ICD-9-CM diagnosis code (retired)
091.81 — Acute syphilitic meningitis (secondary)
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 091.81
091.81 is an ICD-9-CM diagnosis code for acute syphilitic meningitis (secondary). 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, A51.41 (Secondary syphilitic meningitis). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- A51.41Secondary syphilitic meningitisapproximate
Common questions about 091.81
What is the ICD-10 code for ICD-9 091.81?
- The GEMs map 091.81 to ICD-10-CM A51.41.
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.