ICD-9-CM procedure code (retired)
84.91 — Amputation, not otherwise specified
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 84.91
84.91 is an ICD-9-CM procedure code for amputation, not otherwise specified. 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 0Y620ZZ (Detachment at Right Hindquarter, Open Approach), 0Y630ZZ (Detachment at Left Hindquarter, Open Approach) and 0Y640ZZ (Detachment at Bilateral Hindquarter, Open Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
Common questions about 84.91
What is the ICD-10 code for ICD-9 84.91?
- The GEMs map 84.91 to ICD-10-PCS 0Y620ZZ, 0Y630ZZ and 0Y640ZZ.
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.