ICD-9-CM diagnosis code (retired)
364.77 — Recession of chamber angle of eye
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 364.77
364.77 is an ICD-9-CM diagnosis code for recession of chamber angle of eye. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, H21.559 (Recession of chamber angle, unspecified eye). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- H21.559Recession of chamber angle, unspecified eyeapproximate
Common questions about 364.77
What is the ICD-10 code for ICD-9 364.77?
- The GEMs map 364.77 to ICD-10-CM H21.559.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.