ICD-9-CM diagnosis code (retired)
256.4 — Polycystic ovaries
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 256.4
256.4 is an ICD-9-CM diagnosis code for polycystic ovaries. 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, E28.2 (Polycystic ovarian syndrome). The match is exact.
ICD-10-CM equivalents
- E28.2Polycystic ovarian syndromeexact match
Common questions about 256.4
What is the ICD-10 code for ICD-9 256.4?
- The GEMs map 256.4 to ICD-10-CM E28.2.
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.