ICD-9-CM procedure code (retired)
79.21 — Open reduction of fracture without internal fixation, humerus
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 79.21
79.21 is an ICD-9-CM procedure code for open reduction of fracture without internal fixation, humerus. 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 4 ICD-10-PCS codes, such as 0PSC0ZZ (Reposition Right Humeral Head, Open Approach), 0PSD0ZZ (Reposition Left Humeral Head, Open Approach) and 0PSF0ZZ (Reposition Right Humeral Shaft, Open Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
Common questions about 79.21
What is the ICD-10 code for ICD-9 79.21?
- The GEMs map 79.21 to ICD-10-PCS 0PSC0ZZ, 0PSD0ZZ, 0PSF0ZZ and 0PSG0ZZ.
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.