ICD-9-CM diagnosis code (retired)
621.31 — Simple endometrial hyperplasia without atypia
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 621.31
621.31 is an ICD-9-CM diagnosis code for simple endometrial hyperplasia without atypia. 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, N85.01 (Benign endometrial hyperplasia). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- N85.01Benign endometrial hyperplasiaapproximate
Common questions about 621.31
What is the ICD-10 code for ICD-9 621.31?
- The GEMs map 621.31 to ICD-10-CM N85.01.
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.