ICD-10 Code H35.359 – Cystoid Macular Degeneration, Unspecified Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.359 – Cystoid macular degeneration, unspecified eye
What it is
This code identifies cystoid macular degeneration in an unspecified eye. It refers to cyst-like fluid changes in the macula, the central retina responsible for sharp vision.
Clinical signs
Patients may report blurred or distorted central vision, reduced reading vision, or a central scotoma. Clinical features vary; refer to documentation and ophthalmology findings.
When to use this code
Use H35.359 when the provider documents cystoid macular degeneration but does not specify right or left eye. It is appropriate for encounters focused on macular edema-type retinal changes when the diagnosis is recorded as an unspecified eye. Check documentation if laterality is available elsewhere in the record.
Do not use for
Do not use this code if the eye is documented as right or left, since a laterality-specific code is needed. Do not use it for other macular disorders or retinal edema without documented cystoid macular degeneration.
Coding tip
Confirm laterality in the ophthalmology note before choosing the unspecified-eye code.