ICD-10 Code H21.22 – Degeneration of ciliary body (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.22 – Degeneration of ciliary body
What it is
This code identifies degenerative changes affecting the ciliary body, the eye structure that helps produce aqueous humor and support focusing. Use it when documentation specifically names degeneration of the ciliary body.
Clinical signs
Clinical features vary; refer to documentation. Findings may include structural abnormality of the ciliary body noted on eye examination or imaging, with associated anterior segment changes if described by the clinician.
When to use this code
Use H21.22 when the provider documents degeneration of the ciliary body as the confirmed diagnosis or a relevant finding. You may also use it when the record clearly links the condition to the ciliary body rather than to another ocular structure.
Do not infer this code from vague terms such as “eye degeneration” or “anterior segment disorder.” Check documentation for the exact anatomy and diagnosis wording before assigning the code.
Do not use for
Do not use this code for unrelated iris, lens, or retinal degeneration. If the record does not specifically identify ciliary body degeneration, check documentation and code the documented condition instead.
Coding tip
Code only when the ciliary body is explicitly named; anatomy matters here.