ICD-10-CM 2027
ICD-10 code for iris adhesions
From the official ICD-10-CM alphabetic index entry “Adhesions, adhesive (postinfective) › iris”. Page updated September 29, 2026.
About coding iris adhesions
The ICD-10-CM code for iris adhesions is H21.50 (Unspecified adhesions of iris). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H21.50.
Within H21.5, choose H21.50 (Unspecified adhesions of iris) only when documentation doesn't support a more specific option: anterior synechiae (iris) (H21.51), goniosynechiae (H21.52), Iridodialysis (H21.53), posterior synechiae (iris) (H21.54), recession of chamber angle (H21.55) and pupillary abnormalities (H21.56).
To report this condition, pick the subcode that matches the documentation: H21.501 (right eye), H21.502 (left eye), H21.503 (bilateral) and H21.509 (and ciliary body, unspecified eye).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific iris adhesions codes (official index)
Common questions about iris adhesions ICD-10 codes
What is the ICD-10 code for iris adhesions?
- H21.50 — Unspecified adhesions of iris (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H21.51, H21.52, H21.54, T85.898.
What is the ICD-10 code for anterior iris adhesions?
- H21.51 — Anterior synechiae (iris) (header code; choose a more specific subcode).
What is the ICD-10 code for goniosynechiae iris adhesions?
- H21.52 — Goniosynechiae (header code; choose a more specific subcode).
What is the ICD-10 code for posterior iris adhesions?
- H21.54 — Posterior synechiae (iris) (header code; choose a more specific subcode).
Is H21.50 billable?
- No. H21.50 is a header code. Report one of its more specific subcodes instead.