ICD-9-CM diagnosis code (retired)
556.0 — Ulcerative (chronic) enterocolitis
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 556.0
556.0 is an ICD-9-CM diagnosis code for ulcerative (chronic) enterocolitis. 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, K51.80 (Other ulcerative colitis without complications). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- K51.80Other ulcerative colitis without complicationsapproximate
Common questions about 556.0
What is the ICD-10 code for ICD-9 556.0?
- The GEMs map 556.0 to ICD-10-CM K51.80.
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.