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ICD-10-CM 2027

ICD-10 code for chamber angle eye recession

H21.55

Recession of chamber angle

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Recession, receding › chamber angle (eye)”. Page updated September 29, 2026.

About coding chamber angle eye recession

The ICD-10-CM code for chamber angle eye recession is H21.55 (Recession of chamber angle).

Within H21.5 (other and unspecified adhesions and disruptions of iris and ciliary body), H21.55 is specifically for recession of chamber angle. Related codes cover unspecified adhesions of iris (H21.50), anterior synechiae (iris) (H21.51), goniosynechiae (H21.52), Iridodialysis (H21.53), posterior synechiae (iris) (H21.54) and pupillary abnormalities (H21.56).

To report this condition, pick the subcode that matches the documentation: H21.551 (right eye), H21.552 (left eye), H21.553 (bilateral) and H21.559 (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.

Common questions about chamber angle eye recession ICD-10 codes

What is the ICD-10 code for chamber angle eye recession?

H21.55 — Recession of chamber angle (a header code; report a more specific subcode).

Is H21.55 billable?

No. H21.55 is a header code. Report one of its more specific subcodes instead.