ICD-9-CM diagnosis code (retired)
170.6 — Malignant neoplasm of pelvic bones, sacrum, and coccyx
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 170.6
170.6 is an ICD-9-CM diagnosis code for malignant neoplasm of pelvic bones, sacrum, and coccyx. 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, C41.4 (Malignant neoplasm of pelvic bones, sacrum and coccyx). The match is exact.
ICD-10-CM equivalents
- C41.4Malignant neoplasm of pelvic bones, sacrum and coccyxexact match
Common questions about 170.6
What is the ICD-10 code for ICD-9 170.6?
- The GEMs map 170.6 to ICD-10-CM C41.4.
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.