ICD-10 Code H21.219 – Degeneration of chamber angle, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.219 – Degeneration of chamber angle, unspecified eye
What it is
This code identifies degeneration of the eye’s chamber angle, the drainage area where aqueous fluid exits the anterior chamber. “Unspecified eye” means the record does not state right, left, or bilateral involvement.
Clinical signs
Clinical features vary; refer to documentation. Findings may include angle changes noted on gonioscopy or other eye examination, with no more specific laterality or cause recorded.
When to use this code
Use H21.219 when the provider documents degeneration of the chamber angle but does not specify which eye is affected. It also fits when the note confirms the diagnosis without naming a more specific disorder. If the chart later identifies laterality or another exact condition, code that instead.
Do not use for
Do not use this code for glaucoma, angle-closure disease, or other documented anterior chamber angle disorders unless degeneration is specifically stated. Check documentation if the record names a different eye condition.
Coding tip
Confirm laterality and the exact ocular diagnosis before assigning H21.219.