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ICD-9-CM procedure code (retired)

85.0 — Mastotomy

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 85.0

85.0 is an ICD-9-CM procedure code for Mastotomy. 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 71 ICD-10-PCS codes, such as 0H9T00Z (Drainage of Right Breast with Drainage Device, Open Approach), 0H9T0ZZ (Drainage of Right Breast, Open Approach) and 0H9U00Z (Drainage of Left Breast with Drainage Device, Open Approach). All of these are approximate matches, so review the record to pick the right one.

ICD-10-PCS equivalents

Common questions about 85.0

What is the ICD-10 code for ICD-9 85.0?

The GEMs map 85.0 to ICD-10-PCS 0H9T00Z, 0H9T0ZZ, 0H9TX0Z, 0H9TXZZ, 0H9U00Z, 0H9U0ZZ and 65 more.

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.