🧬 ICD-10 CM H35.063 — Retinal Vasculitis, Bilateral
Billable Code Confirmed
ICD-10 CM H35.063 is a fully specified, billable 6-character code: the fourth character (.0) places it within background retinopathy and retinal vascular changes, the fifth character (6) identifies retinal vasculitis specifically, and the sixth character (3) specifies bilateral involvement. Because both the specific inflammatory retinal condition and laterality are captured, no further specificity is required.
Non-Billable Parent Codes
H35 (other retinal disorders) — a chapter-level category code with no clinical specificity, never billable. H35.0 (background retinopathy and retinal vascular changes) — identifies the broad retinal vascular category but does not specify the particular vascular abnormality. H35.06 (retinal vasculitis) — identifies the specific inflammatory condition but omits laterality, so it requires a sixth character before it is billable.
Clinical Context
Selection of H35.063 over its unilateral siblings depends on confirmed bilateral involvement on dilated fundus exam and/or fluorescein angiography; because retinal vasculitis frequently signals an underlying systemic inflammatory or infectious process, documentation should also reflect any identified etiology (e.g., Behçet syndrome, sarcoidosis, multiple sclerosis) whenever established, since this drives both treatment selection and appropriate additional coding.
Code Classification
ICD-10 CM H35.063 is a diagnosis code (ICD-10-CM) representing an inflammatory ocular vascular condition, not a procedure code.
🔍 Code Description
ICD-10 CM H35.063 describes inflammation of the retinal vasculature — most often the retinal veins (periphlebitis) but potentially involving arterioles as well — affecting both eyes simultaneously. This condition can arise as an isolated idiopathic ocular process or as a manifestation of systemic inflammatory disease such as Behçet syndrome, sarcoidosis, systemic lupus erythematosus, or multiple sclerosis, as well as infectious etiologies including tuberculosis, syphilis, and viral infections; on fluorescein angiography, affected vessels typically show perivascular sheathing, vessel wall staining, and leakage. H35.063 is distinguished from unilateral presentations captured by H35.061 (right eye) and H35.062 (left eye), and from the broader background retinal vascular category represented by H35.013 (changes in retinal vascular appearance, bilateral), which describes non-inflammatory vascular findings rather than active vasculitis.
Clinically, bilateral retinal vasculitis carries greater urgency for systemic workup than unilateral disease, since bilateral involvement more strongly suggests an underlying systemic inflammatory or infectious process rather than a localized ocular event. Untreated or poorly controlled retinal vasculitis can progress to retinal ischemia, neovascularization, vitreous hemorrhage, and vision-threatening macular edema, which is why prompt fluorescein angiographic confirmation and, when indicated, systemic rheumatologic or infectious disease evaluation are central to the management pathway associated with this code.
🌳 Code Tree / Hierarchy
H35 Other retinal disorders ❌ Non-billable
│
├── H35.0 Background retinopathy and retinal vascular changes ❌ Non-billable
│ │
│ ├── H35.05 Retinal neovascularization, unspecified ❌ Non-billable (category)
│ │ └── H35.053 Retinal neovascularization, unspecified, bilateral ✅ Billable
│ │
│ ├── H35.06 Retinal vasculitis ❌ Non-billable (category)
│ │ │
│ │ ├── H35.061 Retinal vasculitis, right eye ✅ Billable
│ │ ├── H35.062 Retinal vasculitis, left eye ✅ Billable
│ │ ├── H35.063 Retinal vasculitis, bilateral ◀ THIS CODE ✅ Billable
│ │ └── H35.069 Retinal vasculitis, unspecified eye ✅ Billable
│ │
│ └── H35.07 Retinal telangiectasis ❌ Non-billable (category)
│ └── H35.073 Retinal telangiectasis, bilateral ✅ Billable
│
└── H35.3 Degeneration of macula and posterior pole ❌ Non-billableBilateral Findings Warrant Systemic Workup Documentation
Payers and quality reviewers may expect the chart to reflect why a systemic or infectious rheumatologic evaluation was (or was not) pursued when bilateral retinal vasculitis is diagnosed, since bilateral disease more often reflects a systemic process than isolated unilateral vasculitis.
Tip
Confirm from the fluorescein angiography or fundus exam report that vasculitis — not simply nonspecific “vascular changes” — is the documented finding before assigning H35.06x rather than the broader H35.01x background vascular-change codes.
✅ Includes
- Retinal periphlebitis, both eyes.
- Retinal perivasculitis, both eyes.
- Bilateral inflammation of the retinal vasculature attributable to infectious disease, systemic lupus erythematosus, multiple sclerosis, Behçet syndrome, or chorioretinitis.
❌ Excludes
Excludes 1
No Excludes1 note is published specifically for H35.063; this code does not have any mutually exclusive code pairing at the current specificity level.
Danger
There is no common Excludes1 pitfall documented for this code, but coders should still avoid double-reporting a diabetic retinal disorder code (see Excludes2 below) alongside H35.063 for the same clinical finding, since diabetic vascular changes and idiopathic/systemic retinal vasculitis are coded through entirely separate code families.
Excludes 2
Diabetic retinal disorders (E11.311 and other codes in the E08.311x-E13.359x diabetic retinopathy ranges) — when retinal vascular inflammation is specifically attributable to diabetic retinopathy rather than an independent vasculitic process, the diabetic retinal disorder codes are used instead; however, both may be reported together if a patient has diabetic retinopathy and a separately documented, non-diabetic retinal vasculitis.
📋 Clinical Overview
Bilateral vs. Unilateral Retinal Vasculitis
Distinguishing bilateral from unilateral retinal vasculitis is the key clinical decision point driving code selection and often signals a different underlying etiology and workup pathway.
| Feature | H35.063 | Related H35.061 | Related H35.062 |
|---|---|---|---|
| Laterality | Both eyes affected simultaneously. | Right eye only. | Left eye only. |
| Systemic association likelihood | Higher likelihood of an underlying systemic inflammatory or infectious etiology given bilateral presentation. | May be idiopathic or localized, though systemic disease is still possible. | May be idiopathic or localized, though systemic disease is still possible. |
| Typical workup emphasis | Often prompts rheumatologic, infectious disease, and neurologic (e.g., multiple sclerosis) evaluation given bilateral involvement. | Workup may proceed similarly but with somewhat lower initial suspicion for systemic disease if truly isolated. | Same consideration as right-eye-only presentation. |
Important
A CDI query is warranted when documentation states “vasculitis” without specifying laterality, or when only “vascular changes” is documented without clarifying whether active inflammation (vasculitis) versus non-inflammatory vascular change is present, since these map to entirely different fifth-character categories.
Manifestations & Symptom Burden
- Blurred or decreased vision, which may be sudden or gradually progressive.
- Floaters, reflecting associated vitritis or vitreous hemorrhage in more severe cases.
- Perivascular sheathing and vessel wall staining/leakage on fluorescein angiography.
- Retinal hemorrhages and, in advanced cases, retinal ischemia or neovascularization.
- Cystoid macular edema, when inflammation involves the macular vasculature.
Tip
💰 HCC Risk Adjustment
| Model | HCC Category | RAF Weight | Notes |
|---|---|---|---|
| CMS-HCC V28 (PY2026) | N/A — not currently a payment HCC | N/A | Retinal vasculitis is not among the 115 current CMS-HCC V28 payment categories — flag to verify against current CMS-HCC V28 model software rather than relying solely on this note. |
ICD-10 CM H35.063 does not independently generate risk-adjustment value under CMS-HCC V28. When bilateral retinal vasculitis is a manifestation of an HCC-eligible systemic condition — for example, systemic lupus erythematosus or a vasculitic syndrome captured elsewhere in the record — that underlying diagnosis should be identified, documented per MEAT criteria, and coded separately, since it (not H35.063) is what carries RAF weight.
🏥 MS-DRG Assignment
| DRG | Title | CC/MCC Tier |
|---|---|---|
| 124 | Other Disorders of the Eye | With MCC or Thrombolytic Agent |
| 125 | Other Disorders of the Eye | Without MCC |
When reported as principal diagnosis for an inpatient stay, H35.063 groups to MDC 02 Other Disorders of the Eye; unlike many other DRG families, this pairing has only two tiers, so DRG assignment depends specifically on the presence or absence of a documented major complication/comorbidity (MCC) rather than a graded CC level, making thorough secondary-diagnosis capture of any systemic disease or treatment complication essential to accurate DRG weighting — flag exact DRG relative weights for direct verification against the current IPPS Final Rule. NCD/LCD note: No National Coverage Determination specific to retinal vasculitis or H35.063 was identified.¹ However, several active Local Coverage Determinations for ophthalmic (fluorescein) angiography explicitly list H35.061-H35.063 as covered diagnosis codes supporting medical necessity for CPT 92235 fluorescein angiography, since angiographic confirmation of vasculitic leakage and nonperfusion is considered medically necessary for diagnosis and treatment planning.² Verify your specific MAC’s LCD (e.g., the ophthalmic angiography LCD applicable to your jurisdiction) for exact frequency limitations and documentation requirements before billing.
🔗 Related ICD-10-CM Codes
Same Condition — Laterality Variants
- H35.061 — Retinal vasculitis, right eye
- H35.062 — Retinal vasculitis, left eye
- H35.069 — Retinal vasculitis, unspecified eye
Adjacent Retinal Vascular/Inflammatory Codes
- H35.013 — Changes in retinal vascular appearance, bilateral
- H35.053 — Retinal neovascularization, unspecified, bilateral
- H35.073 — Retinal telangiectasis, bilateral
- H30.93 — Unspecified chorioretinal inflammation, bilateral
- H44.13 — Sympathetic uveitis, bilateral
🛠️ Commonly Associated CPT Codes
- 92235 — Fluorescein angiography with interpretation and report, unilateral or bilateral; the primary diagnostic study used to confirm vasculitic leakage, staining, and nonperfusion.
- 92250 — Fundus photography with interpretation and report; commonly performed alongside angiography to document baseline retinal findings.
- 92134 — Scanning computerized ophthalmic diagnostic imaging, posterior segment, retina; used to assess and monitor associated cystoid macular edema.
- 67028 — Intravitreal injection of a pharmacologic agent; reported when an intravitreal corticosteroid or other anti-inflammatory agent is administered to treat active vasculitis.
- 92014 — Ophthalmological services, established patient, comprehensive; used for the comprehensive eye exam supporting ongoing management.
- 92083 — Visual field examination, extended; used when visual field loss is being assessed as a complication of vasculitis-related ischemia.
🏷️ Modifier Reference
| Modifier | Name | When to Apply |
|---|---|---|
| -50 | Bilateral | Apply to a unilateral-by-definition CPT code (e.g., 67028 intravitreal injection) when the same procedure is performed on both eyes at the same encounter, consistent with H35.063’s bilateral diagnosis. |
| -25 | Significant E/M | Apply when a significant, separately identifiable evaluation and management service is performed on the same day as a diagnostic or therapeutic eye procedure. |
| -59 | Distinct Service | Apply when a diagnostic test (e.g., fluorescein angiography) and a separate therapeutic procedure are performed on the same date and require distinct payability. |
| -76 | Repeat Procedure, Same Physician | Apply when a repeat fluorescein angiography or imaging study is performed by the same physician on a later date to monitor treatment response. |
NCCI Bundling Considerations
Fluorescein angiography (92235) and fundus photography (92250) are commonly performed together for retinal vasculitis workup but may be subject to NCCI edits depending on payer policy; verify current NCCI Procedure-to-Procedure edits before billing both on the same date, and append modifier -59 only when both are clearly medically necessary and separately documented.
🔬 ICD-10-PCS Crosswalk
ICD-10 CM H35.063 is a diagnosis code and does not itself convert to a procedure code; the following PCS codes represent inpatient procedures that may be performed in the workup or treatment of bilateral retinal vasculitis.
8E0932Z— Other Procedures, Eye, Percutaneous Approach, Diagnostic Imaging — flag to verify exact body-part character against your encoder for retina-specific structures.3E0CX2Z— Introduction of anti-inflammatory substance into eye, external approach; applies when a corticosteroid is administered directly into the eye during an inpatient stay.08333ZZ— Inspection, right eye, percutaneous approach; may apply if direct intraocular inspection/vitrectomy access is performed for diagnostic purposes.08343ZZ— Inspection, left eye, percutaneous approach; the left-sided counterpart when bilateral inspection is performed. Confirm exact body-part and approach characters against your facility’s encoder, since ICD-10-PCS ophthalmic structures require chart-level verification of the specific technique performed.
💊 Coding Scenarios and Examples
Example 1
Clinical Scenario:
A 34-year-old male with known Behçet syndrome presents with bilateral blurred vision and floaters. Dilated fundus exam and fluorescein angiography confirm bilateral perivascular sheathing, vessel staining, and leakage consistent with active retinal vasculitis in both eyes.
| Field | Code | Rationale |
|---|---|---|
| CPT | 92235 | Fluorescein angiography confirms the bilateral vasculitic findings supporting the diagnosis. |
| PDx | H35.063 | Retinal vasculitis, bilateral, is the confirmed ophthalmic diagnosis. |
Tip
Sequence the underlying Behçet syndrome diagnosis code as an additional diagnosis if actively managed during this encounter, since it establishes the systemic etiology driving the ocular findings. CDI note: document laterality and angiographic findings explicitly to support the bilateral, inflammatory (rather than non-inflammatory vascular) code selection.
Example 2
Clinical Scenario:
A 45-year-old female with bilateral retinal vasculitis and associated cystoid macular edema in both eyes undergoes bilateral intravitreal corticosteroid injections during the same encounter to control active inflammation.
| Field | Code | Rationale |
|---|---|---|
| CPT | 67028--50 | Modifier -50 reflects that the intravitreal injection was performed bilaterally, consistent with the bilateral disease process. |
| CPT 2 | 92134 | OCT imaging documents and quantifies the associated cystoid macular edema. |
| PDx | H35.063 | Retinal vasculitis, bilateral, remains the primary ophthalmic diagnosis driving treatment. |
Tip
Confirm payer-specific billing conventions for bilateral intravitreal injections, since some payers require two line items with -RT/-LT rather than a single line with modifier -50. CDI note: document the macular edema as a distinct finding secondary to the vasculitis to support medical necessity for both the imaging and injection codes.
Example 3
Clinical Scenario:
A 52-year-old male returns for a follow-up fluorescein angiography one month after initiating systemic immunosuppressive therapy for previously diagnosed bilateral retinal vasculitis, to assess treatment response.
| Field | Code | Rationale |
|---|---|---|
| CPT | 92235--76 | Modifier -76 identifies this as a repeat angiography by the same physician performed to monitor treatment response. |
| PDx | H35.063 | The condition being monitored remains bilateral retinal vasculitis. |
Tip
If angiography demonstrates full resolution of active vasculitis, subsequent encounters should reflect the updated clinical status rather than continuing to report active disease indefinitely. CDI note: document whether inflammation has resolved, improved, or persisted, since this directly affects whether H35.063 remains the accurate active diagnosis at future encounters.
⚠️ Coding Pitfalls and Tips
- Pitfall 1: Defaulting to the non-inflammatory background vascular-change code H35.013 when the angiography report specifically documents active vasculitis (perivascular sheathing, staining, leakage); Tips: Read the full angiography interpretation rather than a generic referral diagnosis, since the presence of active inflammation determines whether H35.06x versus H35.01x is correct.
- Pitfall 2: Reporting a unilateral code (H35.061 or H35.062) when both eyes are actually affected, or vice versa; Tips: Confirm laterality directly from the dilated exam and angiography findings for each eye rather than assuming symmetry.
- Pitfall 3: Failing to also code the underlying systemic disease (e.g., Behçet syndrome, systemic lupus erythematosus) when documented, since H35.063 alone does not capture the systemic etiology; Tips: Review the full assessment for any named systemic condition and code it as an additional diagnosis when clinically supported.
- Pitfall 4: Assuming H35.063 carries HCC risk-adjustment value under CMS-HCC V28, leading to missed opportunities to instead capture the true HCC-relevant systemic condition; Tips: Review the chart for an HCC-eligible underlying etiology and code it separately with full MEAT documentation.
- Pitfall 5: Reporting a diabetic retinal disorder code alongside H35.063 for the same finding when the vasculitis is actually diabetes-related rather than an independent process; Tips: Clarify with the provider whether the vascular inflammation is attributable to diabetic retinopathy (use the appropriate E08-E13 diabetic code instead) or represents a separate, non-diabetic vasculitic process.
- Pitfall 6: Continuing to report H35.063 as an active diagnosis at follow-up encounters after documentation shows the vasculitis has fully resolved; Tips: Confirm current disease-activity language at each encounter and update the diagnosis accordingly, since active and resolved inflammatory states should not be coded identically.
📚 Sources
1. Centers for Medicare & Medicaid Services. *Medicare Coverage Database (MCD) — NCD/LCD Search.* CMS.gov; 2026. https://www.cms.gov/medicare-coverage-database 2. CGS Administrators. *Local Coverage Determination: Ophthalmic Angiography (Fluorescein and Indocyanine Green) (L34175).* CMS Medicare Coverage Database; 2026. 3. Centers for Medicare and Medicaid Services and the National Center for Health Statistics. *ICD-10-CM 2026, Code H35.063.* NCHS; 2026. https://www.icd10data.com/ICD10CM/Codes/H00-H59/H30-H36/H35-/H35.063 4. AAPC. *ICD-10-CM H35.0 and H35.06 — Excludes1/Excludes2 Notes.* Codify by AAPC; 2026. https://www.aapc.com/codes/icd-10-codes/H35.06 5. Centers for Medicare & Medicaid Services. *ICD-10-CM/PCS MS-DRG Definitions Manual, MDC 02.* CMS.gov; 2026.Sources listed above correspond to superscript citations throughout this note. Verify all Medicare payment figures against your current CMS PFS Lookup tool and applicable MAC LCD prior to claim submission. Please use the latest AAPC/AHIMA Coding Books to verify each code within this note.