ICD-9-CM diagnosis code (retired)
662.00 — Prolonged first stage of labor, 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 662.00
662.00 is an ICD-9-CM diagnosis code for prolonged first stage of labor, 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, O63.0 (Prolonged first stage (of labor)). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- O63.0Prolonged first stage (of labor)approximate
Common questions about 662.00
What is the ICD-10 code for ICD-9 662.00?
- The GEMs map 662.00 to ICD-10-CM O63.0.
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.