ICD-10 Code H35.09 – Other Intraretinal Microvascular Abnormalities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.09 – Other intraretinal microvascular abnormalities
What it is
This code identifies abnormal small blood vessels within the retina that do not fit a more specific retinal vascular diagnosis. Use it when documentation describes intraretinal microvascular changes without a clearer named condition.
Clinical signs
Findings may include visible retinal microvascular abnormalities on eye examination or imaging. Clinical features vary; refer to documentation and the ophthalmology report for the exact description.
When to use this code
Use H35.09 when the provider documents other intraretinal microvascular abnormalities and does not assign a more specific retinal disorder. It may apply when the chart notes microvascular changes, but the record does not support a different retinal vascular code. Check documentation for laterality and associated eye findings.
Do not use for
Do not use this code for diabetic retinopathy, retinal vein occlusion, or other clearly named retinal vascular diseases. If the documentation identifies a specific retinal condition, code that diagnosis instead.
Coding tip
Match the code to the exact wording in the eye note and avoid defaulting to H35.09 when a more specific retinal diagnosis is documented.