ICD-9-CM diagnosis code (retired)
377.34 — Toxic optic neuropathy
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 377.34
377.34 is an ICD-9-CM diagnosis code for toxic optic neuropathy. 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, H46.3 (Toxic optic neuropathy). The match is exact.
ICD-10-CM equivalents
- H46.3Toxic optic neuropathyexact match
Common questions about 377.34
What is the ICD-10 code for ICD-9 377.34?
- The GEMs map 377.34 to ICD-10-CM H46.3.
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.