ICD-9-CM diagnosis code (retired)
099.56 — Other venereal diseases due to chlamydia trachomatis, peritoneum
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 099.56
099.56 is an ICD-9-CM diagnosis code for other venereal diseases due to chlamydia trachomatis, peritoneum. 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, A56.8 (Sexually transmitted chlamydial infection of other sites). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- A56.8Sexually transmitted chlamydial infection of other sitesapproximate
Common questions about 099.56
What is the ICD-10 code for ICD-9 099.56?
- The GEMs map 099.56 to ICD-10-CM A56.8.
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.