ICD-9-CM diagnosis code (retired)
646.91 — Unspecified complication of pregnancy, delivered, with or without mention of antepartum condition
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 646.91
646.91 is an ICD-9-CM diagnosis code for unspecified complication of pregnancy, delivered, with or without mention of antepartum condition. 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, O99.89 (Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- O99.89Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumapproximate
Common questions about 646.91
What is the ICD-10 code for ICD-9 646.91?
- The GEMs map 646.91 to ICD-10-CM O99.89.
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.