ICD-9-CM procedure code (retired)
85.23 — Subtotal mastectomy
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 85.23
85.23 is an ICD-9-CM procedure code for subtotal mastectomy. 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 6 ICD-10-PCS codes, such as 0HBT0ZZ (Excision of Right Breast, Open Approach), 0HBT3ZZ (Excision of Right Breast, Percutaneous Approach) and 0HBU0ZZ (Excision of Left Breast, Open Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 0HBT0ZZExcision of Right Breast, Open Approachapproximate
- 0HBT3ZZExcision of Right Breast, Percutaneous Approachapproximate
- 0HBU0ZZExcision of Left Breast, Open Approachapproximate
- 0HBU3ZZExcision of Left Breast, Percutaneous Approachapproximate
- 0HBV0ZZExcision of Bilateral Breast, Open Approachapproximate
- 0HBV3ZZExcision of Bilateral Breast, Percutaneous Approachapproximate
Common questions about 85.23
What is the ICD-10 code for ICD-9 85.23?
- The GEMs map 85.23 to ICD-10-PCS 0HBT0ZZ, 0HBT3ZZ, 0HBU0ZZ, 0HBU3ZZ, 0HBV0ZZ and 0HBV3ZZ.
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.