ICD-10 Code H21.229 – Degeneration of ciliary body, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.229 – Degeneration of ciliary body, unspecified eye
What it is
This code identifies degeneration affecting the ciliary body, the part of the eye that helps produce aqueous humor and support focusing. Use it when the record documents ciliary body degeneration but does not specify laterality.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an abnormal ciliary body appearance on eye examination or imaging, with associated ocular changes noted by the ophthalmologist.
When to use this code
Use H21.229 when the provider documents degeneration of the ciliary body and does not identify the right or left eye. It is also appropriate when the note clearly states unspecified eye or when laterality cannot be confirmed from the record.
Code only the documented condition, not the suspected cause or unrelated anterior segment findings. If the chart mentions another ciliary body disorder instead of degeneration, check documentation before assigning this code.
Do not use for
Do not use this code for ciliary body disease with a documented right or left eye, or for other anterior segment disorders. Check documentation if the note describes inflammation, tumor, or trauma rather than degeneration.
Coding tip
Always verify laterality in the ophthalmology note; if it is absent, H21.229 is the correct unspecified-eye choice.