ICD-10 Code H35.40 – Unspecified peripheral retinal degeneration (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.40 – Unspecified peripheral retinal degeneration
What it is
This code identifies peripheral retinal degeneration when the specific type is not documented. It refers to degenerative changes at the edge of the retina, without further detail.
Clinical signs
Clinical features vary; refer to documentation. Findings may include peripheral retinal thinning, pigmentary change, or lattice-like degeneration noted on eye examination.
When to use this code
Use H35.40 when the record states peripheral retinal degeneration but does not specify a subtype. It is appropriate when the ophthalmology note confirms degeneration in the retinal periphery and no more detailed diagnosis is available. Check documentation if laterality or a more specific retinal disorder is described.
Do not use for
Do not use this code when a more specific peripheral retinal degeneration is documented, such as lattice degeneration or another named subtype. Also avoid it if the finding is unrelated to retinal degeneration.
Coding tip
Query for the exact retinal subtype before assigning H35.40, because unspecified codes should be used only when the chart lacks further detail.