ICD-10 Code H35.459 – Secondary pigmentary degeneration, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H35.459 – Secondary pigmentary degeneration, unspecified eye
What it is
This code identifies pigmentary degeneration of the retina that is secondary to another cause, when the affected eye is not specified. Use it for documented retinal pigment changes that are not primary retinitis pigmentosa.
Clinical signs
Clinical features vary; refer to documentation. Findings may include retinal pigment clumping or mottling, visual field loss, and reduced night vision, depending on the underlying cause and eye involvement.
When to use this code
Use H35.459 when the record states secondary pigmentary degeneration and does not identify the right, left, or both eyes. It may apply when the clinician documents retinal pigmentary change due to another ocular or systemic condition, but laterality is missing. If the cause is specified, code the underlying condition as directed.
Do not use for
Do not use this code for primary pigmentary retinal dystrophy or retinitis pigmentosa. Do not assign it when the documentation clearly identifies a specific eye or a different retinal disorder.
Coding tip
Check the note for laterality and the underlying cause before choosing this unspecified-eye code.