ICD-9-CM diagnosis code (retired)
564.1 — Irritable bowel syndrome
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 564.1
564.1 is an ICD-9-CM diagnosis code for irritable bowel syndrome. 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 4 ICD-10-CM codes, such as K58.1 (Irritable bowel syndrome with constipation), K58.2 (Mixed irritable bowel syndrome) and K58.8 (Other irritable bowel syndrome). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 564.1
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.