Crystal's MCW Coder HubH59.031 — Cystoid Macular Edema following Cataract Surgery, Right Eye
Code Overview
H59.031 is a billable ICD-10-CM diagnosis code for cystoid macular edema following cataract surgery, right eye.aapc+1
This condition is also commonly known as Irvine-Gass syndrome or pseudophakic cystoid macular edema (PCME), one of the most common causes of visual loss after cataract surgery.eyewiki+2
Full Code Description
| Element | Detail |
|---|---|
| Full Code | H59.031 |
| Description | Cystoid macular edema following cataract surgery, right eye |
| Synonyms | Irvine-Gass syndrome, pseudophakic CME, postoperative CME, aphakic/pseudophakic macular edema |
| 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 and disorders of eye and adnexa, NEC |
| Laterality | Right eye |
Clinical Description
Cystoid macular edema (CME) following cataract surgery is characterized by swelling in the macula — the central part of the retina responsible for sharp, detailed vision. This postoperative complication typically develops due to inflammatory mediators causing breakdown of the blood-retinal barrier and leakage of fluid into the macula, creating a characteristic “petalloid” or cystoid pattern on imaging.
Key clinical features:
-
Onset: Typically presents 4-12 weeks after cataract surgery, though can occur earlier or later.
-
Symptoms: Painless decreased or blurred central vision, metamorphopsia (distorted vision, straight lines appearing wavy), micropsia, reduced color perception
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Risk factors: Older age, diabetes mellitus, uveitis, complicated cataract surgery (posterior capsule rupture, vitreous loss), prior macular edema, epiretinal membrane, pre-existing retinal vascular disease
Diagnosis:
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Optical coherence tomography (OCT) — demonstrates increased retinal thickness, intraretinal cysts, and subretinal fluid
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Fluorescein angiography — reveals classic petalloid leakage pattern
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Clinical examination — may show loss of foveal reflex, cystic changes (though often subtle on slit lamp)
Prognosis:
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Most cases of CME after uncomplicated cataract surgery are mild and self-limited, resolving spontaneously with observation
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Persistent or severe CME can lead to permanent vision impairment if untreated
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 syndrome
├── H59.01 Keratopathy (bullous aphakic) following cataract surgery
├── H59.02 Cataract (lens) fragments in eye following cataract surgery
└── H59.03 Cystoid macular edema following cataract surgery ◄ CATEGORY
├── H59.031 ... right eye ◄ THIS CODE
├── [[H59.032]] ... left eye
├── [[H59.033]] ... bilateral
└── [[H59.039]] ... unspecified eye
H59.0 subcategory includes diverse post-cataract complications: The H59.0 subcategory includes vitreous syndrome, bullous keratopathy, retained lens fragments, and cystoid macular edema — all distinct post-cataract complications requiring specific coding based on clinical documentation.
Includes / Excludes Notes
Includes (H59 Category)
-
Early postoperative complications specific to ophthalmic procedures
-
Post-cataract inflammatory complications affecting the eye and adnexa
Excludes1 (Do Not Code Together)
| Code | Description | Rationale |
|---|---|---|
| T85.2 | Mechanical complication of intraocular lens | If the primary issue is IOL mechanical complication rather than macular edema, code T85.2- instead |
| T85.3 | Mechanical complication of other ocular prosthetic devices, implants and grafts | Device-specific complications |
| Z96.1 | Pseudophakia | Status code; not a complication |
| H26.4- | Secondary cataracts (posterior capsular opacification) | Different post-cataract condition |
Instructional Notes
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Code first any underlying condition if documented as causal (e.g., diabetes with diabetic macular edema E11.311- if diabetic CME, though H59.031 is more specific for post-cataract CME)
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Use additional code for associated complications (e.g., ruptured posterior capsule during original surgery, if relevant)
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External cause codes: Not typically required as this is a postprocedural complication, not traumatic
HCC (Hierarchical Condition Category) Mapping
H59.031 does NOT map to a CMS-HCC in typical risk adjustment models.
| HCC Model | HCC Assignment | RAF Impact |
|---|---|---|
| CMS-HCC Model V28 | Not assigned | No RAF |
| RxHCC Model | Not assigned | No RAF |
| HHS-HCC (Marketplace) | Not assigned | No RAF |
Coding Tip:
While H59.031 itself generates no HCC weight, underlying conditions such as diabetes mellitus with complications (E11.3- series, which may map to HCCs) should be captured when documented and treated.
MS-DRG Mapping (Inpatient)
H59.031 is rarely a principal diagnosis for inpatient admission. CME is typically managed in the outpatient setting. However, if coded as PDx in an inpatient context:
| MS-DRG | Description | Trigger |
|---|---|---|
| 124 | Other Disorders of the Eye with MCC | H59.031 as PDx + MCC present |
| 125 | Other Disorders of the Eye without MCC | H59.031 as PDx, no MCC |
MDC: MDC 02 — Diseases and Disorders of the Eye
CC/MCC Status:
-
H59.031 is not classified as a CC or MCC in the MS-DRG system
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Inpatient admissions for isolated CME are uncommon; more likely scenario is CME as secondary diagnosis when patient is admitted for other reasons
CPT Procedure Codes (Commonly Associated)
Diagnostic Procedures
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 92134 | Scanning computerized ophthalmic diagnostic imaging (SCODI), posterior segment, with interpretation and report | 0.58 |
| 92235 | Fluorescein angiography (includes multiframe imaging) | 1.10 |
| 92240 | Indocyanine-green angiography (includes multiframe imaging) | 1.10 |
| 92201 | Ophthalmoscopy, extended, with retinal drawing | 1.10 |
Therapeutic Procedures
| CPT Code | Description | wRVU (approx.) | Assistant Allowed? |
|---|---|---|---|
| 67028 | Intravitreal injection of a pharmacologic agent | 1.60 | No |
| 67025 | Injection of vitreous substitute | 3.50 | No |
| 67221 | Destruction of chorioretinal lesion, photocoagulation (laser) | 5.20 | No |
| 67210 | Destruction of chorioretinal lesion, cryotherapy | 5.20 | No |
Evaluation and Management
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 92004 | Comprehensive ophthalmological exam, new patient | 2.67 |
| 92014 | Comprehensive ophthalmological exam, established patient | 1.50 |
| 99213 | Office visit, established patient, moderate complexity | 1.30 |
| 99214 | Office visit, established patient, moderate complexity | 1.92 |
| 99202 | Office visit, new patient, straightforward | 0.93 |
| 99203 | Office visit, new patient, low complexity | 1.60 |
wRVU Note:
Work RVU values are approximate based on current-year CMS Physician Fee Schedule. Always verify against the current MPFS for accurate billing.
Assistant Surgeon Payable?
| Procedure | Assistant Surgeon Allowed? |
|---|---|
| 67028 — Intravitreal injection | No — office-based procedure, not payable for assistant |
| 67025 — Injection of vitreous substitute | No — minor procedure |
| 92235/92240 — Angiography | No — diagnostic test |
| 92134 — OCT | No — diagnostic test |
| E/M codes (99202-99215, 92004, 92014) | No — evaluation services never support assistant |
Global Surgery Note:
Intravitreal injections (67028) carry a 10-day global period. If the injection is performed for CME within the global period of the original cataract surgery, modifier -78 (unplanned return to OR/procedure room) or -58 (staged/related procedure) may be required depending on circumstances.
Coding Examples
Example 1 — Classic Irvine-Gass Syndrome, Right Eye
Clinical Scenario:
A 68-year-old female presents 6 weeks after uncomplicated cataract surgery OD with complaints of blurry central vision. Visual acuity is 20/50 OD. OCT demonstrates cystoid macular edema with central subfield thickness of 420 µm. Diagnosis: pseudophakic cystoid macular edema (Irvine-Gass syndrome), right eye. Plan: initiate topical NSAID (bromfenac) and observe.
ICD-10-CM:
H59.031— Cystoid macular edema following cataract surgery, right eye
CPT:
-
92014— Comprehensive ophthalmological exam, established patient -
92134— OCT of posterior segment (bilateral or unilateral, as appropriate)
Example 2 — CME Requiring Intravitreal Injection
Clinical Scenario:
A 72-year-old male with diabetes presents 8 weeks post-cataract surgery OD with persistent CME despite 4 weeks of topical NSAID and steroid therapy. Visual acuity 20/80. OCT shows persistent cystoid changes. Decision made to proceed with intravitreal triamcinolone acetonide injection.
ICD-10-CM:
-
H59.031— Cystoid macular edema following cataract surgery, right eye -
E11.36— Type 2 diabetes mellitus with diabetic cataract (or E11.311 if diabetic macular edema also documented, though H59.031 takes precedence for post-cataract CME)
CPT:
-
92014— Comprehensive ophthalmological exam -
92134— OCT posterior segment -
67028— Intravitreal injection of pharmacologic agent -
J3300— Triamcinolone acetonide, injectable (HCPCS)
Note:
Example 3 — Complicated Cataract Surgery with CME and Retained Lens Fragments
Clinical Scenario:
A 65-year-old patient underwent complicated cataract surgery OD with posterior capsule rupture and vitreous loss. Now 3 weeks post-op with retained lens nuclear fragments in the vitreous cavity and CME. Referred for pars plana vitrectomy with lensectomy.
ICD-10-CM:
-
H59.021— Cataract (lens) fragments in eye following cataract surgery, right eye -
H59.031— Cystoid macular edema following cataract surgery, right eye -
H27.01— Aphakia, right eye (if IOL not placed due to complication)
CPT (surgical):
-
66850— Removal of lens material; phacofragmentation technique with aspiration (or 66852 if pars plana approach) -
67036— Pars plana vitrectomy (if extensive vitrectomy required) -
92134— OCT (if performed)
Coding Note: When both retained lens fragments (H59.02-) and CME (H59.03-) are present, both conditions should be coded as they represent distinct complications requiring different management approaches.retinatoday+1
Example 4 — Chronic/Persistent CME (Bilateral)
Clinical Scenario:
A 70-year-old patient underwent sequential cataract surgery OU. Now 4 months post-OD and 2 months post-OS with persistent bilateral CME requiring ongoing anti-VEGF injections.
ICD-10-CM:
H59.033— Cystoid macular edema following cataract surgery, bilateral
Important: Do NOT code H59.031 + H59.032 separately. Use H59.033 when both eyes are affected.findacode]
Key Coding Pitfalls & Tips
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Differentiate from diabetic macular edema: If the patient has diabetes and CME post-cataract, H59.031 is the more specific code for the postoperative CME. Only use E11.311 if diabetic macular edema is the primary diagnosis unrelated to surgery.
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Laterality specificity: Avoid H59.039 (unspecified eye) when documentation clearly identifies the right eye. Use H59.031 for specificity.
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Bilateral coding: Use H59.033 for bilateral involvement rather than coding H59.031 + H59.032 separately.
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Global period considerations: Intravitreal injections for CME within the cataract surgery global period require appropriate modifiers (-58 for staged/related, -78 for unplanned complication).
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Excludes1 compliance: Do not code H59.031 with secondary cataract (H26.4-) or IOL mechanical complications (T85.2-) as these are mutually exclusive conditions.
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Prophylaxis coding: Routine postoperative NSAID prophylaxis without diagnosed CME should not be coded as H59.031 — reserve this code for confirmed, diagnosed CME.