ICD-10 Code H35.423 – Microcystoid degeneration of retina, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.423 – Microcystoid degeneration of retina, bilateral
What it is
H35.423 identifies microcystoid degeneration affecting both retinas. It describes a bilateral degenerative retinal change, not a separate infectious or traumatic eye disease.
Clinical signs
Findings may include retinal degeneration noted on ophthalmic examination, sometimes with visual disturbance or incidental discovery. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents microcystoid degeneration of the retina in both eyes. It fits ophthalmology notes, retinal exam findings, or problem lists that clearly specify bilateral involvement. If the record only says retinal degeneration without laterality, check documentation.
Do not use for
Do not use H35.423 for unilateral microcystoid degeneration or for nonspecific retinal degeneration without bilateral documentation. Do not assign it when the diagnosis is uncertain or not stated clearly.
Coding tip
Confirm both the condition and laterality in the assessment, since the code is specific to bilateral disease.