Crystal's MCW Coder HubH59.093 — Other Disorders of the Eye following Cataract Surgery, Bilateral
Code Overview
H59.093 is a billable ICD-10-CM diagnosis code for other disorders of the eye following cataract surgery, bilateral. It belongs to the H59.09 subcategory — “Other disorders of the eye following cataract surgery” — and is the bilateral form of the NEC residual bucket within the H59 category for intraoperative and postprocedural complications and disorders of the eye and adnexa, not elsewhere classified.
Like H59.091 (right eye) and H59.092 (left eye), this is a “not elsewhere classified” (NEC) residual code. It is only appropriate when both eyes have a post-cataract complication or disorder that is clearly attributable to cataract surgery but does not map to any of the more specific bilateral H59.0 codes (H59.003 — vitreous syndrome bilateral, H59.013 — bullous keratopathy bilateral, H59.023 — lens fragments bilateral, H59.033 — CME bilateral). Specificity must always be exhausted before defaulting to H59.093.
Full Code Description
| Element | Detail |
|---|---|
| Full Code | H59.093 |
| Description | Other disorders of the eye following cataract surgery, bilateral |
| NEC Designation | Yes — “not elsewhere classified” residual code |
| Billable | Yes |
| Chapter | 7 — Diseases of the Eye and Adnexa (H00-H59) |
| Block | H55-H59 — Other disorders of eye and adnexa |
| Category | H59 — Intraoperative and postprocedural complications/disorders of eye and adnexa, NEC |
| Laterality | Bilateral (OU) |
| 7th Character | Not applicable — 5-character billable code, complete as written |
| Valid FY | FY2025 (Oct 1, 2024 - Sep 30, 2025) |
Clinical Description
H59.093 is a residual, bilateral NEC code — meaning it captures any post-cataract disorder or complication simultaneously affecting both eyes that does not have a more precise ICD-10-CM home within the H59.0 subcategory. The bilateral nature of this code implies the patient has undergone cataract surgery on both eyes (staged sequentially or, in rare cases, simultaneously), and the same unspecified post-cataract complication affects both.
Why Bilateral Post-Cataract Complications Occur
Bilateral post-cataract complications arise in the context of:
-
Sequential bilateral cataract surgery (the norm in the US) — typically spaced weeks to months apart; a complication that develops in the first eye may recur or manifest in the second eye, particularly if the mechanism (systemic disease, surgical technique, irrigation solutions, or OVD products) is the same
-
Immediate sequential bilateral cataract surgery (ISBCS) — both eyes operated on the same day; rare in the US but practiced internationally; bilateral complications from ISBCS (e.g., bilateral TASS) represent a specific patient safety concern
-
High-risk systemic conditions — diabetes, autoimmune diseases, and uveitic conditions predispose both eyes equally to postoperative complications
-
Shared procedural factors — same surgeon, equipment, irrigation solutions, or OVD can produce bilateral TASS, bilateral IOP spikes, or bilateral corneal edema patterns
Conditions That May Appropriately Map to H59.093
The following types of clinical scenarios may legitimately be coded to H59.093 when both eyes are affected and no more specific bilateral H59 code exists:
Bilateral TASS (Toxic Anterior Segment Syndrome):
A non-infectious, sterile postoperative inflammatory reaction occurring within 12-72 hours following intraocular surgery, caused by non-infectious substances entering the anterior segment. TASS has been documented as a bilateral event particularly following ISBCS or when contaminated irrigation solutions, enzymatic cleaners, or OVD batches affect multiple consecutive surgical cases — including both eyes of the same patient. There is no specific ICD-10-CM code for TASS; H59.093 is the correct bilateral residual code.
Bilateral post-cataract IOP spikes:
Transient or sustained IOP elevation following cataract surgery in both eyes from retained viscoelastic, inflammation, or steroid response. When the elevation is documented as a direct post-cataract complication in both eyes but does not meet the threshold of diagnosable glaucoma (H40.-), H59.093 is appropriate.
Bilateral post-cataract wound complications:
Wound dehiscence, incision leak, or filtering bleb formation simultaneously or sequentially in both eyes following cataract surgery, when no more specific wound complication code (T81.3-) better captures the situation.
Bilateral post-cataract anterior segment inflammation NEC:
Persistent bilateral postoperative anterior chamber reaction not meeting H20.- (iridocyclitis/uveitis) criteria and not caused by a specific diagnosable inflammatory condition, attributed to the cataract surgery itself.
Bilateral post-cataract corneal edema (without bullous keratopathy):
Mild-to-moderate bilateral corneal edema following cataract surgery that does not meet the clinical threshold of “bullous aphakic keratopathy” (H59.013). Earlier or less severe bilateral corneal edema presentations may be captured here.
Bilateral post-cataract hypotony:
IOP persistently below normal (< 5 mmHg) in both eyes following cataract surgery, with associated choroidal folds or maculopathy, documented as a post-surgical bilateral complication.
Bilateral post-cataract pupillary abnormalities:
Iris damage, pupil distortion (corectopia), or iris prolapse affecting both eyes as a result of phacoemulsification technique or complications in sequential surgeries.
Bilateral post-cataract posterior segment complications NEC:
Any bilateral posterior segment complication attributable to cataract surgery that does not meet the CME threshold (H59.033) or other specifically coded conditions.
Code Structure / Code Tree
H00-H59 Diseases of the Eye and Adnexa
└── H55-H59 Other disorders of eye and adnexa
└── H59 Intraoperative and postprocedural complications and disorders of eye and adnexa, NEC
└── H59.0 Disorders of the eye following cataract surgery
├── H59.00 Vitreous (touch) syndrome
│ ├── [[H59.001]] ... right eye
│ ├── [[H59.002]] ... left eye
│ ├── [[H59.003]] ... bilateral
│ └── [[H59.009]] ... unspecified
├── H59.01 Keratopathy (bullous aphakic) following cataract surgery
│ ├── [[H59.011]] ... right eye
│ ├── [[H59.012]] ... left eye
│ ├── [[H59.013]] ... bilateral
│ └── [[H59.019]] ... unspecified
├── H59.02 Cataract (lens) fragments in eye following cataract surgery
│ ├── [[H59.021]] ... right eye
│ ├── [[H59.022]] ... left eye
│ ├── [[H59.023]] ... bilateral
│ └── [[H59.029]] ... unspecified
├── H59.03 Cystoid macular edema following cataract surgery
│ ├── [[H59.031]] ... right eye
│ ├── [[H59.032]] ... left eye
│ ├── [[H59.033]] ... bilateral
│ └── [[H59.039]] ... unspecified
└── H59.09 Other disorders of the eye following cataract surgery ◄ NEC SUBCATEGORY
├── [[H59.091]] ... right eye
├── [[H59.092]] ... left eye
├── H59.093 ... bilateral ◄ THIS CODE
└── [[H59.099]] ... unspecified eye
Note
NEC residual logic: Always work from the most specific code outward. Before assigning H59.093, verify the bilateral post-cataract condition cannot be captured by H59.003, H59.013, H59.023, H59.033, or a body-system-specific bilateral code (e.g., H20.13, H40.43-, H18.23, H44.43).
Includes / Excludes Notes
Includes (H59.09 — Bilateral Context)
Any bilateral disorder of the eye directly following and attributable to cataract surgery in both eyes that is not captured by:
-
H59.003 — Vitreous touch syndrome, bilateral
-
H59.013 — Bullous aphakic keratopathy, bilateral
-
H59.023 — Cataract lens fragments, bilateral
-
H59.033 — Cystoid macular edema, bilateral
Conditions potentially captured bilaterally:
-
Bilateral TASS
-
Bilateral post-cataract IOP spikes (without glaucoma diagnosis)
-
Bilateral post-cataract anterior segment inflammation NEC
-
Bilateral post-cataract wound complications NEC
-
Bilateral post-cataract corneal edema (not meeting bullous keratopathy threshold)
-
Bilateral post-cataract hypotony
-
Bilateral pupillary/iris complications from surgery
-
Bilateral post-cataract posterior segment NEC
Excludes1 (H59 Category — Do Not Code Together When These Are the True Primary Problem)
| Code | Description | Rationale |
|---|---|---|
| T85.2 | Mechanical complication of intraocular lens | IOL mechanical issues = T85.2, not H59.093 |
| T85.3 | Mechanical complication of other ocular prosthetic devices, implants and grafts | Device-specific mechanical failure |
| Z96.1 | Pseudophakia | Status/history code only; not a complication code |
| H26.4- | Secondary cataracts (PCO, Soemmering’s ring) | PCO has its own coding pathway at H26.4-; do not default to H59.093 for bilateral PCO |
Key Comparators (Not Excludes1 — But Check These First)
| Code | Description | Versus H59.093 |
|---|---|---|
| H26.43 | Soemmering’s ring, bilateral | Secondary cataract — code here, not H59.093 |
| H26.493 | Other secondary cataracts, bilateral | PCO bilateral — code here, not H59.093 |
| H40.43X_ | Glaucoma secondary to eye inflammation, bilateral | If IOP elevation meets glaucoma criteria — code H40.43 |
| H20.13 | Chronic iridocyclitis, bilateral | If bilateral uveitis meets H20 criteria — code H20 |
| H59.033 | Cystoid macular edema, bilateral | If CME is the complication — code H59.033 instead |
| H59.013 | Bullous keratopathy, bilateral | If bullous keratopathy — code H59.013 instead |
HCC (Hierarchical Condition Category) Mapping
H59.093 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 |
HCC opportunity note:
When bilateral post-cataract complications occur in a patient with diabetes, autoimmune conditions, or other HCC-relevant systemic disease, always capture those underlying conditions with their specific codes (e.g., E11.3- for diabetes with ophthalmic complications, M05.- for rheumatoid arthritis) when documented as monitored or managed during the encounter.
MS-DRG Mapping (Inpatient)
H59.093 as principal diagnosis for an inpatient admission is extremely rare. If coded as PDx:
| MS-DRG | Description | Trigger |
|---|---|---|
| 124 | Other Disorders of the Eye with MCC | H59.093 as PDx + qualifying MCC present |
| 125 | Other Disorders of the Eye without MCC | H59.093 as PDx, no MCC |
MDC: MDC 02 — Diseases and Disorders of the Eye
CC/MCC Status:
-
H59.093 is not classified as a CC or MCC
-
Will not independently upgrade DRG assignment when present as a secondary diagnosis
-
When bilateral TASS or severe bilateral IOP complications necessitate inpatient admission, the level of clinical documentation should support the complexity even when the DRG does not automatically reflect it
CPT Procedure Codes (Commonly Associated)
As with all H59.09x codes, the CPTs vary based on the specific documented complication. Common procedure pairings include:
Evaluation and Management
| CPT | Description | wRVU (approx.) |
|---|---|---|
| 92004 | Comprehensive ophthalmological exam, new patient | 2.67 |
| 92014 | Comprehensive ophthalmological exam, established patient | 1.50 |
| 92012 | Intermediate ophthalmological exam, established patient | 0.97 |
| 99214 | Office visit, established patient, moderate complexity | 1.92 |
| 99215 | Office visit, established patient, high complexity | 2.80 |
Diagnostic Testing
| CPT | Description | wRVU (approx.) | Notes |
|---|---|---|---|
| 92134 | OCT posterior segment (bilateral) | 0.58 | Bill bilaterally per payer rules; document both eyes in report |
| 92132 | OCT anterior segment (bilateral) | 0.58 | Useful for corneal edema, wound integrity, anterior chamber evaluation |
| 92100 | Serial tonometry (bilateral) | 0.50 | IOP spike monitoring post-cataract |
| 76514 | Corneal pachymetry (bilateral) | 0.58 | For bilateral corneal edema thickness documentation |
| 92235 | Fluorescein angiography (bilateral) | 1.10 | When posterior segment complication suspected bilaterally |
| 92020 | Gonioscopy | 0.46 | Per eye; bilateral IOP elevation angle assessment |
Bilateral diagnostic billing note:
When diagnostic tests are performed bilaterally, confirm payer policy on how to report (modifier -50, separate line items with RT/LT, or standard bilateral code). Document both eyes individually in the interpretation report.
Therapeutic Procedures (Scenario-Dependent)
| CPT | Description | wRVU (approx.) | Assistant Allowed? |
|---|---|---|---|
| 68200 | Subconjunctival injection (periocular steroid) per eye | ~0.95 | No |
| 67500 | Retrobulbar injection (steroid), per eye | ~0.61 | No |
| 92310 | Fitting of contact lens (bandage), per eye | ~0.81 | No |
| 66821 | YAG laser posterior capsulotomy — note: PCO = H26.4-, not H59.093 | ~3.44 | No |
| 65930 | Removal of blood clot, anterior segment, per eye | ~5.09 | No |
Assistant Surgeon Payable?
| Service Category | Assistant Allowed? |
|---|---|
| Office evaluation (E/M, ophthalmological exams) | No |
| Diagnostic imaging and testing (OCT, FA, tonometry) | No |
| Minor office/clinical procedures (injections, BCL fitting) | No |
| Laser procedures | No |
| Major O.R. procedures (if escalation is required) | Verify per CPT and payer via MPFS indicator |
Coding Examples
Example 1 — Bilateral TASS Following Sequential Cataract Surgery
Clinical Scenario:
A 67-year-old male underwent phacoemulsification with IOL OS 3 days ago and OD 4 weeks prior. He presents with bilateral acute anterior chamber reaction, diffuse corneal edema OU, and IOP elevation. The cataract surgeon documents “toxic anterior segment syndrome (TASS), bilateral, following cataract surgery.” No infectious etiology is identified.
ICD-10-CM:
-
H59.093— Other disorders of the eye following cataract surgery, bilateral -
H18.23— Idiopathic corneal edema, bilateral (code also if separately documented)
CPT:
-
92014— Comprehensive ophthalmological exam, established patient -
92132-50— OCT anterior segment, bilateral (or as two separate line items per payer) -
68200-RT+68200-LT— Subconjunctival corticosteroid injection, right eye and left eye
Example 2 — Bilateral IOP Spike from Retained OVD
Clinical Scenario:
A 74-year-old female underwent sequential cataract surgery (OD 2 weeks ago, OS 1 day ago). She presents with IOP of 36 mmHg OD and 41 mmHg OS on post-op day 1. Both elevations are attributed to retained viscoelastic material by the surgeon, who documents “bilateral post-cataract IOP spike, OVD retention, OU.” No glaucoma diagnosis is made; the IOP normalizes by day 2.
ICD-10-CM:
H59.093— Other disorders of the eye following cataract surgery, bilateral
CPT:
-
92012— Intermediate ophthalmological exam -
92100— Serial tonometry (bilateral IOP measurement series)
Example 3 — Bilateral Post-Cataract Wound Leak
Clinical Scenario:
A 70-year-old patient had sequential cataract surgery OU. Both main incisions are noted to have a positive Seidel test at 48 hours post-op, indicating small bilateral wound leaks. Provider documents “bilateral post-cataract wound dehiscence, OU.” Bilateral bandage contact lenses are placed; both wounds seal without return to the OR.
ICD-10-CM:
-
H59.093— Other disorders of the eye following cataract surgery, bilateral -
T81.31XA— Disruption of external surgical wound, NEC, initial encounter (evaluate whether this or H59.093 better captures the wound disruption as PDx; sequence based on the primary reason for the encounter)
CPT:
-
92014— Comprehensive ophthalmological exam -
92132-50— OCT anterior segment (bilateral wound evaluation) -
92310-50— Fitting of bandage contact lens (bilateral)
Example 4 — Bilateral Post-Cataract Hypotony
Clinical Scenario:
A 65-year-old patient had bilateral cataract surgery (OD 2 weeks ago, OS 1 week ago). Both eyes show IOP of 3-4 mmHg with anterior chamber shallowing and early choroidal folds bilaterally. Provider documents “bilateral post-cataract hypotony with maculopathy, OU.”
ICD-10-CM:
-
H59.093— Other disorders of the eye following cataract surgery, bilateral -
H44.43— Hypotony of bilateral eyes (code also: the specific hypotony if documented independently)
CPT:
-
92014— Comprehensive ophthalmological exam -
92134-50— OCT posterior segment (bilateral choroidal fold documentation) -
92132-50— OCT anterior segment (anterior chamber depth evaluation, bilateral)
Example 5 — Bilateral vs. Unilateral Code Selection Mid-Course
Clinical Scenario:
Patient initially presents with bilateral post-cataract IOP spikes (H59.093). At follow-up 4 weeks later, the right eye IOP has normalized fully but the left eye continues to have elevated IOP. Provider now documents “post-cataract IOP spike, persistent, OS only.”
Updated ICD-10-CM (follow-up visit):
H59.092— Other disorders of the left eye following cataract surgery (update from H59.093 to H59.092 once only one eye remains affected)
Laterality update principle: Monitor laterality documentation at each encounter and update accordingly. H59.093 is appropriate only while both eyes remain actively affected by the documented post-cataract condition.
Key Coding Pitfalls & Tips
-
Always exhaust specificity before assigning H59.093. The bilateral specific codes H59.003, H59.013, H59.023, and H59.033 must be ruled out before using H59.093. Bilateral CME = H59.033, bilateral bullous keratopathy = H59.013, bilateral lens fragments = H59.023. Only true NEC conditions land at H59.093.
-
Do not use H59.093 for bilateral PCO. Posterior capsular opacification is classified at H26.4- (secondary cataracts) and is excluded from H59 by the Excludes1 note. Bilateral PCO = H26.493.
-
Do not use H59.093 for bilateral IOL complications. IOL dislocation, displacement, malposition, or opacification in both eyes belongs in T85.22- (bilateral mechanical complication of IOL), not H59.093.
-
Never code H59.091 + H59.092 together for bilateral. If both eyes have the same post-cataract NEC disorder, use H59.093 as the single bilateral code.
-
Avoid H59.099 when bilaterality is documented. H59.099 (unspecified eye) should never be used when the record clearly states both eyes are affected.
-
Update laterality at each encounter. If bilateral resolves to unilateral between visits, move to H59.091 or H59.092 as appropriate and document the change.
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TASS bilateral is a patient safety event. Bilateral TASS, especially following ISBCS, should be flagged in quality review systems. Accurate coding with H59.093 supports facility-level complication tracking and reporting.
-
Query the provider for specificity. When a note describes a post-cataract bilateral complication with vague terminology, query whether the condition matches a named, specifically indexed condition (TASS, hypotony, wound leak, IOP spike) before defaulting to H59.093.
Related Codes (Cross-Reference)
| Code | Description |
|---|---|
| H59.091 | Other disorders of the right eye following cataract surgery |
| H59.092 | Other disorders of the left eye following cataract surgery |
| H59.099 | Other disorders of unspecified eye following cataract surgery — avoid when laterality known |
| H59.003 | Vitreous touch syndrome, bilateral |
| H59.013 | Keratopathy (bullous aphakic) following cataract surgery, bilateral |
| H59.023 | Cataract (lens) fragments in eye following cataract surgery, bilateral |
| H59.033 | Cystoid macular edema following cataract surgery, bilateral |
| H26.43 | Soemmering’s ring, bilateral |
| H26.493 | Other secondary cataracts, bilateral |
| H40.433 | Glaucoma secondary to eye inflammation, bilateral, stage unspecified |
| H20.13 | Chronic iridocyclitis, bilateral |
| H18.23 | Idiopathic corneal edema, bilateral |
| H44.43 | Hypotony of bilateral eyes |
| T85.22XA | Displacement of intraocular lens, initial encounter — Excludes1 |
| Z96.1 | Pseudophakia — Excludes1; status code only |
| Z98.43 | Cataract extraction status, bilateral |
Last Reviewed: 2026-02-18 | Source: ICD-10-CM FY2025, CMS MPFS, AAO Cataract Surgery Coding Guidelines, ICD-10-CM Official Guidelines FY2026