ICD-9-CM diagnosis code (retired)
211.8 — Benign neoplasm of retroperitoneum and peritoneum
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 211.8
211.8 is an ICD-9-CM diagnosis code for benign neoplasm of retroperitoneum and peritoneum. 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 2 ICD-10-CM codes, such as D20.0 (Benign neoplasm of soft tissue of retroperitoneum) and D20.1 (Benign neoplasm of soft tissue of peritoneum). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 211.8
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.