ICD-9-CM procedure code (retired)
46.91 — Myotomy of sigmoid colon
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-PCS equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 46.91
46.91 is an ICD-9-CM procedure code for myotomy of sigmoid colon. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-PCS took over.
The CMS General Equivalence Mappings translate it to 3 ICD-10-PCS codes, such as 0D7N0ZZ (Dilation of Sigmoid Colon, Open Approach), 0D7N3ZZ (Dilation of Sigmoid Colon, Percutaneous Approach) and 0D7N4ZZ (Dilation of Sigmoid Colon, Percutaneous Endoscopic Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
Common questions about 46.91
What is the ICD-10 code for ICD-9 46.91?
- The GEMs map 46.91 to ICD-10-PCS 0D7N0ZZ, 0D7N3ZZ and 0D7N4ZZ.
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.