ICD-10 Code H21.221 – Degeneration of ciliary body, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.221 – Degeneration of ciliary body, right eye
What it is
H21.221 identifies degenerative change involving the ciliary body in the right eye. Use it when documentation specifically states ciliary body degeneration on the right side.
Clinical signs
Clinical features vary; refer to documentation. Findings may be noted on ophthalmic examination or imaging, but the record should clearly identify degeneration of the right ciliary body.
When to use this code
Use this code when the ophthalmologist documents degeneration of the ciliary body in the right eye as the diagnosis. It may appear in problem lists, consult notes, or follow-up assessments for a chronic ocular finding.
If the note only describes a nonspecific ciliary body disorder or does not specify laterality, check documentation before coding. Code only when the right eye is explicitly identified.
Do not use for
Do not use H21.221 for left-eye or bilateral disease, or for unrelated anterior segment disorders. If the record says only “eye degeneration” or is unclear, check documentation.
Coding tip
Verify both the anatomic site and laterality in the ophthalmology note before assigning H21.221.