ICD-9-CM diagnosis code (retired)
171.5 — Malignant neoplasm of connective and other soft tissue of abdomen
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 171.5
171.5 is an ICD-9-CM diagnosis code for malignant neoplasm of connective and other soft tissue of abdomen. 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 8 ICD-10-CM codes, such as C49.4 (Malignant neoplasm of connective and soft tissue of abdomen), C49.A0 (Gastrointestinal stromal tumor, unspecified site) and C49.A1 (Gastrointestinal stromal tumor of esophagus). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- C49.4Malignant neoplasm of connective and soft tissue of abdomenapproximate
- C49.A0Gastrointestinal stromal tumor, unspecified siteapproximate
- C49.A1Gastrointestinal stromal tumor of esophagusapproximate
- C49.A2Gastrointestinal stromal tumor of stomachapproximate
- C49.A3Gastrointestinal stromal tumor of small intestineapproximate
- C49.A4Gastrointestinal stromal tumor of large intestineapproximate
- C49.A5Gastrointestinal stromal tumor of rectumapproximate
- C49.A9Gastrointestinal stromal tumor of other sitesapproximate
Common questions about 171.5
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.