Skip to content
Dx

ICD-9-CM diagnosis code (retired)

531.91 — Gastric ulcer, unspecified as acute or chronic, without mention of hemorrhage or perforation, with obstruction

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 531.91

531.91 is an ICD-9-CM diagnosis code for gastric ulcer, unspecified as acute or chronic, without mention of hemorrhage or perforation, with obstruction. 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 K25.9 (Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation) and K56.699 (Other intestinal obstruction unspecified as to partial versus complete obstruction). All of these are approximate matches, so review the record to pick the right one. Some mappings are combinations: more than one ICD-10 code is needed to fully express the ICD-9 code.

ICD-10-CM equivalents

Common questions about 531.91

What is the ICD-10 code for ICD-9 531.91?

The GEMs map 531.91 to ICD-10-CM K25.9 and K56.699.

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.