T85.22XA — Displacement of Intraocular Lens, Initial Encounter

Code Overview

T85.22XA is a billable ICD-10-CM diagnosis code for displacement of intraocular lens, initial encounter. It belongs to the T85.2 subcategory (Mechanical complication of intraocular lens) within T85 (Complications of other internal prosthetic devices, implants and grafts), Chapter 19 (Injury, Poisoning and Certain Other Consequences of External Causes, S00-T88).

The 7th character “A” designates initial encounter — the patient is actively receiving evaluation and/or treatment for this complication. The double “X” placeholder in positions 4 and 5 is structurally required to reach the 7th character position. T85.22XA captures IOL displacement, dislocation, subluxation, and malposition — situations where the IOL is structurally intact but has moved from its intended position within the eye. This is fundamentally different from T85.21XA (IOL breakdown — structural failure) and T85.29XA (other mechanical IOL complication).

T85.22XA is designated as a CC in the CMS MS-DRG system, meaning it can upgrade DRG tier as a secondary diagnosis. It is supported by CMS as a covered diagnosis for ophthalmic biometry (CPT 76519, 92136) and is one of the most clinically and procedurally complex IOL complication codes in ophthalmology.

Full Code Description

Element	Detail
Full Code	T85.22XA
Description	Displacement of intraocular lens, initial encounter
Encounter Type	A = initial encounter (active treatment phase)
Placeholder	XX in positions 4 and 5 — required to reach 7th character
Billable	Yes
Chapter	19 — Injury, Poisoning and Certain Other Consequences of External Causes
Block	T80-T88 — Complications of surgical and medical care, NEC
Category	T85 — Complications of other internal prosthetic devices, implants and grafts
Subcategory	T85.2 — Mechanical complication of intraocular lens
Laterality	Not applicable — T85.22 does not differentiate OD vs OS
7th Character	A = initial; D = subsequent; S = sequela
CC/MCC Status	CC — confirmed per CMS MS-DRG
Valid FY	FY2025 (Oct 1, 2024 - Sep 30, 2025)

Clinical Description

What Is IOL Displacement?

IOL displacement (also referred to as IOL dislocation, subluxation, or malposition) describes a condition in which an intraocular lens — structurally intact — has shifted from its intended anatomical position within the eye. The IOL is the correct device; it is not broken (T85.21XA) or otherwise mechanically failing (T85.29XA) — it has simply moved from where it was placed or where it should be.

Displacement can range from:

Mild decentration (edge of optic impinging on the visual axis, causing dysphotopsia)
Subluxation (partial displacement; IOL still partially within the capsular bag or sulcus but tilted or rotated beyond acceptable parameters)
Complete dislocation into the posterior segment (IOL falls entirely into the vitreous cavity)
Anterior chamber dislocation (IOL migrates forward past the iris into the anterior chamber)
Iris capture (optic prolapses through the pupil, causing IOL to become entrapped by the iris)

IOL Positional Anatomy

To understand displacement, it is essential to understand the intended and unintended positions an IOL can occupy:

Intended positions:

Capsular bag — the preferred position; the IOL is secured within the envelope of the crystalline lens capsule following phacoemulsification; provides the most stable, centered, physiologic position
Ciliary sulcus — the groove between the posterior surface of the iris and the anterior surface of the ciliary body; used when the posterior capsule is ruptured or insufficient for in-the-bag placement
Anterior chamber — anterior to the iris; occupied by anterior chamber IOLs (ACIOLs) fixated in the anterior chamber angle; older design; higher risk of corneal endothelial damage

Unintended positions (displacement states):

Posterior subluxation — IOL partially into the vitreous/posterior to the capsular bag plane; still visible on slit lamp but clearly shifted posteriorly
Complete posterior dislocation — IOL entirely within the vitreous cavity, often sitting on the retinal surface; requires PPV for retrieval
Anterior dislocation — IOL in the anterior chamber when not designed to be there; risks corneal endothelial damage, angle damage, and elevated IOP
Iris capture — optic of a posterior chamber IOL prolapses anteriorly through the pupil; lens partially anterior, partially posterior to the iris
Toric IOL rotation — toric IOLs rotate away from their intended meridional axis; ≥ 10-30° rotation depending on power significantly degrades astigmatic correction and may be coded T85.22XA (displacement/malposition) or T85.29XA (other mechanical complication) depending on documentation

Risk Factors and Causes of IOL Displacement

Early displacement (within days to weeks of surgery):

Posterior capsule rupture (PCR) during cataract surgery — most significant intraoperative risk factor; loss of posterior capsular support means the IOL lacks its primary scaffolding; sulcus placement in PCR eyes has inherently less stability
Zonular dialysis / zonular loss — loss of zonular fibers during surgery from pre-existing zonular weakness (pseudoexfoliation, Marfan syndrome, prior trauma) or intraoperative manipulation
Incorrect IOL sizing — an IOL too small for the capsular bag may shift or decentrate
Wrong IOL position at time of surgery — sulcus IOL placed too anteriorly or incorrectly oriented
Wound or incision-related changes — anterior chamber fluctuation in the early post-op period can shift an incompletely supported IOL

Late displacement (months to years after surgery):

Capsular bag contraction syndrome (capsular phimosis) — progressive fibrotic contraction of the anterior capsulorrhexis produces asymmetric forces on the IOL, causing decentration and eventual subluxation; more common with certain IOL designs (plate haptic lenses) and smaller capsulorrhexis sizes
Progressive zonular loss — the leading cause of late in-the-bag IOL dislocation:
- Pseudoexfoliation syndrome (PXF) — the most common identifiable cause of late IOL-bag complex dislocation; PXF material accumulates on the zonular fibers, causing progressive mechanical weakness; bilateral involvement is common even when only one eye is symptomatic
- Prior trauma — direct blunt or penetrating trauma causing zonular disruption; may be years old and progressive
- Marfan syndrome — systemic fibrillin-1 mutation causing congenitally weak, elongated zonules; high risk of progressive zonular instability
- Homocystinuria — metabolic disorder with downward lens dislocation; IOL placed in these eyes similarly at risk
- Retinitis pigmentosa — associated with progressive zonular degeneration
- High myopia — associated with generalized zonular weakness and posterior staphyloma
- Uveitis — inflammatory mediators degrade zonular fibers over time
- Prior vitreoretinal surgery — PPV alters vitreous support and may destabilize the posterior capsule; gas tamponade can exert forward pressure on the IOL-capsular bag complex
Long-term spontaneous capsular bag contraction — without PXF; occurs over decades; the entire IOL-bag complex subluxates as zonular loss progresses

Trauma-related displacement:

Blunt ocular trauma (sports injury, MVA, assault) can acutely subluxate or dislocate even a previously well-positioned IOL through zonular disruption or direct force
Penetrating trauma can directly displace the IOL

Grades and Types of IOL Displacement

Classification	Description	Clinical Urgency	Typical Management
Mild decentration	IOL optic edge partially in visual axis; patient symptomatic with dysphotopsias; IOL still mostly in correct position	Elective	Observation, YAG capsulotomy, IOL exchange depending on cause
Subluxation	Partial displacement; IOL visible behind the pupil but clearly shifted/tilted; still in anterior segment	Urgent-elective	IOL repositioning (66825), sulcus transposition, IOL exchange (66986)
Iris capture	IOL optic trapped by pupil — partially anterior, partially posterior to iris	Urgent	Pharmacologic dilation + repositioning; may require surgical correction
Anterior chamber dislocation	IOL in anterior chamber; corneal endothelial damage risk	Urgent	Surgical repositioning or exchange — emergency if corneal decompensation
Posterior dislocation — vitreous	IOL partially or fully in vitreous cavity	Urgent-emergent depending on vision	PPV + IOL retrieval + IOL repositioning, exchange, or secondary implant
Posterior dislocation — retinal surface	IOL resting on retina	Emergent	PPV + IOL removal + retinal evaluation
Toric IOL rotation	IOL rotated off intended axis; residual astigmatism	Elective	IOL rotation (66825) or exchange (66986) if correction insufficient

Clinical Presentation

Patients with IOL displacement typically present with:

Sudden or progressive decrease in visual acuity — depending on severity and timeline of displacement
Monocular diplopia or ghost images — from prismatic effects of the displaced, tilted, or decentered optic
Dysphotopsias — edge effects, arc flashes, halos from the IOL edge traversing the visual axis
Visible IOL edge or reflection — patient or provider can see the IOL edge within the pupillary aperture
Induced astigmatism — IOL tilt creates astigmatic error not present post-operatively
Reduced near vision (if toric) — rotation of toric IOL degrades the astigmatic correction
Corneal edema — if IOL has migrated to the anterior chamber and is traumatizing the endothelium (bullous keratopathy)
Elevated IOP — if anterior displacement impedes aqueous outflow or pupillary block
Phacodonesis (IOL trembling) — visible trembling of the IOL with eye movement indicates severely compromised zonular/capsular support
Vitreous hemorrhage or retinal detachment — rare concurrent finding when posterior dislocation involves significant vitreous traction

Diagnosis and Workup

Slit-lamp biomicroscopy (dilated):

Assessment of IOL position, tilt, decentration, and edge location relative to pupil
Evaluation of the capsular bag integrity, anterior capsulorrhexis contraction
Retroillumination for posterior capsule assessment
Assessment for iris capture and anterior chamber IOL damage

Gonioscopy:

When anterior displacement or angle involvement is suspected
Evaluation of anterior chamber angle for IOL touch, synechiae, secondary glaucoma risk

Scheimpflug imaging (Pentacam) / OCT anterior segment:

Precise quantification of IOL decentration, tilt angle, and depth
Capsular bag contraction mapping
Effective lens position calculation

Dilated fundus exam:

Rule out concurrent retinal pathology (detachment, vitreous hemorrhage) especially in posterior dislocation
Assess retinal relationship to displaced IOL in severe posterior dislocation

B-scan ultrasound:

When media opacity prevents visualization of posteriorly displaced IOL
Confirms IOL location within vitreous cavity

Optical biometry (OCT biometry, IOLMaster, Lenstar):

IOL power calculation for IOL exchange planning
Axial length remeasurement in the absence of the original IOL
CMS explicitly lists T85.22XA as a covered diagnosis for CPT 76519, 92136

7th Character Table

7th Char	Full Code	Description	When to Use
A	T85.22XA	Initial encounter	All encounters while actively evaluating and treating the IOL displacement — includes pre-op visits, surgery, early post-op within active treatment
D	T85.22XD	Subsequent encounter	Follow-up during recovery after repositioning or exchange; routine healing phase
S	T85.22XS	Sequela	Late effects of the IOL displacement — residual vision loss, corneal decompensation from prior dislocation

Note

7th character “A” persists throughout active treatment: Per Chapter 19 Official Guidelines, the “A” character is used at every encounter while active treatment is ongoing — from initial discovery through surgical correction and into the early post-operative period. The switch to “D” occurs once the patient enters the routine monitoring/healing phase following surgical correction.

Code Structure / Code Tree

S00-T88    Injury, poisoning and certain other consequences of external causes
  └── T80-T88    Complications of surgical and medical care, NEC
        └── T85    Complications of other internal prosthetic devices, implants and grafts
              │    Excludes2: failure and rejection of transplanted organs/tissue (T86.-)
              │
              ├── T85.0    Mechanical complication of ventricular intracranial shunt
              ├── T85.1    Mechanical complication of implanted electronic stimulator of NS
              ├── T85.2    Mechanical complication of intraocular lens    ◄ SUBCATEGORY
              │     ├── T85.21    Breakdown (mechanical) of intraocular lens
              │     │     ├── [[T85.21XA]]    ... initial encounter (IOL fractured/opacified)
              │     │     ├── [[T85.21XD]]    ... subsequent encounter
              │     │     └── [[T85.21XS]]    ... sequela
              │     ├── T85.22    Displacement of intraocular lens    ◄ PARENT
              │     │     ├── T85.22XA    ... initial encounter    ◄ THIS CODE
              │     │     ├── [[T85.22XD]]    ... subsequent encounter
              │     │     └── [[T85.22XS]]    ... sequela
              │     └── T85.29    Other mechanical complication of IOL
              │           ├── [[T85.29XA]]    ... initial encounter
              │           ├── [[T85.29XD]]    ... subsequent encounter
              │           └── [[T85.29XS]]    ... sequela
              ├── T85.3    Mechanical complication of other ocular prosthetic devices
              │     ├── [[T85.31]]    Breakdown of prosthetic orbit of eye
              │     ├── [[T85.32]]    Displacement of prosthetic orbit of eye
              │     └── [[T85.39]]    Other mechanical complication, ocular prosthetic device
              ├── T85.4    Mechanical complication of breast prosthesis/implant
              ├── T85.5    Mechanical complication of GI prosthetic devices
              ├── T85.6    Mechanical complication of other internal prosthetic devices
              ├── T85.7    Infection/inflammatory reaction due to prosthetic devices
              └── T85.8    Other specified complications of internal prosthetic devices

Information

T85.22XA vs T85.21XA vs T85.29XA — know the mechanical distinction:

T85.21XA = IOL structurally broken — fractured haptic, cracked optic, opacified/calcified material

T85.22XA = IOL structurally intact but has moved out of position — dislocated, subluxated, decentered, rotated out of intended meridian

T85.29XA = Other mechanical IOL complication — decentration without clear displacement, other mechanical issue not fitting the above two categories; note: some sources code toric IOL rotation here vs T85.22XA; follow provider documentation

Includes / Excludes Notes

Includes (T85.22 — Displacement of IOL)

T85.22XA is appropriate for all forms of IOL positional disruption where the IOL is structurally intact:

IOL dislocation (complete displacement from intended anatomical compartment)
IOL subluxation (partial displacement from intended position)
IOL malposition (IOL in incorrect position relative to intended alignment)
In-the-bag IOL-capsular complex dislocation (entire IOL + bag complex displaced due to zonular loss)
IOL posterior dislocation into vitreous (IOL fallen into vitreous cavity)
IOL anterior chamber migration (IOL moved from posterior to anterior chamber unintentionally)
Iris capture of the IOL optic (IOL partially trapped by the iris)
Toric IOL rotational malposition (when coded as displacement/malposition rather than T85.29XA)
In-the-bag complex subluxation from pseudoexfoliation-related zonular dialysis

Excludes1 at T85.22 — Mutually Exclusive

Code	Description	Reason
Z96.1	Presence of intraocular lens (pseudophakia)	Z96.1 = IOL in correct position and functioning normally; T85.22XA = IOL has moved out of position; these are mutually exclusive for the same eye at the same encounter

After correction: Once the displaced IOL is repositioned or exchanged and the new/repositioned IOL is confirmed in good position, Z96.1 is again the appropriate code for future encounters — T85.22XA is no longer applicable and the Excludes1 no longer restricts Z96.1.

Excludes2 at T85 Category — Can Code Together When Both Present

Code	Description	Can Code With T85.22XA?
T85.21XA	Breakdown of IOL	Yes — if the IOL is BOTH displaced AND structurally broken/fragmented
T86.-	Failure and rejection of transplanted organs	Yes — if concurrent transplant complication present
H26.4-	Posterior capsular opacification	Yes — PCO can coexist or be the underlying cause of bag displacement
H33.-	Retinal detachment	Yes — RD may coexist with or result from displaced IOL/zonular instability
H59.03-	CME following cataract surgery	Yes — if CME coexists with IOL displacement
H43.39-	Vitreous opacities	Yes — vitreous involvement in posterior IOL dislocation

Code Also Instructions

Code also any retained foreign body (Z18.-) if a fragment or the entire IOL remains in an unintended location
Code also any associated injury or concurrent ocular pathology being managed in the same encounter

Critical Note: T85.22XA vs H27.1- (Natural Lens Dislocation)

Scenario	Correct Code
Displaced IOL (artificial lens that was surgically implanted)	T85.22XA
Dislocated natural (crystalline) lens — ectopia lentis	H27.1- (subluxation of lens) or H27.1- (dislocation of lens)

Note

This distinction is critical and is a common coding error. T85.22XA is only for artificial IOLs — the implanted prosthetic device. For natural lens dislocation (Marfan syndrome, trauma to phakic eye, ectopia lentis), the correct codes are H27.10-H27.13 (subluxation) or H27.11-H27.13 (dislocation depending on OD/OS/bilateral). Do not use T85.22XA for a natural lens.

HCC (Hierarchical Condition Category) Mapping

T85.22XA does NOT map to a CMS-HCC in any current risk adjustment model.

HCC Model	HCC Assignment	RAF Impact
CMS-HCC Model V28	Not assigned	No RAF
RxHCC Model	Not assigned	No RAF
HHS-HCC (ACA Marketplace)	Not assigned	No RAF

Note

Underlying cause HCC opportunity: While T85.22XA carries no direct RAF weight, the conditions that cause IOL displacement often carry significant HCC weight. Pseudoexfoliation glaucoma (H40.10-), Marfan syndrome (Q87.40), and high myopia with degenerative changes (H44.2-) are all conditions that may be concurrently documented and coded alongside T85.22XA — capturing these ensures accurate risk adjustment for patients with complex ocular comorbidities driving the IOL displacement.

MS-DRG Mapping (Inpatient)

IOL displacement is predominantly managed outpatient or ASC. Inpatient admission occurs when posterior segment complexity, systemic comorbidities, or combined procedures require it.

CC/MCC Status

T85.22XA is confirmed as a CC in the CMS MS-DRG system. As a secondary diagnosis alongside a qualifying principal diagnosis, T85.22XA upgrades the DRG from the no-CC/MCC tier to the CC tier — a meaningful reimbursement impact.

Scenario	DRG Impact
Surgical admission with T85.22XA as PDx + OR procedure	Groups to DRG 116 (with CC/MCC) vs DRG 117 (without)
T85.22XA as secondary dx on non-eye PDx with CC upgrade potential	May upgrade DRG from base to CC tier — confirm with CC exclusion list
T85.22XA as medical PDx + no OR procedure	DRG 124 (with MCC) or DRG 125 (without MCC)

Inpatient DRG Groups

MS-DRG	Description	Trigger
116	Intraocular Procedures with CC/MCC	IOL repositioning/exchange/PPV performed inpatient + CC or MCC present
117	Intraocular Procedures without CC/MCC	Same OR procedures; no CC or MCC
124	Other Disorders of the Eye with MCC or Thrombolytic Agent	T85.22XA as medical PDx + MCC present
125	Other Disorders of the Eye without MCC	T85.22XA as medical PDx; no MCC

MDC: MDC 02 — Diseases and Disorders of the Eye

CPT Procedure Codes (Commonly Associated)

IOL displacement drives a rich set of surgical CPT codes depending on the degree of displacement, the surgical approach required, and whether exchange or repositioning is performed. Precise CPT selection is one of the most complex coding scenarios in all of ophthalmology.

Diagnostic Evaluation

CPT	Description	wRVU (approx.)	Notes
92004	Comprehensive ophthalmological exam, new patient	2.67	New referral for displaced IOL evaluation
92012	Intermediate ophthalmological exam, established	0.97	Follow-up IOL position monitoring
92014	Comprehensive ophthalmological exam, established	1.50	Dilated exam with IOL position documentation
92132	OCT anterior segment	0.58	IOL tilt, decentration, capsular bag assessment
92134	OCT posterior segment	0.58	Rule out concurrent RD, CME in posteriorly displaced IOL
76519	Ophthalmic biometry with IOL power calculation	0.77	Pre-exchange power calculation — T85.22XA is a CMS-covered diagnosis
92136	Ophthalmic biometry, optical coherence	1.36	IOLMaster/Lenstar for IOL power calc pre-exchange
92286	Specular microscopy with/without photography	0.62	Endothelial cell count before exchange — especially anterior dislocation
92235	Fluorescein angiography	1.10	If concurrent CME, retinal ischemia suspected

IOL Repositioning (No Exchange — IOL Repositioned and Retained)

When the displaced IOL is surgically repositioned into a better position without being exchanged:

CPT	Description	wRVU (approx.)	Assistant Allowed?	Global Period	Notes
66825	Repositioning of intraocular lens prosthesis, requiring an incision (separate procedure)	~6.98	No	90 days	IOL repositioned surgically; IOL retained; used for subluxation, iris capture, mild dislocation
66682	Suture of iris, ciliary body with retrieval of suture through small incision	~9.25	No	90 days	IOL suture fixation to iris or ciliary body for sulcus repositioning; suture placed and retrieved through paracentesis

66825 — “separate procedure” designation: CPT 66825 carries the descriptor “separate procedure” — a designation indicating it is typically part of a larger service but can be billed independently when performed alone. If 66825 is performed concurrently with another major ophthalmic procedure (e.g., PPV), it may be bundled by some payers under NCCI edits. Always verify NCCI edits and payer policy when billing 66825 alongside 67036.

66682 for suture fixation: When the displaced IOL is repositioned using suture fixation techniques (suture to iris, suture to ciliary body in the sulcus via Siepser sliding knot, McCannel suture, or similar), CPT 66682 is the correct code — not 66825. The suture retrieval through a small incision is the defining element of 66682.

IOL Exchange (Displaced IOL Removed and Replaced)

When the displaced IOL is surgically removed and a new IOL is implanted:

CPT	Description	wRVU (approx.)	Assistant Allowed?	Global Period	Notes
66986	Exchange of intraocular lens	~14.56	No	90 days	IOL removed and NEW IOL implanted in same session; most common for subluxated or dislocated IOL requiring exchange rather than repositioning

Modifier -78 if within global period: If 66986 is performed within the 90-day global period of the original cataract surgery (66984, 66982), Modifier -78 (unplanned return to OR) is required. This reduces reimbursement to the intraoperative component only (~70%) since the global period of the primary surgery covers pre- and post-operative services.

IOL Removal Without Replacement (Leaving Aphakia)

When the displaced IOL is removed but no new IOL is inserted at that session:

CPT	Description	wRVU (approx.)	Assistant Allowed?	Notes
65920	Removal of implanted material, anterior segment of eye	~8.45	No	IOL removed from anterior segment (anterior chamber, capsular bag, sulcus); patient left aphakic
67121	Removal of implanted material, posterior segment; intraocular	~12.71	No	IOL (or IOL fragment) retrieved from vitreous cavity; posterior segment approach

65920 vs 67121 — location governs code selection: When the displaced IOL is in the anterior segment (anterior chamber, subluxated in the capsular bag/sulcus) and removed from that location, use 65920. When the IOL has fallen into the vitreous cavity and must be retrieved via a posterior segment approach (PPV incisions), use 67121. Do NOT report 65920 and 67121 together for the same IOL — the approach determines which code is appropriate.

67121 and 67036 bundling: CPT 67121 (removal of posterior segment implanted material) IS bundled with CPT 67036 (pars plana vitrectomy) under NCCI edits — they cannot be reported together for the same eye in the same session. When PPV is performed to retrieve a posteriorly dislocated IOL, report 66986 (if new IOL placed) or 65920/67121 based on approach, but NOT 67121 + 67036 together.

Secondary IOL Implantation (After Aphakia Established at a Prior Encounter)

When a new IOL is inserted at a separate encounter after the original IOL was removed:

CPT	Description	wRVU (approx.)	Assistant Allowed?	Notes
66985	Insertion of IOL prosthesis (secondary implant), not associated with concurrent cataract removal	~14.33	No	Secondary IOL after aphakia established from prior IOL removal

Scleral-Fixated IOL Techniques (When Capsular Support Is Absent)

When the displaced IOL-bag complex is entirely removed and a new IOL must be fixated without capsular support, scleral fixation techniques are employed:

CPT	Description	wRVU (approx.)	Assistant Allowed?	Notes
66986	Exchange of intraocular lens	~14.56	No	Reports the IOL exchange; scleral fixation technique is included in 66986 when new IOL is sutured/fixated to sclera in same session
66682	Suture of iris, ciliary body; retrieval of suture through small incision	~9.25	No	When suture passes through iris or ciliary body for fixation

Note

No separate CPT for specific scleral fixation technique: There is no CPT code that specifically describes the scleral fixation approach (Gore-Tex suture externalization, flanged haptic intrascleral fixation [Yamane technique], glued IOL). These techniques are considered included within the primary IOL implantation/exchange CPT code (66985, 66986). Report 66986 for the IOL exchange plus scleral fixation in the same session; do not add an additional CPT for the fixation technique itself.

Concurrent Pars Plana Vitrectomy

When IOL displacement requires concurrent posterior segment intervention:

CPT	Description	wRVU (approx.)	Assistant Allowed?	Notes
67036	Pars plana vitrectomy	~21.46	No	PPV performed for posterior segment management; complex posterior IOL dislocation often requires PPV as part of the surgical approach
67041	PPV with membrane peel	~17.60	Yes	If ERM concurrently present and peeled
67108	Repair of retinal detachment with vitrectomy	~28.27	Yes	Concurrent RD repair if retinal detachment is present alongside IOL dislocation

66986 + 67036 — NOT bundled: Unlike 67121 + 67036 (which ARE bundled), CPT 66986 and 67036 are NOT bundled under NCCI and can be reported together in the same session for the same eye when medically necessary. This is the standard coding for combined IOL exchange + PPV for posteriorly dislocated IOL with vitreoretinal involvement. Each code must be linked to its specific supporting diagnosis: 66986 → T85.22XA; 67036 → the retinal/vitreous diagnosis.

Episcleral/Intravitreal Procedures (Concurrent)

CPT	Description	wRVU (approx.)	Assistant Allowed?	Notes
67028	Intravitreal injection	~1.60	No	If anti-VEGF or steroid injected concurrently for CME after IOL displacement management
67107	Repair of retinal detachment; scleral buckle	~24.14	No	If scleral buckle required alongside posterior IOL dislocation repair

E/M and Consultation Services

CPT	Description	wRVU (approx.)	Notes
99205	New patient office visit, high complexity	3.50	New referral for IOL dislocation — complex decision-making
99215	Established patient, high complexity	2.80	Complex IOL displacement management
99213-99214	Office visit, low-moderate complexity	0.97-1.50	Routine post-operative follow-up
99223	Initial hospital care, high complexity	3.86	Inpatient admission for complex posterior IOL dislocation
99233	Subsequent hospital care, high complexity	1.39	Post-operative inpatient rounds

Assistant Surgeon Summary

Procedure	Assistant Allowed?
IOL repositioning (66825)	No
IOL suture fixation (66682)	No
IOL exchange (66986)	No
IOL removal, anterior (65920)	No
IOL removal, posterior (67121)	No
Secondary IOL implantation (66985)	No
Pars plana vitrectomy (67036)	No
PPV with membrane peel (67041)	Yes
PPV with RD repair (67108)	Yes
Scleral buckle (67107)	No
All diagnostic services and E/M	No

Coding Examples

Example 1 — Acute Posterior IOL Dislocation, PPV + IOL Exchange

Clinical Scenario:
A 76-year-old male with pseudoexfoliation syndrome presents with sudden loss of vision OD. Dilated exam reveals complete posterior dislocation of the in-the-bag IOL-capsular complex into the vitreous cavity OD. The IOL is resting on the inferior retina. He is taken emergently to the OR for pars plana vitrectomy, removal of the dislocated IOL-bag complex from the posterior segment, and placement of a new scleral-fixated IOL (Yamane intrascleral flanged haptic technique).

ICD-10-CM:

T85.22XA — Displacement of intraocular lens, initial encounter (posterior IOL dislocation — the mechanical complication driving the encounter)
H40.1391 — Pseudoexfoliation glaucoma, right eye (underlying cause of zonular loss — additional code; carries HCC weight if applicable)

CPT:

67036-RT — Pars plana vitrectomy, right eye (for vitreous work and IOL retrieval from posterior segment; linked to concurrent vitreous diagnosis)
66986-RT — Exchange of intraocular lens, right eye (IOL removal + new scleral-fixated IOL placement; linked to T85.22XA)

CPT 66986 + 67036 are NOT bundled — both can be reported together. Link 66986 to T85.22XA and 67036 to the vitreous/retinal diagnosis (H43.392 or concurrent diagnosis). Do NOT add 67121 — it is bundled with 67036 and cannot be reported together.

Example 2 — Late IOL Subluxation with Iris Capture, Surgical Repositioning

Clinical Scenario:
A 68-year-old female presents with monocular diplopia and glare OS for 2 weeks. She had cataract surgery OS 4 years ago. Slit-lamp exam reveals IOL optic prolapsed anteriorly through the pupil (iris capture), with the inferior edge of the optic visible in the anterior chamber. The IOL haptics are still partially in the sulcus. Pharmacologic dilation is attempted but fails to release the IOL. She is taken to the OR for surgical repositioning via 66825.

ICD-10-CM:

T85.22XA — Displacement of intraocular lens, initial encounter (iris capture = IOL displaced from intended position)

CPT:

66825-LT — Repositioning of intraocular lens prosthesis, requiring incision, left eye (IOL repositioned and retained — no exchange performed)

Example 3 — Toric IOL Rotation, IOL Repositioning

Clinical Scenario:
A 55-year-old male had toric IOL implantation OD 6 weeks ago with initial excellent visual outcome and excellent astigmatism correction. He now presents with recurrent astigmatism OD. Slit-lamp exam confirms the toric IOL has rotated 25° off the intended axis. The provider documents “toric IOL malposition/displacement OD.” The patient is taken back to the OR for IOL rotation to the correct axis.

ICD-10-CM:

T85.22XA — Displacement of intraocular lens, initial encounter (toric IOL rotational malposition — displacement from intended meridional position)

CPT:

66825-RT-78 — Repositioning of IOL prosthesis, requiring incision, right eye, with Modifier -78 (return to OR within 90-day global period of original cataract surgery)

Modifier -78 is required — the toric IOL rotation occurred within 90 days of the original cataract surgery (66984). Modifier -78 designates this as an unplanned return to the OR for a related procedure during the global period, reducing payment to the intraoperative component.

Example 4 — In-the-Bag IOL Complex Dislocation, PXF, IOL Exchange + PPV + Phakic Fellow Eye Caution

Clinical Scenario:
A 79-year-old female with bilateral pseudoexfoliation presents for evaluation of gradual vision decline OD over 6 months. Dilated exam reveals inferior subluxation of the entire IOL-capsular bag complex OD with visible zonular dehiscence extending from 5 to 9 o’clock. The IOL is still in the anterior segment but tilted approximately 15°. She is taken to the OR for PPV-assisted IOL-bag complex removal and placement of a new Gore-Tex suture scleral-fixated IOL.

ICD-10-CM:

T85.22XA — Displacement of intraocular lens, initial encounter (IOL-bag complex subluxation/dislocation OD)
H40.1391 — Pseudoexfoliation glaucoma, right eye, stage unspecified (underlying etiology — additional)

CPT:

67036-RT — PPV, right eye (posterior segment approach for IOL-bag complex removal)
66986-RT — Exchange of intraocular lens, right eye (IOL removal + new scleral-fixated IOL; not bundled with 67036)

Fellow eye coding note: PXF is bilateral in a high percentage of patients. If the fellow eye (OS) is evaluated and the provider documents pseudoexfoliation with zonular instability or subluxation of the OS IOL, T85.22XA applies to OS as well — though there is no laterality modifier on T85.22XA itself, document laterality clearly in the clinical note and use bilateral billing modifiers (Modifier -50 or bilateral RT/LT modifiers per payer policy when both eyes are treated).

Example 5 — Anterior Chamber Migration of PCIOL, Corneal Decompensation

Clinical Scenario:
A 72-year-old male presents with painful, cloudy vision OS for 3 days. He has a history of cataract surgery OS 12 years ago. Slit-lamp exam shows the posterior chamber IOL has dislocated anteriorly into the anterior chamber with the IOL directly touching the corneal endothelium. The cornea shows significant stromal and microcystic epithelial edema (bullous keratopathy developing). He is taken urgently to the OR for IOL removal (65920-LT) and secondary anterior chamber IOL implantation (66985-LT).

ICD-10-CM:

T85.22XA — Displacement of intraocular lens, initial encounter (anterior chamber migration of PCIOL)
H18.12 — Bullous keratopathy, left eye (corneal decompensation from IOL-endothelial touch — additional; codes separately as the concurrent complication)

CPT:

65920-LT — Removal of implanted material, anterior segment (IOL removed from anterior chamber position)
66985-LT-51 — Insertion of IOL prosthesis, secondary implant (new ACIOL placed after removal; Modifier -51 multiple procedures)

Example 6 — Posterior IOL Dislocation with Concurrent Retinal Detachment

Clinical Scenario:
A 65-year-old female presents with sudden total visual loss OS. She has a history of cataract surgery OS 5 years ago and high myopia. Exam reveals a completely posteriorly dislocated IOL resting on an inferior rhegmatogenous retinal detachment OS. She undergoes combined PPV, IOL retrieval, retinal detachment repair with laser and gas tamponade, and scleral-fixated IOL placement.

ICD-10-CM:

T85.22XA — Displacement of intraocular lens, initial encounter (IOL posterior dislocation)
H33.002 — Unspecified retinal detachment with retinal break, left eye (concurrent RD — additional; separate pathology)

CPT:

67108-LT — Repair of retinal detachment with vitrectomy, left eye (PPV + RD repair)
66986-LT — Exchange of intraocular lens, left eye (IOL removal + new scleral-fixated IOL; linked to T85.22XA)

67108 vs 67036 — when RD and IOL dislocation coexist: When retinal detachment repair is the dominant surgical indication and PPV is being performed primarily for the RD, report 67108 (PPV + RD repair) rather than 67036 (PPV alone), as 67108 represents the higher-complexity procedure. Report 66986 separately for the IOL exchange component — these two CPTs are not bundled.

Example 7 — Post-Repair Subsequent Encounter

Clinical Scenario:
Same patient as Example 1. Returns 4 weeks after successful PPV + scleral-fixated IOL placement OD. Visual acuity is 20/40 OD and improving. IOL is well centered and stable. No complications.

ICD-10-CM:

T85.22XD — Displacement of intraocular lens, subsequent encounter (7th character switches to “D” — active treatment complete, now in routine healing/recovery phase)
Z96.1 — Presence of intraocular lens (pseudophakia — Z96.1 resumes now that the new IOL is in correct position and functioning normally)

CPT:

92014-RT — Comprehensive ophthalmological exam, established patient

Z96.1 resumes at subsequent encounters: Once the IOL displacement has been surgically corrected and the new/repositioned IOL is functioning in the correct position, the Excludes1 relationship is no longer triggered. Z96.1 is again the appropriate code to reflect the patient’s pseudophakic status.

Key Coding Pitfalls & Tips

“XX” placeholders are mandatory. The complete valid code is T85.22XA — never T85.22A. Positions 4 and 5 must contain X placeholders. Omitting them produces an invalid, non-billable code.
T85.22XA is only for displaced artificial IOLs, NOT natural lens dislocation. Natural crystalline lens subluxation or dislocation (Marfan, trauma, ectopia lentis) is coded H27.1-. This is one of the most common and consequential coding errors in ophthalmology — the wrong code (H27.1- vs T85.22XA) can trigger claim denials and medical necessity reviews.
T85.22XA and Z96.1 are Excludes1 — mutually exclusive during active displacement. While the IOL is out of position, Z96.1 cannot be coded. After correction, Z96.1 resumes at subsequent visits.
7th character “A” persists throughout the entire active treatment episode. Using “D” at the surgical encounter or pre-op visit is incorrect — “D” (subsequent) only applies after active treatment is complete and the patient is in the routine healing phase.
66986 + 67036 are NOT bundled — 67121 + 67036 ARE bundled. This is a critical CPT bundling distinction. When combined PPV and IOL exchange are performed for a posteriorly dislocated IOL, report 66986 + 67036 (not bundled, both separately reimbursable). Never report 67121 + 67036 for the same eye in the same session — they are bundled under NCCI edits.
66825 carries a “separate procedure” designation. When IOL repositioning (66825) is performed concurrently with PPV (67036), some payers may bundle 66825 into 67036. Verify NCCI edits and payer policy; consider whether 66986 (exchange) better describes the encounter if the entire IOL management — not just a simple reposition — was performed.
Modifier -78 when within global period. IOL repositioning or exchange within the 90-day global period of cataract surgery always requires Modifier -78. Without it, the claim will be denied as falling within the global period of the primary procedure.
T85.22XA is a CC — document and code it as secondary when applicable. When a patient is admitted inpatient with T85.22XA as a secondary diagnosis alongside another primary condition, coding T85.22XA may upgrade the DRG from base to CC tier. Ensure the provider has documented the IOL displacement as an active clinical concern being managed during the inpatient stay.
Both T85.22XA and T85.21XA can be reported when the IOL is both displaced AND broken. In complex posterior IOL dislocation cases where the IOL was found to be both out of position (T85.22XA) and fractured/damaged (T85.21XA) — for example, a posteriorly dislocated PMMA IOL with a fractured haptic — both codes may be appropriate if both conditions are documented.

Code	Description
T85.22XD	Displacement of intraocular lens, subsequent encounter
T85.22XS	Displacement of intraocular lens, sequela
T85.21XA	Breakdown (mechanical) of intraocular lens, initial encounter — IOL structurally broken
T85.29XA	Other mechanical complication of IOL, initial encounter
T85.79XA	Infection/inflammatory reaction due to other internal prosthetic devices
Z96.1	Presence of intraocular lens — Excludes1 with T85.22XA during active displacement; resumes after correction
H27.11	Subluxation of lens, right eye — natural crystalline lens subluxation
H27.12	Subluxation of lens, left eye
H27.131	Dislocation of lens, anterior, right eye
H27.132	Dislocation of lens, anterior, left eye
H26.491	PCO right eye — may be concurrent with or precede IOL displacement
H26.492	PCO left eye
H33.001	Retinal detachment with retinal break, right eye — may coexist with IOL dislocation
H33.002	Retinal detachment with retinal break, left eye
H18.12	Bullous keratopathy, left eye — from anterior IOL-endothelial touch
H18.11	Bullous keratopathy, right eye
H40.1391	Pseudoexfoliation glaucoma, right eye — leading cause of late IOL dislocation
H40.1392	Pseudoexfoliation glaucoma, left eye
Q87.40	Marfan syndrome, unspecified — systemic cause of zonular weakness
H43.392	Other vitreous opacities — concurrent vitreous involvement
H59.031	CME following cataract surgery, right eye — may coexist
Z98.41	Cataract extraction status, right eye
Z98.42	Cataract extraction status, left eye
H27.01	Aphakia, right eye — post-IOL removal without replacement
H27.02	Aphakia, left eye

Last Reviewed: 2026-02-18 | Source: ICD-10-CM FY2025, CMS MPFS, CMS MS-DRG v42.0, CMS Billing and Coding: Ophthalmic Biometry for IOL Power Calculation (A56549), Retina Today Complicated Coding Cases, Ophthalmology Management Coding References, AAPC Ophthalmology Coding Alert, ICD-10-CM Official Coding Guidelines FY2026, NCCI Policy Manual

Explorer

T85.22XA

T85.22XA — Displacement of Intraocular Lens, Initial Encounter

Code Overview

Full Code Description

Clinical Description

What Is IOL Displacement?

IOL Positional Anatomy

Risk Factors and Causes of IOL Displacement

Grades and Types of IOL Displacement

Clinical Presentation

Diagnosis and Workup

7th Character Table

Code Structure / Code Tree

Includes / Excludes Notes

Includes (T85.22 — Displacement of IOL)

Excludes1 at T85.22 — Mutually Exclusive

Excludes2 at T85 Category — Can Code Together When Both Present

Code Also Instructions

Critical Note: T85.22XA vs H27.1- (Natural Lens Dislocation)

HCC (Hierarchical Condition Category) Mapping

MS-DRG Mapping (Inpatient)

CC/MCC Status

Inpatient DRG Groups

CPT Procedure Codes (Commonly Associated)

Diagnostic Evaluation

IOL Repositioning (No Exchange — IOL Repositioned and Retained)

IOL Exchange (Displaced IOL Removed and Replaced)

IOL Removal Without Replacement (Leaving Aphakia)

Secondary IOL Implantation (After Aphakia Established at a Prior Encounter)

Scleral-Fixated IOL Techniques (When Capsular Support Is Absent)

Concurrent Pars Plana Vitrectomy

Episcleral/Intravitreal Procedures (Concurrent)

E/M and Consultation Services

Assistant Surgeon Summary

Coding Examples

Example 1 — Acute Posterior IOL Dislocation, PPV + IOL Exchange

Example 2 — Late IOL Subluxation with Iris Capture, Surgical Repositioning

Example 3 — Toric IOL Rotation, IOL Repositioning

Example 4 — In-the-Bag IOL Complex Dislocation, PXF, IOL Exchange + PPV + Phakic Fellow Eye Caution

Example 5 — Anterior Chamber Migration of PCIOL, Corneal Decompensation

Example 6 — Posterior IOL Dislocation with Concurrent Retinal Detachment

Example 7 — Post-Repair Subsequent Encounter

Key Coding Pitfalls & Tips

Related Codes (Cross-Reference)

Graph View

Table of Contents

Recent Notes