ICD-9-CM procedure code (retired)
29.31 — Cricopharyngeal myotomy
About ICD-9-CM 29.31
29.31 is an ICD-9-CM procedure code for Cricopharyngeal myotomy. 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 0K840ZZ (Division of Tongue, Palate, Pharynx Muscle, Open Approach), 0K843ZZ (Division of Tongue, Palate, Pharynx Muscle, Percutaneous Approach) and 0K844ZZ (Division of Tongue, Palate, Pharynx Muscle, 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 29.31
What is the ICD-10 code for ICD-9 29.31?
- The GEMs map 29.31 to ICD-10-PCS 0K840ZZ, 0K843ZZ and 0K844ZZ.
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.