group — Corneal Dystrophy (Endothelial / Fuchs’)

ICD-10	Description	HCC?	Notes
H18.511	Endothelial corneal dystrophy, right eye	❌ No	Includes Fuchs’ endothelial dystrophy; use when the right eye endothelial cell count has fallen below a functional threshold with documented guttae, stromal edema, and bullae; the pairing of H18.511 with 65730 should carry a note justifying PKP over DSEK/DMEK, as endothelial-only procedures (65756) are now standard of care for isolated endothelial disease; PKP is appropriate when there is concurrent stromal scarring, irregular astigmatism, or surgeon/patient preference documented.
H18.512	Endothelial corneal dystrophy, left eye	❌ No	Same documentation requirements as H18.511; note that H18.51 (without 6th character) is a non-billable parent code and must not be submitted.
H18.513	Endothelial corneal dystrophy, bilateral	❌ No	Use when bilateral Fuchs’ is documented and the treated eye’s laterality is confirmed; bilateral code is appropriate for the diagnosis even when only one eye is being treated surgically in the current encounter.

Primary Diagnosis Group — Bullous Keratopathy

ICD-10	Description	HCC?	Notes
H18.11	Bullous keratopathy, right eye	❌ No	Bullous keratopathy represents end-stage corneal endothelial decompensation with epithelial bullae causing pain and severely reduced vision; in a phakic eye this diagnosis pairs with 65730; in a pseudophakic eye (aphakic bullous keratopathy from prior cataract surgery without IOL) 65750 applies; in a pseudophakic eye with IOL (pseudophakic bullous keratopathy) 65755 applies — confirm lens status before code assignment.
H18.12	Bullous keratopathy, left eye	❌ No	Same lens status verification applies; document whether bullous keratopathy is from Fuchs’ dystrophy, prior surgery, trauma, or other etiology to support medical necessity narrative.
H18.13	Bullous keratopathy, bilateral	❌ No	Bilateral code is valid for documentation purposes; when surgery is performed on one eye, the operative eye’s laterality-specific code (H18.11 or H18.12) is preferred as the principal/primary procedure diagnosis to match the operative claim’s laterality modifier.

Primary Diagnosis Group — Corneal Opacity / Scarring

ICD-10	Description	HCC?	Notes
H17.11	Central corneal opacity, right eye	❌ No	Use when documented central stromal scarring — from prior bacterial keratitis, herpes simplex keratitis, trauma, or chemical injury — is the primary indication; “central” is the documented location; peripheral opacity not affecting the visual axis may not support PKP medical necessity without additional documentation.
H17.12	Central corneal opacity, left eye	❌ No	Same documentation principles; when opacity is secondary to a specific prior infection or injury, also code the sequela or etiology as an additional diagnosis (e.g., B94.0 — sequelae of trachoma; B00.52 — herpes simplex keratitis as an active or prior diagnosis).
H17.13	Central corneal opacity, bilateral	❌ No	Use as an additional or primary diagnosis when both corneas are documented as scarred; same single-encounter laterality specificity guidance applies.

Failed Corneal Transplant / Etiology Codes

ICD-10	Description	HCC?	Notes
T86.8411	Corneal transplant failure, right eye	❌ No	Report as the primary diagnosis when re-grafting a failing or failed right-eye corneal transplant; graft failure must be documented by the physician (endothelial cell count below functional threshold, persistent stromal edema unresponsive to hypertonic saline, or irreversible rejection) — do not assign failure solely on coder interpretation of imaging values; always requires a 7th character for laterality (1=right, 2=left, 3=bilateral).
T86.8412	Corneal transplant failure, left eye	❌ No	Same requirements; note that T86.840x (rejection) and T86.841x (failure) are distinct — rejection is reversible immune-mediated inflammation, failure is irreversible endothelial loss; when documentation uses both terms, query the provider for clarification before assigning.
T86.8401	Corneal transplant rejection, right eye	❌ No	Report when the documented indication for re-grafting is an acute rejection episode that has progressed to irreversibility; if rejection is treated successfully and a re-graft is not needed, 65730 is not appropriate — the rejection episode maps to medical management codes only.

Coding Specificity Reminder

The corneal dystrophy codes (H18.51x), keratoconus codes (H18.6xx), bullous keratopathy codes (H18.1x), and corneal opacity codes (H17.1x) all require a laterality-specific character — none of the parent codes (H18.51, H18.62, H18.1, H17.1) are billable for CY2026 claims and submission of a parent code will generate a claim rejection. The failed transplant codes (T86.84xx) now require both a 6th character indicating complication type (0=rejection, 1=failure, 2=infection, 8=other) and a 7th character indicating laterality (1=right, 2=left, 3=bilateral), per the FY2021 expansion of the T86.84xx family; claims using T86.841x (without laterality) are non-billable and will reject. When laterality is not documented in the record, a compliant provider query is required before assigning a laterality-specific code — do not default to an unspecified code if the documentation elsewhere in the record (operative report, consent form, clinical note) confirms the eye that was treated.

🏥 MS-DRG Considerations (Inpatient)

CPT 65730 is performed in the outpatient or ambulatory surgical center setting in the overwhelming majority of cases; inpatient admission solely for penetrating keratoplasty is not supported by any CMS MAC or InterQual/MCG utilization review standard. When a patient is admitted inpatient for a co-morbid medical or surgical condition and receives a PKP during the same stay, the facility coder assigns the corresponding ICD-10-PCS Replacement code (see PCS section below). In the inpatient facility setting, the corneal diagnosis (keratoconus H18.621, Fuchs’ H18.511, bullous keratopathy H18.11, corneal opacity H17.11, or failed graft T86.841x) will group to MDC 02 (Diseases and Disorders of the Eye) under MS-DRG V43.0. If the eye surgery procedure is designated as an OR procedure by the MS-DRG grouper, the case may group to DRG 113 (Orbital, Ocular Adnexa, and Conjunctival Procedures) or related surgical DRGs; if it is a non-OR procedure, the diagnosis groups to DRG 124 (Other Disorders of the Eye with MCC) or DRG 125 (Other Disorders of the Eye Without MCC). The GMLOS and relative weight for DRG 124/125 should be verified against the CMS IPPS FY2026 Final Rule (CMS-1808-F) Addendum A, as these values are updated annually and the figures from prior years are not reliable for current-year calculations.

🔧 ICD-10-PCS Equivalents (Inpatient Facility Coding)

Note

Inpatient PCS coding for PKP is encountered rarely, as this procedure is almost universally performed in the outpatient or ASC setting. When assigned on an inpatient claim, the PCS Replacement codes for the cornea map to Table 08R (Medical and Surgical, Eye, Replacement) and do not independently drive a major DRG shift in most clinical scenarios. The key root operation selection issue is Replacement (R) vs. Supplement (U): Replacement is correct when the host cornea is excised and a donor button placed in its full-thickness position; Supplement would apply if donor tissue were placed over or onto an existing host cornea without excision of the native tissue — for standard PKP, Replacement is the correct root operation in all cases.

PCS Code	Full Description	Applicable Modality
`08R8XKZ`	Replacement of Right Cornea with Nonautologous Tissue Substitute, External Approach	Standard PKP using eye bank cadaveric donor cornea (nonautologous); this is the most commonly assigned PCS code for penetrating keratoplasty in the right eye and should be used for virtually all PKP procedures using donated tissue.
`08R9XKZ`	Replacement of Left Cornea with Nonautologous Tissue Substitute, External Approach	Standard PKP using cadaveric donor tissue, left eye; same device and approach logic as 08R8XKZ; PCS does not use modifier equivalents for bilateral procedures — assign two separate PCS codes for bilateral same-session PKP.
`08R8X7Z`	Replacement of Right Cornea with Autologous Tissue Substitute, External Approach	Use only when documented autologous corneal tissue is used (extremely rare in PKP — applicable in research or unique reconstructive scenarios using the patient’s own tissue from the contralateral eye or cultivated epithelium); this code should not be defaulted to for standard eye bank PKP.
`08R9X7Z`	Replacement of Left Cornea with Autologous Tissue Substitute, External Approach	Same autologous tissue caveat as 08R8X7Z; confirm device type from operative report and eye bank documentation before assigning autologous vs. nonautologous.

PCS Character Analysis — 08R8XKZ

Position	Character	Value	Definition
1	Section	0	Medical and Surgical — the root section for all operative procedures performed on anatomic body parts; PKP is classified here because it involves direct operative manipulation and replacement of a body part (the cornea).
2	Body System	8	Eye — encompasses all structures of the globe and ocular adnexa; the cornea, as the anterior transparent surface of the globe, is coded within this body system.
3	Root Operation	R	Replacement — defined in PCS as putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part, with the native body part taken out; PKP precisely meets this definition because the full-thickness host cornea is excised and a donor corneal button replaces it.
4	Body Part	8	Cornea, Right — the specific body part being replaced; “9” is assigned for the left cornea; PCS does not have a bilateral body part value for the cornea, so bilateral PKP requires two separate PCS code lines.
5	Approach	X	External — in PCS, External approach is defined as procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through skin or mucous membrane, as well as direct procedures on exposed surface structures; the cornea is an exposed, accessible surface structure and PKP does not require a skin incision, making External the appropriate approach value.
6	Device	K	Nonautologous Tissue Substitute — cadaveric eye bank donor cornea is classified as nonautologous (not from the patient) tissue; “7” (Autologous) applies only to the patient’s own tissue; “J” (Synthetic Substitute) would apply if a synthetic corneal prosthesis (keratoprosthesis, e.g., Boston KPro) were used — Boston KPro placement maps to a different PCS code and would not use the same table entry as standard PKP.
7	Qualifier	Z	No Qualifier — no additional qualifier applies to standard PKP; qualifier “X” (Diagnostic) is reserved for biopsies and does not apply to therapeutic replacements.

Root Operation Comparison: Replacement vs. Supplement vs. Alteration

Use Replacement (R) — code 08R8XKZ or 08R9XKZ — when the surgeon excises the full-thickness host cornea and places a donor button in its anatomic position; this is the correct root operation for any standard PKP regardless of suture technique or graft diameter, because the defining feature is excision of the native part and replacement with biological material.

Use Supplement (U) — Table 08U — when donor tissue is placed over or on top of an existing host cornea without full-thickness excision; this root operation applies to amniotic membrane grafts, patch grafts for perforations, and certain onlay techniques — it does not apply to standard PKP.

Use Replacement (R) with Device K (Nonautologous) for Boston KPro or other keratoprosthesis if a synthetic device physically replaces the corneal button — verify the device code with the PCS Table 08R and confirm the specific prosthetic material from the operative report; the qualifier may differ, and the implant documentation should be reviewed before assigning the device character.

📝 Coding Examples

Example 1 — ASC: Phakic Penetrating Keratoplasty for Advanced Keratoconus, Right Eye

Clinical Scenario: A 34-year-old male with a 12-year history of bilateral keratoconus presents for PKP of the right eye. Serial topography over the prior 18 months documents progression of Kmax from 62D to 74D; the patient has been contact lens intolerant for 8 months and BCVA in the right eye is 20/200. The left eye is stable at Kmax 54D and tolerates a scleral lens. The surgeon documents “phakic right eye, crystalline lens clear and in position” in the operative note. A right-eye penetrating keratoplasty is performed under general anesthesia using a 7.75 mm donor button and 16 interrupted 10-0 nylon sutures; the anterior chamber is reformed with BSS. The patient is seen in a brief pre-operative assessment on the same date; no separate E/M problem is identified. Documentation clearly states: “keratoconus, unstable, right eye — progressive topographic disease with contact lens intolerance; phakic eye.”

Field	Code	Rationale
CPT	65730-RT	Penetrating keratoplasty, phakic right eye confirmed in operative note; RT modifier documents laterality; no E/M on same date qualifies for −25 because the pre-operative assessment is bundled into the global payment and no separate E/M problem was identified.
PDx	H18.621	Keratoconus, unstable, right eye — most specific billable code for the documented progressive keratoconus with confirmed right-eye laterality; “unstable” is explicitly documented in the operative note; H18.62 (without laterality) is a non-billable parent and must not be submitted.
SDx	H18.612	Keratoconus, stable, left eye — documented as a co-existing condition being monitored; report as additional diagnosis per UHDDS definition of “other diagnoses” — conditions monitored during the encounter that affect patient care.

Note

HCPCS code V2785 (Processing, preserving and transporting corneal tissue) should be reported by the ASC facility on the facility claim alongside 65730 on the professional claim; V2785 is not separately billable by the surgeon. The surgeon’s claim should reflect only the 65730 -RT CPT code with the appropriate diagnosis; failure of the facility to report V2785 may affect facility reimbursement under the OPPS and ASC payment systems but does not affect the surgeon’s professional claim.

Example 2 — Outpatient Hospital: Bilateral Staged PKP, Second Eye During Global Period of First Eye

Clinical Scenario: A 58-year-old female with bilateral advanced keratoconus underwent right-eye PKP (CPT 65730-RT) 45 days ago; she is phakic in both eyes. The left eye BCVA has deteriorated to 20/400 since the right-eye surgery and the surgeon determines PKP of the left eye is now necessary. The surgeon documents “phakic left eye; keratoconus unstable left eye, progressive; contact lens intolerant bilateral” and performs a left-eye PKP under general anesthesia. The surgeon also performs a brief post-operative check of the right graft at the same visit, noting the graft is clear and the sutures are intact.

Field	Code	Rationale
CPT 1	65730 -LT-58	Penetrating keratoplasty, phakic left eye; modifier −58 (staged procedure during postoperative period) is required because this procedure is performed within the 90-day global period of the prior right-eye PKP and is a planned, staged therapeutic procedure; the original right-eye global period does not restart.
CPT 2	—	The right graft post-operative check performed at the same visit is not separately billable — it is bundled into the 90-day global period of the right-eye 65730 performed 45 days prior; no E/M or evaluation code should be billed for the right-eye graft surveillance visit within the global window.
PDx	H18.622	Keratoconus, unstable, left eye — primary indication for the left-eye PKP; laterality-specific billable code.
SDx	H18.621	Keratoconus, unstable, right eye — co-existing condition with prior treatment; report as additional diagnosis reflecting the managed status of the right eye.

Warning

Modifier −58 is required on the left-eye 65730 claim because it falls within the 90-day global period of the prior right-eye procedure; submitting the left-eye PKP without −58 will appear as a routine post-operative service to the payer’s system and will be denied as bundled with the right-eye global period. Modifier −58 does not restart the right eye’s global clock; each eye’s global period runs independently. The surgeon must retain documentation in the record confirming the left-eye PKP was a separately planned therapeutic decision and not a complication or staged repair of the right-eye procedure.

Example 3 — ASC: Re-Graft for Corneal Transplant Failure, Right Eye (Within Global Period of Original Graft)

Clinical Scenario: A 62-year-old male with a history of right-eye PKP performed 60 days ago for endothelial corneal dystrophy presents with worsening right-eye corneal edema, decreased BCVA to count fingers, and documented endothelial cell count of 280 cells/mm². The corneal specialist documents “graft failure, right eye — irreversible endothelial decompensation; phakic right eye confirmed by slit lamp; proceeding with repeat PKP, right eye; patient counseled on guarded prognosis for second graft.” A right-eye re-PKP is performed under general anesthesia.

Field	Code	Rationale
CPT	65730-RT-58	Re-PKP, phakic right eye; modifier −58 (staged procedure during postoperative period) is required because the re-graft is performed within the 90-day global window of the original right-eye PKP and is a planned staged therapeutic procedure; the operative note explicitly documents “proceeding with repeat PKP” — planned re-intervention language satisfies the −58 requirement.
PDx	T86.8411	Corneal transplant failure, right eye — primary diagnosis for the re-graft encounter; the failure code drives the medical necessity narrative and must include the 7th character for right-eye laterality (1); T86.841 without the 7th character is non-billable and will generate a claim rejection.
SDx	H18.511	Endothelial corneal dystrophy, right eye — the underlying condition that originally required PKP; report as an additional diagnosis reflecting the etiology of the graft failure.

Global Period Reminder

The original right-eye 65730 performed 60 days ago established a 90-day global period running through day 90 post-surgery. The re-graft on day 60 falls within this window, which is why modifier −58 is mandatory — without it, the payer will deny the re-graft claim as a bundled post-operative service. Modifier −58 does not extend the original 90-day global clock; the original global period continues through its original end date. The re-graft itself, however, triggers its own new and independent 90-day global period beginning on the re-graft date, meaning all post-re-graft visits and care now fall under the new global window. If the re-graft had been an emergency unplanned return for acute wound failure (dehiscence) rather than a planned re-graft, modifier −78 (unplanned return to OR) would apply instead of −58 — the distinction turns on whether the return was anticipated and planned (−58) or unplanned/emergent (−78).

⚠️ Common Coding Pitfalls

Billing 65730 when the patient is pseudophakic: The most prevalent and most auditable error in the PKP code family is selecting 65730 when the operative note documents an intraocular lens in the eye. A statement anywhere in the surgical record — the consent, the pre-op H&P, the operative note — confirming the presence of an IOL mandates 65755 regardless of any other clinical feature. Coders must confirm lens status directly from the operative note or pre-operative documentation for every PKP claim; do not rely on the diagnosis code or the patient’s age to infer lens status.
Separately reporting V2785 on the surgeon’s professional claim: HCPCS V2785 (Processing, preserving and transporting corneal tissue) is a facility-level code reportable by the ASC or outpatient hospital on the facility/technical claim to capture the cost of the eye bank tissue. It is not separately reportable by the operating surgeon on the professional fee claim; submitting V2785 on a physician claim constitutes a billing error and will generate either a denial or an overpayment that may trigger a repayment demand on audit. The surgeon’s claim includes only the 65730 CPT code.
Applying E1–E4 eyelid modifiers to corneal surgery: Modifiers -E1 (upper left eyelid), -E2 (lower left eyelid), -E3 (upper right eyelid), and -E4 (lower right eyelid) are anatomically specific to the eyelid margin and are NOT applicable to corneal or conjunctival procedures. PKP laterality is documented using -RT or -LT only; submitting E-modifiers with 65730 is a claim format error that may cause denial or manual review. If a payer’s claim edits reject the -RT or -LT modifier for an eye procedure, confirm the payer’s modifier requirements before substituting E-modifiers.
Failing to append modifier −58 for a re-graft within the global period: When a second PKP is planned and performed within the 90-day global window of a prior eye procedure, modifier −58 (staged or related procedure during postoperative period) is required. Submitting the re-graft without −58 results in automatic denial as a bundled post-operative service; appending −78 instead of −58 for a planned re-graft is also incorrect and creates a compliance risk because −78 carries a different payment formula (base value only). The operative note should use language confirming the re-intervention was “planned” or “staged” to support −58; unplanned emergent returns use −78.
Unbundling routine post-operative visits from the 90-day global: The 90-day global period for 65730 bundles all suture adjustment visits, suture removal, topical medication management, and standard graft surveillance through day 90 into the surgical payment; separately billing office visit codes (992xx or 920xx) for these visits within the global window without a compliant modifier (−24 for unrelated E/M) generates overpayments. The operational compliance requirement is to maintain a global period tracking log with the PKP procedure date, calculated end date (surgery date + 90 days), and a flag suppressing routine post-operative visit billing for that patient through the global end date.
Using the non-billable parent code T86.841 (without laterality) for graft failure: The FY2021 ICD-10-CM expansion of the T86.84 family added 7th-character laterality to all complication subtypes; T86.841 (failure without laterality) became non-billable on October 1, 2021 and remains non-billable for CY2026. Claims submitted with T86.841 will reject; the correct codes are T86.8411 (right), T86.8412 (left), or T86.8413 (bilateral). The same applies to T86.840x (rejection), T86.842x (infection), and T86.848x (other complication) — all require the 7th-character laterality digit. Legacy encounter form templates, problem lists, and encoder default values that pre-date the FY2021 update may still populate the non-billable 6-character codes and should be audited and corrected.

📎 Sources

¹ AMA CPT 2026 Professional Edition — Surgery: Cornea, Keratoplasty subsection; CPT codes 65710–65775 with full descriptors, parenthetical notes, and cross-references; verify lens-status code selection rules in the CPT codebook parentheticals for codes 65730, 65750, 65755 ² CMS Calendar Year 2026 Medicare Physician Fee Schedule Final Rule (CMS-1832-F), effective January 1, 2026 — Addendum B (RVU file for all codes including 65730); wRVU, global period, bilateral indicator, assistant surgery, and PC/TC indicator values; −2.5% efficiency adjustment applied to applicable procedural codes per the CY2026 MPFS efficiency adjustment provisions ³ CMS MPFS CY2026 Relative Value File (RVU26A) — verify wRVU, practice expense RVU, malpractice RVU, and conversion factor ( $33.40 n o n - A PM /$ 33.57 qualifying APM) for current payment calculation ⁴ CMS NCCI Policy Manual for Medicare Services, Chapter 8 (Radiology/Ophthalmology), current edition — bundling edits applicable to corneal surgery codes 65710–65775; verify PTP and MUE edits for same-day service combinations ⁵ ICD-10-CM Official Guidelines for Coding and Reporting FY2026 (CMS/NCHS), effective October 1, 2025 — Section I.B (general coding guidelines), Section I.C.7 (diseases of the eye), Section II (principal diagnosis selection); applicable Tabular List notations for H17, H18.1, H18.5, H18.6, and T86.84 families ⁶ ICD-10-CM FY2026 Tabular List of Diseases and Injuries — Chapter 7 (H00–H59); Category H17 (corneal scars), H18 (other corneal disorders), T86.84 (corneal transplant complications with 7th-character laterality expansion effective FY2021) ⁷ ICD-10-PCS FY2026 Official Guidelines for Coding and Reporting — Section B3 (root operation selection); Table 08R (Medical and Surgical, Eye, Replacement); verify approach, device, and qualifier character assignments for corneal transplant procedures ⁸ CMS MS-DRG V43.0 Definitions Manual (effective October 1, 2025) — MDC 02: Diseases and Disorders of the Eye; DRG 113–115 (orbital/ocular procedures) and DRG 124–125 (other eye disorders); verify OR vs. non-OR procedure designation for ICD-10-PCS Table 08R codes in the current grouper logic ⁹ American Academy of Ophthalmology (AAO) — “New ICD-10 Codes for Corneal Dystrophy and Transplants,” EyeNet/Ophthalmology Management (published ahead of print December 2020; online March 2021); guidance on FY2021 laterality expansion of H18.51x and T86.84x code families ¹⁰ American Academy of Ophthalmology (AAO) — “Corneal Tissue — Focus on 5 Areas to Streamline Reimbursement,” EyeNet/AAO One Network (updated 2024); HCPCS V2785 billing rules for facility vs. professional claims; add-on code +65757 scope of application ¹¹ Ophthalmology Management — “Coding and Reimbursement: Modifiers −58 and −78 in Global Period Scenarios,” June 2023 (print edition); PKP Case 4 — graft dehiscence within global period, modifier −78 application and global period rules ¹² AAO EyeNet — “Billing and Coding for Keratoconus,” September 2020; code selection guidance for 65730 vs. 65750 vs. 65755 based on lens status; Z94.7 (corneal transplant status) for post-transplant contact lens billing ¹³ CMS ASC Covered Procedures List and Payment Indicators — confirm CY2026 ASC payment status for CPT 65730; V2785 ASC facility billing guidance per CMS Manual System Transmittals including Transmittals applicable to corneal tissue HCPCS codes

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