ICD-9-CM diagnosis code (retired)
643.00 — Mild hyperemesis gravidarum, 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 643.00
643.00 is an ICD-9-CM diagnosis code for mild hyperemesis gravidarum, 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, O21.0 (Mild hyperemesis gravidarum). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- O21.0Mild hyperemesis gravidarumapproximate
Common questions about 643.00
What is the ICD-10 code for ICD-9 643.00?
- The GEMs map 643.00 to ICD-10-CM O21.0.
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.