ICD-10 Code H35.429 – Microcystoid Degeneration of Retina, Unspecified Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.429 – Microcystoid degeneration of retina, unspecified eye
What it is
This code identifies microcystoid degeneration of the retina when the affected eye is not specified. It refers to degenerative retinal change described as small cyst-like spaces or a microcystic appearance.
Clinical signs
Clinical features vary; refer to documentation. Findings may include retinal degeneration noted on eye examination or imaging, with a microcystoid pattern described by the clinician.
When to use this code
Use H35.429 when the provider documents microcystoid degeneration of the retina and does not identify the right or left eye. It is appropriate for ophthalmology notes, consults, or problem lists that clearly name this diagnosis. Check documentation if the record only mentions nonspecific retinal changes.
Do not use for
Do not use this code when the provider specifies the right or left eye, because the unspecified-eye code would be incorrect. Do not assign it for other retinal degenerations or cystic retinal disorders unless microcystoid degeneration is explicitly documented.
Coding tip
If the eye laterality is missing, query the provider before coding to avoid using an unspecified code unnecessarily.