ICD-9-CM diagnosis code (retired)
174.9 — Malignant neoplasm of breast (female), unspecified
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 174.9
174.9 is an ICD-9-CM diagnosis code for malignant neoplasm of breast (female), unspecified. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, C50.919 (Malignant neoplasm of unspecified site of unspecified female breast). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- C50.919Malignant neoplasm of unspecified site of unspecified female breastapproximate
Common questions about 174.9
What is the ICD-10 code for ICD-9 174.9?
- The GEMs map 174.9 to ICD-10-CM C50.919.
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.