ICD-9-CM procedure code (retired)
44.21 — Dilation of pylorus by incision
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 44.21
44.21 is an ICD-9-CM procedure code for dilation of pylorus by incision. 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 0D770ZZ (Dilation of Stomach, Pylorus, Open Approach), 0D773ZZ (Dilation of Stomach, Pylorus, Percutaneous Approach) and 0D774ZZ (Dilation of Stomach, Pylorus, 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 44.21
What is the ICD-10 code for ICD-9 44.21?
- The GEMs map 44.21 to ICD-10-PCS 0D770ZZ, 0D773ZZ and 0D774ZZ.
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.