ICD-9-CM diagnosis code (retired)
646.90 — Unspecified complication of pregnancy, unspecified as to episode of care or not applicable
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 646.90
646.90 is an ICD-9-CM diagnosis code for unspecified complication of pregnancy, unspecified as to episode of care or not applicable. 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, O26.90 (Pregnancy related conditions, unspecified, unspecified trimester). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- O26.90Pregnancy related conditions, unspecified, unspecified trimesterapproximate
Common questions about 646.90
What is the ICD-10 code for ICD-9 646.90?
- The GEMs map 646.90 to ICD-10-CM O26.90.
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.