ICD-10 Code H21.2 – Degeneration of iris and ciliary body (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.2 – Degeneration of iris and ciliary body
What it is
This code identifies degenerative changes affecting the iris and ciliary body, the front parts of the eye that help control light entry and produce aqueous fluid. Use it when the record specifically documents degeneration rather than inflammation, injury, or tumor.
Clinical signs
Clinical features vary; refer to documentation. Findings may include visible structural change of the iris or ciliary body on exam, with associated abnormal pupil appearance or anterior segment abnormalities noted by the eye specialist.
When to use this code
Use H21.2 when the provider documents degeneration of the iris and/or ciliary body as the diagnosis. It fits ophthalmology notes describing degenerative anterior segment change without a more specific coded condition. If the note is vague, check documentation before assigning the code.
Do not use for
Do not use this code for iritis, trauma, congenital anomalies, or neoplasms of the iris or ciliary body. If the record names a different disorder or only says “abnormality,” check documentation.
Coding tip
Code only when the provider clearly documents degeneration of the iris or ciliary body, and capture the more specific diagnosis if one is stated.