ICD-10 Code H35.81 – Retinal edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.81 – Retinal edema
What it is
Retinal edema means swelling within the retina, the light-sensitive layer at the back of the eye. It is a diagnosis code used when documentation identifies retinal swelling, not just general eye inflammation.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include blurred or distorted vision and retinal thickening on eye examination or imaging. The record may also note macular involvement or associated retinal disease.
When to use this code
Use H35.81 when the provider specifically documents retinal edema or retinal swelling. It is appropriate when the condition is the reason for evaluation, follow-up, or ophthalmology assessment. Code the documented cause separately when supported, such as a retinal disorder or diabetic eye disease.
Do not use for
Do not use this code for nonspecific eye redness, conjunctival swelling, or edema limited to the eyelid. If the chart only says “macular edema,” check documentation and code the more specific documented condition.
Coding tip
Look for the exact anatomic site in the note; retinal edema is not the same as general ocular edema.