ICD-9-CM procedure code (retired)
81.99 — Other operations on joint structures
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 81.99
81.99 is an ICD-9-CM procedure code for other operations on joint structures. 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 0ST50ZZ (Resection of Sacrococcygeal Joint, Open Approach), 0ST60ZZ (Resection of Coccygeal Joint, Open Approach) and 0ST70ZZ (Resection of Right Sacroiliac Joint, Open Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
Common questions about 81.99
What is the ICD-10 code for ICD-9 81.99?
- The GEMs map 81.99 to ICD-10-PCS 0ST50ZZ, 0ST60ZZ, 0ST70ZZ and 0ST80ZZ.
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.