ICD-9-CM diagnosis code (retired)
370.23 — Filamentary keratitis
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 370.23
370.23 is an ICD-9-CM diagnosis code for Filamentary keratitis. 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, H16.129 (Filamentary keratitis, unspecified eye). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- H16.129Filamentary keratitis, unspecified eyeapproximate
Common questions about 370.23
What is the ICD-10 code for ICD-9 370.23?
- The GEMs map 370.23 to ICD-10-CM H16.129.
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.