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ICD-9-CM procedure code (retired)

85.43 — Unilateral extended simple 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 85.43

85.43 is an ICD-9-CM procedure code for unilateral extended simple 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 4 ICD-10-PCS codes, such as 07T50ZZ (Resection of Right Axillary Lymphatic, Open Approach), 07T60ZZ (Resection of Left Axillary Lymphatic, Open Approach) and 0HTT0ZZ (Resection of Right Breast, Open Approach). All of these are approximate matches, so review the record to pick the right one. Some mappings are combinations: more than one ICD-10 code is needed to fully express the ICD-9 code.

ICD-10-PCS equivalents

Common questions about 85.43

What is the ICD-10 code for ICD-9 85.43?

The GEMs map 85.43 to ICD-10-PCS 07T50ZZ, 07T60ZZ, 0HTT0ZZ and 0HTU0ZZ.

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.