ICD-9-CM diagnosis code (retired)
171.4 — Malignant neoplasm of connective and other soft tissue of thorax
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 171.4
171.4 is an ICD-9-CM diagnosis code for malignant neoplasm of connective and other soft tissue of thorax. 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, C49.3 (Malignant neoplasm of connective and soft tissue of thorax). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- C49.3Malignant neoplasm of connective and soft tissue of thoraxapproximate
Common questions about 171.4
What is the ICD-10 code for ICD-9 171.4?
- The GEMs map 171.4 to ICD-10-CM C49.3.
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.