H35.052

🧬 ICD-10 CM H35.052 - Retinal Neovascularization, Unspecified, Left Eye

📋 Code Identity

Field	Detail
ICD-10-CM Code	H35.052
Full Descriptor	Retinal Neovascularization, Unspecified, Left Eye
Abbreviation	Retinal NV / NVE - Left Eye
Code Type	ICD-10-CM Diagnosis (Billable)
Effective Date	FY 2026 (October 1, 2025 - September 30, 2026)
Chapter	7 - Diseases of the Eye and Adnexa (H00-H59)
Block	H30-H36 - Disorders of Choroid and Retina
Parent Category	H35 - Other Retinal Disorders
Subcategory	H35.0 - Background Retinopathy and Retinal Vascular Changes
Sub-Subcategory	H35.05 - Retinal Neovascularization, Unspecified
Laterality	6th character = 2 (Left Eye)
Billable?	✅ Yes — 6 characters, fully specified
”Code Also” Instruction	Code also any associated hypertension I10
Chronic Condition	Yes
CC/MCC Status	Non-CC / Non-MCC
CMS FA Coverage	✅ Listed in CMS Ophthalmic Angiography LCD Group 1 covered diagnoses
CMS Posterior Segment OCT Coverage	✅ Listed in CMS Posterior Segment Imaging LCD

⚠️ Laterality Reminder: ICD-10-CM H35.052 is left eye only. Use H35.051 for the right eye, H35.053 for bilateral involvement, and H35.059 for unspecified eye. Always assign the most specific laterality supported by the documentation. The word “unspecified” in the code descriptor refers to the etiology of the neovascularization — not the laterality, which is clearly left eye.

🔴 WHEN NOT TO USE THIS CODE: If the patient has any documented diabetes mellitus and retinal neovascularization is present in the left eye, do not use H35.052. Use the appropriate proliferative diabetic retinopathy code from the E08-E13 family (e.g., E11.3522 for Type 2 DM with proliferative DR with traction retinal detachment involving the macula, left eye — or the appropriate severity level). Diabetic NV always belongs in the E-code family, not H35.05x.

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🔬 Clinical Description

Retinal neovascularization (NV) of the left eye is the pathological growth of new, structurally immature blood vessels within or on the surface of the left retina, driven by chronic retinal ischemia and upregulation of VEGF-A and angiopoietin-2 (Ang-2) in the hypoxic retinal microenvironment. These vessels are fenestrated (lacking tight junctions), have absent or minimal pericyte coverage, and are highly prone to leakage, hemorrhage, fibrosis, and tractional forces on the underlying retina. Without treatment, retinal NV in the left eye carries a significant risk of vitreous hemorrhage (VH), tractional retinal detachment (TRD), neovascular glaucoma (NVG), and permanent central vision loss.

The H35.05x family captures non-diabetic retinal neovascularization specifically. This is a left-eye mirror of H35.051, with all clinical principles, pathophysiology, and treatment paradigms being identical — differentiated only by laterality.

Pathophysiology Summary

The pathogenesis follows the same final common pathway as the right eye counterpart:

1. Retinal ischemia — Capillary or arterial occlusion, venous occlusion, sickle vaso-occlusion, radiation damage, or chronic hypoperfusion creates zones of non-perfused retina (NPR) in the left eye.
2. VEGF-A upregulation — Hypoxic retinal neurons and Müller cells dramatically increase VEGF-A secretion, driving angiogenic signaling.
3. Endothelial proliferation and sprouting — VEGF binds VEGFR-2 on capillary endothelium → cell migration, proliferation, and tube formation at the ischemic margin.
4. Neovascularization subtypes:
   • NVE (Neovascularization Elsewhere) — Peripheral/mid-peripheral NV on the retinal surface; grows along posterior hyaloid face
   • NVD (Neovascularization of the Disc) — On or within 1 disc diameter of the left optic nerve head; highest hemorrhage risk
   • NVI / NVA — Iris / angle NV from severe ischemia; code separately with anterior segment codes
5. Fibrotic progression — NV fronds undergo fibrovascular transformation → fibrovascular proliferative membranes → traction → TRD

Non-Diabetic Causes — Left Eye Context

Etiology	Mechanism	Additional Codes to Consider
Branch Retinal Vein Occlusion (BRVO), Left Eye	Venous stasis → ischemia → VEGF ↑	H34.8321 or H34.8322 + H35.052
Central Retinal Vein Occlusion (CRVO), Left Eye	Pan-venous stasis → ischemia → NVD/NVI	H34.8120 + H35.052
Branch Retinal Artery Occlusion (BRAO), Left Eye	Arterial ischemia → inner retinal NV	H34.232 + H35.052
Sickle Cell Retinopathy (PSR), Left Eye	Peripheral vaso-occlusion → sea-fan NVE	D57.1 + H35.052
Radiation Retinopathy, Left Eye	Radiation endothelial injury → NPR → NV	H59.312 + H35.052
Ocular Ischemic Syndrome (OIS), Left Eye	Left carotid stenosis → hypoperfusion	I65.22 + H35.052
Coats Disease, Left Eye	Retinal telangiectasia → exudation and ischemia	H35.022 + H35.052 when NV develops
Hypertensive Retinopathy, Left Eye	Severe ischemic HTN retinopathy → NV	H35.032 + I10 + H35.052
Idiopathic / Other	No systemic etiology identified	H35.052 alone + I10 if HTN present

Imaging Correlates — Left Eye

Modality	Active/Acute NV Findings	Post-Treatment / Chronic
Fundus Photography	Red/pink NV fronds on retinal surface or left disc; fibrovascular membranes	Regressed NV post-PRP; pale fibrotic scar; laser burn scars
Fluorescein Angiography (FA)	Early hyperfluorescence of NV; profuse late leakage; NPR zone hypofluorescence	Reduced NV leakage; staining of laser scars; residual NPR
OCT Posterior Segment	NV membrane on retinal surface; posterior hyaloid traction; epiretinal fibrosis	Inner retinal atrophy in ischemic zone; resolved NV membrane
OCTA	Flow signal in NV fronds; capillary plexus dropout in NPR zone	Reduced/absent NV flow post-treatment; ghost vessel remnants
Wide-Field FA / Optos	Essential for peripheral NV (PSCR, BRVO periphery, OIS)	Post-PRP peripheral burn mapping; NV regression confirmation

🎯 Laterality-Specific Anatomy Reminder: The left eye has its own distinct arterial supply (left ophthalmic artery from the left internal carotid), venous drainage, and retinal anatomy. Ocular ischemic syndrome in the left eye is driven by left carotid artery disease I65.22 — not right carotid. This matters for systemic workup documentation and the associated codes you select.

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🌳 Code Tree

H35 - Other Retinal Disorders
│
├── H35.0 - Background Retinopathy and Retinal Vascular Changes
│   │
│   ├── H35.00 - Unspecified background retinopathy (billable)
│   │
│   ├── H35.01 - Changes in Retinal Vascular Appearance
│   │   ├── H35.011 - Right eye
│   │   ├── H35.012 - Left eye
│   │   ├── H35.013 - Bilateral
│   │   └── H35.019 - Unspecified eye
│   │
│   ├── H35.02 - Exudative Retinopathy (Coats Disease)
│   │   ├── H35.021 - Right eye
│   │   ├── H35.022 - Left eye
│   │   ├── H35.023 - Bilateral
│   │   └── H35.029 - Unspecified eye
│   │
│   ├── H35.03 - Hypertensive Retinopathy
│   │   ├── H35.031 - Right eye
│   │   ├── H35.032 - Left eye
│   │   ├── H35.033 - Bilateral
│   │   └── H35.039 - Unspecified eye
│   │
│   ├── H35.04 - Retinal Microaneurysms, Unspecified
│   │   ├── H35.041 - Right eye
│   │   ├── H35.042 - Left eye
│   │   ├── H35.043 - Bilateral
│   │   └── H35.049 - Unspecified eye
│   │
│   ├── H35.05 - Retinal Neovascularization, Unspecified
│   │   ├── H35.051 - Right eye
│   │   ├── H35.052 - Left eye  ◀ THIS CODE
│   │   ├── H35.053 - Bilateral
│   │   └── H35.059 - Unspecified eye
│   │
│   ├── H35.06 - Retinal Vasculitis
│   │   ├── H35.061 - Right eye
│   │   ├── H35.062 - Left eye
│   │   ├── H35.063 - Bilateral
│   │   └── H35.069 - Unspecified eye
│   │
│   ├── H35.07 - Retinal Telangiectasis
│   │   ├── H35.071 - Right eye
│   │   ├── H35.072 - Left eye
│   │   ├── H35.073 - Bilateral
│   │   └── H35.079 - Unspecified eye
│   │
│   └── H35.09 - Other Intraretinal Microvascular Abnormalities
│       *(IRMA, retinal varices, other NOS microvascular changes)*
│
├── H35.2 - Other Non-Diabetic Proliferative Retinopathy
│   ├── H35.20 - Unspecified eye (billable)
│   ├── H35.21 - Right eye
│   ├── H35.22 - Left eye  ← Upgrade to this when NV progresses to
│   └── H35.23 - Bilateral    full fibrovascular proliferative membranes
│
├── H35.3 - Degeneration of Macula and Posterior Pole
│   ├── H35.31x - Nonexudative AMD (Dry AMD)
│   └── H35.32x - Exudative AMD (Wet AMD/CNV)
│
├── H35.6 - Retinal Hemorrhage
│   ├── H35.61 - Right eye
│   ├── H35.62 - Left eye
│   └── H35.63 - Bilateral
│
└── H35.7 - Separation of Retinal Layers (Retinal Detachment family)

🔍 H35.052 vs. H35.22 — Critical Progression Distinction:

• H35.052 — captures active retinal neovascularization (NV fronds, sea-fan, NVD/NVE) in the left eye, non-diabetic; the vessel growth itself is the primary pathological finding
• H35.22 — captures non-diabetic proliferative retinopathy in the left eye with fibrovascular proliferative membranes, significant traction, and structural retinal risk; more advanced stage
• When provider documents “retinal NV” → H35.052. When provider documents “proliferative retinopathy with fibrovascular membranes and traction” → H35.22. Query the provider when the extent of proliferative disease is ambiguous in the documentation.

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✅ Includes

H35.052 captures the following clinical presentations in the left eye:

• Retinal neovascularization (NV) of non-diabetic etiology, left eye — NVE or NVD arising from ischemic NPR in the left eye
• Sea-fan neovascularization, left eye — classic peripheral NVE of proliferative sickle cell retinopathy (PSCR)
• NV arising from left BRVO or CRVO — venous occlusion-related ischemic NV in the left eye
• Radiation retinopathy-induced NV, left eye — post-radiation microvascular ischemia driving vessel proliferation
• NV in left ocular ischemic syndrome — chronic left carotid hypoperfusion driving retinal ischemia and neovascularization
• Idiopathic retinal NV, left eye — no identifiable systemic etiology
• NV secondary to Coats disease, left eye — when ischemia from exudative retinopathy drives vessel proliferation
• Early fibrovascular activity at the NV frond margin prior to full fibrovascular membrane development

Code Also Instruction

📌 Mandatory: Code also any associated hypertension I10 per the H35.0 subcategory instructional note in the ICD-10-CM Tabular List. This is required when hypertension is documented — it is not optional.

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🚫 Excludes

Excludes 2 (These conditions can be coded together — they are not the same as H35.052)

Excluded Code Range	Description	Guidance
E08.311-E08.359	Diabetic retinal disorders - DM due to underlying condition	If DM is the etiology → use E08.35x for NV, NOT H35.052
E09.311-E09.359	Diabetic retinal disorders - Drug/chemical-induced DM	Use E09.35x for drug-induced DM with NV
E10.311-E10.359	Diabetic retinal disorders - Type 1 DM	Use E10.35x for Type 1 PDR with NV
E11.311-E11.359	Diabetic retinal disorders - Type 2 DM	Most critical: Use E11.35x for Type 2 PDR — never H35.052 for diabetic NV
E13.311-E13.359	Diabetic retinal disorders - Other specified DM	Use E13.35x for other DM types with NV

🔴 Diabetic Boundary Rule: Documented DM + left eye retinal NV = E11.352x (or E10.352x, etc.) — not H35.052. The H35.05x family is reserved exclusively for non-diabetic NV. When DM is documented in the chart, all retinal NV for that patient falls under the E-code proliferative diabetic retinopathy family.

💡 The Prediabetes Exception: A patient with R73.09 (prediabetes / impaired fasting glucose) who has retinal NV does not have a diabetes diagnosis. H35.052 is appropriate for these patients. If diabetes is later confirmed at a future encounter, the code family must be changed.

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🏥 HCC (Hierarchical Condition Category)

Field	Detail
HCC Mapped?	❌ No — H35.052 does not map to any CMS-HCC v28 category
RAF Score Contribution	None directly from this code
Risk Adjustment Relevance	Indirect — through associated systemic etiologies

💰 RAF Strategy — Capture the Etiology, Capture the Score:

Code	Description	HCC?	Notes
D57.1	Sickle-cell disease without crisis	✅ HCC 47	PSCR-related NV; significant RAF
D57.0	Sickle-cell anemia with crisis	✅ HCC 46	Active crisis context
I65.22	Occlusion/stenosis, left carotid artery	✅ HCC 108	Left OIS etiology; ipsilateral to left eye
I48.91	Unspecified atrial fibrillation	✅ HCC 96	If A-fib contributes to left RVO
I25.10	Atherosclerotic heart disease of native CA	✅ HCC 88	Systemic macrovascular disease
E11.9	Type 2 DM without complications	✅ HCC 19	If DM present → switch to E11.352x for the eye code
I10	Essential hypertension	❌ None	Mandatory code-also; no HCC weight
E78.5	Hyperlipidemia	❌ None	Vascular risk factor

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🏨 MS-DRG (Medicare Severity DRG)

Field	Detail
CC/MCC Status	⬜ Non-CC / Non-MCC
Primary MS-DRG (as PDx)	MS-DRG 124 - Other Disorders of the Eye with MCC
Primary MS-DRG (no CC/MCC)	MS-DRG 125 - Other Disorders of the Eye without MCC/CC
MDC	MDC 02 - Diseases and Disorders of the Eye
Inpatient Admission Likelihood	Low-Moderate — retinal NV is outpatient-managed; inpatient admission typically driven by complications (VH, TRD) rather than NV alone
CMS MS-DRG Version	v42 (FY2026)

🏥 Inpatient Profee Tip: H35.052 most commonly appears as a secondary diagnosis in the inpatient record. When left eye NV causes a vitreous hemorrhage (H43.12 — left eye) or tractional retinal detachment (H33.042 — left eye), those complications become the principal diagnosis driving admission and surgical MS-DRG assignment. H35.052 as the underlying etiology is coded as an additional secondary diagnosis for completeness and clinical accuracy.

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💊 Associated CPT Codes (Commonly Reported With H35.052)

wRVU values reflect 2025 CMS Medicare Physician Fee Schedule Final Rule.

CPT Code	Description	wRVU (Non-Fac)	wRVU (Facility)	Assistant Payable?	Relevance
92235	Fluorescein angiography with interpretation and report	0.92	0.92	No	Essential — confirms NV presence, leakage, NPR extent; CMS LCD-covered for H35.052
92134	OCT posterior segment with interpretation and report	0.00	0.00	No	Documents NV membrane structure, vitreoretinal traction, associated macular edema
92137	OCT with OCT angiography (OCTA) with interpretation (2025+)	0.79	0.79	No	Maps NV network flow; NPR delineation; cannot bill same day as 92134
92240	ICG angiography with interpretation and report	0.92	0.92	No	For choroidal or OIS evaluation; supplements FA
92242	Combined FA + ICG angiography	1.38	1.38	No	When dual angiography medically necessary
92250	Fundus photography with interpretation and report	0.00	0.00	No	Baseline NV documentation; disc/retinal frond location and extent
67228	Treatment of extensive/progressive retinopathy; PRP photocoagulation, 1+ sessions	3.09	3.09	No	Primary treatment — scatter PRP to NPR zone; highest wRVU non-surgical retina procedure
67227	Destruction of extensive retinopathy; cryotherapy, 1+ sessions	3.43	3.43	No	Peripheral cryotherapy when laser not feasible (e.g., VH obscuring view)
67210	Destruction of localized retinal lesion; photocoagulation	3.43	3.43	No	Focal laser to specific NV feeder vessel or focal lesion
67028	Intravitreal injection of a pharmacological agent	0.72	0.72	No	Anti-VEGF adjunct or alternative to PRP for NV regression
67108	Repair of retinal detachment; vitrectomy, any method	17.77	17.77	Yes	PPV for TRD or VH complicating NV in left eye
67113	Repair of complex retinal detachment with vitrectomy	26.82	26.82	Yes	Complex combined TRD/RRD repair
99215	E/M, established patient, high complexity	2.85	2.85	No	Active NV monitoring; complex multisystem management
99205	E/M, new patient, high complexity	3.50	3.50	No	New left eye NV diagnosis
99254	Inpatient consult, moderate-high complexity	5.30	5.30	No	Inpatient ophthalmology consult for NV complication

⚠️ Key Bundling and NCCI Rules

• 92137 (OCTA) cannot be billed same day as 92134 (OCT posterior segment) — NCCI edit; mutually exclusive same DOS
• 92137 can be billed same day as 92235, 92240, or 92242
• 67028 + drug HCPCS are always separate line items; never bundle drug cost into the injection procedure code
• Modifier -25 required when E/M + 67228 or 67028 on same date of service
• 67228 global period is 0 days for most payers — -25 (not -57) is the appropriate E/M modifier when E/M + PRP performed same day
• 67108 and 67113 are payable with assistant surgeon — document medical necessity for assistant; confirm payer policy

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🔧 Applicable Modifiers

Modifier	Description	Application with H35.052
-LT	Left side	Append to all CPT codes performed on the left eye
-RT	Right side	When fellow right eye also treated or imaged at the same encounter
-50	Bilateral procedure	Bilateral FA, OCT, or same-day bilateral PRP
-25	Significant, separately identifiable E/M same day as procedure	Required when E/M + 67228 or 67028 on same DOS; document E/M independently
-59	Distinct procedural service	When two procedures are genuinely distinct and separately documented
-26	Professional component	Physician interprets imaging performed technically at another site
-TC	Technical component	Facility technical billing only
-54	Surgical care only	Surgeon provides operative care; another provider manages pre/post-op
-55	Postoperative management only	Follow-up management by a different provider
-57	Decision for surgery	E/M on same day as a 90-day global surgery is the decision encounter
-GC	Resident service with supervision	Teaching institution; attending documents supervision
-GA	ABN on file	Medicare beneficiary ABN obtained for potentially non-covered service
-AS	Assistant at surgery, non-physician	PA/NP assisting at 67108/67113
-80	Assistant surgeon (physician)	Physician assistant at PPV
-JW	Drug amount discarded	Anti-VEGF vial waste documentation
-JZ	Zero waste — no drug discarded	Full vial used with no waste

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📝 Coding Examples

Example 1 — BRVO with Retinal NV, Left Eye; PRP Performed

A 71-year-old established male with a known branch retinal vein occlusion (BRVO) of the left eye superior temporal branch, treated 5 months ago with anti-VEGF for macular edema. Returns today. OCT shows resolved macular edema, left eye. Dilated exam: new retinal NVE noted along the superior temporal arcade peripherally, left eye — consistent with ischemia from prior BRVO. FA confirms NVE with leakage and a large zone of peripheral capillary non-perfusion, left eye. PRP laser is performed to the non-perfused zone during the same visit.

Diagnosis Codes:

• H35.052 - Retinal neovascularization, unspecified, left eye (NVE from BRVO ischemia)
• H34.8322 - Tributary retinal vein occlusion, left eye, stable (verify 7th character with documentation — “2” = stable/inactive or per grouper logic)
• I10 - Essential hypertension (mandatory code also)

CPT Codes:

• 99215 - -25 - E/M, established patient, high complexity
• 92235 - -LT - Fluorescein angiography, left eye
• 67228 - -LT - PRP laser photocoagulation, left eye

💡 Coding Note: H35.052 and the BRVO code can both be reported — the BRVO code captures the underlying venous occlusion and its stage; H35.052 specifically documents the neovascularization finding and directly supports medical necessity for 67228 PRP.

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Example 2 — Proliferative Sickle Cell Retinopathy, Left Eye, Anti-VEGF

A 41-year-old female with sickle cell disease (Hb SC) presents for retina monitoring. Peripheral fundus exam reveals new sea-fan neovascularization (NVE) in the superotemporal periphery of the left eye. Wide-field FA confirms NV with profuse leakage and peripheral NPR, left eye. OCT-A maps the sea-fan morphology. Intravitreal bevacizumab (off-label) is injected in the left eye; scatter photocoagulation to be added at next visit pending NV response.

Diagnosis Codes:

• H35.052 - Retinal neovascularization, unspecified, left eye (sea-fan NVE; PSCR)
• D57.1 - Sickle-cell disease without crisis (underlying systemic etiology; HCC 47)

CPT Codes:

• 99215 - -25 - E/M, established patient, high complexity
• 92235 - -LT - Wide-field FA, left eye
• 92137 - -LT - OCT with OCT angiography, left eye (cannot bill 92134 same day)
• 67028 - -LT - Intravitreal injection, left eye

HCPCS Drug Code:

• J9035 - Bevacizumab (Avastin), off-label for proliferative sickle cell retinopathy, left eye
• Modifier -JZ if no waste; -JW + documented waste if applicable
• Modifier -GA if ABN obtained for off-label Medicare coverage

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Example 3 — Ocular Ischemic Syndrome, Left Eye, New NV

A 74-year-old male with left carotid artery stenosis (80%, confirmed on Doppler) presents with decreased vision, left eye, over several months. Dilated exam reveals mid-peripheral retinal neovascularization and microaneurysms, left eye, with cotton-wool spots. FA confirms extensive capillary non-perfusion in the mid-periphery and early NVD at the left disc. Patient referred to vascular surgery. PRP planned for next visit.

Diagnosis Codes:

• H35.052 - Retinal neovascularization, unspecified, left eye
• H35.042 - Retinal microaneurysms, unspecified, left eye (separately documented finding)
• I65.22 - Occlusion and stenosis of left carotid artery (OIS etiology; HCC 108)
• I10 - Essential hypertension (mandatory code also)

CPT Codes:

• 99205 - -25 - E/M, new patient, high complexity
• 92235 - -LT - FA, left eye (confirms NPR and NV)
• 92134 - -50 - OCT posterior segment, bilateral (not billing OCTA today; standard OCT)
• 92250 - -50 - Fundus photography, bilateral baseline

💡 Left Carotid Note: I65.22 (occlusion/stenosis of the left carotid artery) is the correctly lateralized code for left OIS — not I65.21 (right carotid). This is a common laterality error in OIS cases. Always match the carotid code to the ipsilateral eye.

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Example 4 — New Patient, NVD Left Eye, Urgent PRP Same Visit

A 59-year-old female, new patient, referred urgently from optometry for new disc neovascularization, left eye. No documented diabetes. History: hypertension, hyperlipidemia, prior left CRVO 2 years ago (not followed). Dilated exam: prominent NVD visible on the left optic disc; no vitreous hemorrhage. FA confirms NVD with profuse leakage; extensive panretinal capillary non-perfusion. Urgent PRP performed at this visit.

Diagnosis Codes:

• H35.052 - Retinal neovascularization, unspecified, left eye (NVD)
• H34.8122 - Central retinal vein occlusion, left eye, stable (prior CRVO as underlying etiology)
• I10 - Essential hypertension
• E78.5 - Hyperlipidemia, unspecified

CPT Codes:

• 99205 - -25 - E/M, new patient, high complexity
• 92235 - -LT - FA, left eye
• 67228 - -LT - PRP, left eye

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Example 5 — Vitreous Hemorrhage Complication from NV, Left Eye, Inpatient PPV

A 66-year-old established male with known left eye retinal NV (BRAO-related, on watchful waiting) presents to the ED with sudden, complete vision loss, left eye. Dense vitreous hemorrhage confirmed on B-scan ultrasound. Admitted for urgent pars plana vitrectomy (PPV) with endolaser PRP, left eye.

Diagnosis Codes:

• H43.12 - Vitreous hemorrhage, left eye (principal — acute complication driving admission)
• H35.052 - Retinal neovascularization, unspecified, left eye (underlying NV cause)
• H34.232 - Retinal artery branch occlusion, left eye (root etiology — BRAO)
• I10 - Essential hypertension

CPT Codes (Profee):

• 67108 - -LT - PPV with endolaser PRP, left eye
• 99254 - -57 - Inpatient consult + decision for surgery

🏥 Inpatient Facility DRG Note: PDx H43.12 + surgical procedure 67108 → Surgical DRG under MDC 02. H35.052 and H34.232 are secondary diagnoses; neither is a CC, but both contribute to clinical accuracy and complexity documentation for the medical record.

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Example 6 — Bilateral NV, Different Etiologies Per Eye

An established patient has right eye NV from sickle cell disease and left eye NV from a prior CRVO. Each eye has a distinct etiology documented in the clinical record.

Diagnosis Codes:

• H35.051 - Retinal NV, unspecified, right eye (PSCR sea-fan)
• H35.052 - Retinal NV, unspecified, left eye (CRVO-related ischemic NV)
• D57.1 - Sickle-cell disease without crisis (for right eye NV etiology)
• H34.8122 - CRVO, left eye, stable (for left eye NV etiology)
• I10 - Essential hypertension (if documented)

💡 Mixed-Etiology Bilateral Coding: Do not use H35.053 (bilateral) here — the etiologies differ per eye and each warrants its own etiology code pairing. Using the bilateral code would collapse the documentation and lose the laterality-etiology specificity that supports medical necessity and proper risk stratification.

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🔗 Related Diagnoses to Consider Coding Together

Code	Description	Relationship to H35.052
I10	Essential hypertension	Mandatory code also
H35.051	Retinal NV, unspecified, right eye	When both eyes affected
H35.053	Retinal NV, unspecified, bilateral	Use instead when both eyes at same stage/etiology
H35.042	Retinal microaneurysms, unspecified, left eye	Often coexists with NV in ischemic retinopathy
H35.032	Hypertensive retinopathy, left eye	When broader HTN retinal changes accompany NV
H35.09	Other intraretinal microvascular abnormalities	IRMA — may precede or coexist with NV
H35.22	Non-diabetic proliferative retinopathy, left eye	Upgrade to this when NV matures to fibrovascular membranes
H34.8320	Tributary (branch) retinal vein occlusion, left eye, with macular edema	BRVO as NV etiology, left eye
H34.8322	Tributary retinal vein occlusion, left eye, stable	BRVO stable; NV as late complication
H34.8120	CRVO, left eye, with macular edema	CRVO as NV etiology, left eye
H34.232	Branch retinal artery occlusion, left eye	BRAO ischemia driving NV, left eye
H43.12	Vitreous hemorrhage, left eye	Complication of ruptured NV frond
H33.042	Traction retinal detachment, left eye	Advanced fibrovascular complication
H40.842	Neovascular secondary angle-closure glaucoma, left eye (FY2026)	Anterior NV from posterior NV progression
D57.1	Sickle-cell disease without crisis	PSCR-related NV; HCC 47
I65.22	Occlusion and stenosis of left carotid artery	OIS left eye etiology; HCC 108
E78.5	Hyperlipidemia, unspecified	Vascular risk factor
H59.312	Post-procedural complications, left eye (radiation retinopathy context)	Radiation-related NV

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⚖️ H35.052 vs. E11.35x — Decision Guide

Clinical Scenario	Correct Code	Do NOT Use
NV in patient without documented DM (BRVO, sickle cell, OIS, radiation, idiopathic)	H35.052 + etiology codes	E11.352x
NV in patient with Type 2 DM	E11.352x (proliferative DR, left eye)	H35.052
NV in patient with Type 1 DM	E10.352x (proliferative DR, left eye)	H35.052
NV in patient with prediabetes (R73.09) only	H35.052 (prediabetes ≠ DM)	E11.352x
NV bilateral in non-diabetic at same stage	H35.053	H35.052 alone
NV left eye only	H35.052	H35.059 (when left eye is documented)
NV left eye progressed to fibrovascular membranes	H35.22	H35.052 alone (upgrade the code)

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📌 ICD-9-CM Crosswalk

ICD-9-CM	Description
362.16	Retinal neovascularization NOS

📝 ICD-9-CM 362.16 had no laterality. ICD-10-CM added right/left/bilateral/unspecified granularity — essential for outcomes analytics, surgical planning documentation, and population health tracking of asymmetric retinal disease.

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🧑‍💻 Coder Pearls

1. “Unspecified” = etiology, NOT laterality. The left eye is perfectly specified. Never let the word “unspecified” in the descriptor cause you to question laterality coding.
2. No diabetes = H35.052. Any diabetes = E11.352x (or E10, E08, etc.). This boundary is absolute. Prediabetes is the only gray zone — and prediabetes is not DM.
3. I10 is mandatory when hypertension is documented. This applies to the entire H35.0 subcategory. It’s not optional coding guidance — it’s a Tabular “code also” instruction.
4. Match the carotid code laterality to the eye. Left eye OIS → I65.22 (left carotid). Right eye OIS → I65.21 (right carotid). This is a frequent laterality coding error.
5. 67228 PRP is the therapeutic backbone for retinal NV at 3.09 wRVU. FA (confirming NPR extent) is the medical necessity anchor for PRP claims. Both are CMS LCD-covered for H35.052.
6. OCTA 92137 revolutionizes NV monitoring but cannot be billed with 92134 same day. Choose one per DOS and document the clinical rationale clearly.
7. Sea-fan NV in sickle cell = D57.1 is your HCC. The NV code carries no RAF, but D57.1 carries HCC 47. Always code the sickle cell disease when documented.
8. VH (H43.12) sequences first when it’s the presenting problem. When left eye NV ruptures and causes vitreous hemorrhage, H43.12 is the principal diagnosis for the acute visit/admission. H35.052 is the secondary etiology.
9. H35.22 is the upgrade path. When NV matures into fibrovascular proliferative membranes with traction, update the diagnosis code to H35.22 (non-diabetic proliferative retinopathy, left eye). Query the provider when documentation suggests advanced fibrovascular disease.
10. New FY2026 code H40.842 (neovascular secondary angle-closure glaucoma, left eye) completes the anterior segment downstream cascade from posterior NV. When iris neovascularization progresses to angle closure, this is the code — and it matters for glaucoma subspecialty billing.

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Sources: ICD-10-CM FY2026 Tabular List, CMS.gov; AAPC Codify H35.051-H35.053 and H35.05 subcategory; FindACode H35.051; ECGWaves H35.051/H35.052 Code References; CMS Billing & Coding: Ophthalmic Angiography (FA/ICG) A56774 v22 — H35.051-H35.053 Group 1 Covered Diagnoses; CMS Billing & Coding: Panretinal Scatter Laser Photocoagulation A56550; CMS Billing & Coding: Posterior Segment Imaging A57071 v30; Retinal Physician - Coding Q&A: Laser Photocoagulation Focus, Mar 2017 (updated Oct 2023); Retinal Physician - New Treatments for Sickle Cell Disease, Oct 2025; PMC - Laser Therapy for Retinopathy in Sickle Cell Disease, Mar 2023; PMC - Observation of Retinal NV Using OCT Following PRP, Jun 2021; CMS Billing & Coding: Ranibizumab, Biosimilars, Aflibercept A52451; CMS ICD-10-CM/PCS MS-DRG v42 Definitions Manual; CMS 2025 Medicare Physician Fee Schedule Final Rule