891.0 — Open wound of knee, leg [except thigh], and ankle, without mention of complication

891.0 is an ICD-9-CM diagnosis code for open wound of knee, leg [except thigh], and ankle, without mention of complication. 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 3 ICD-10-CM codes, such as S81.009A (Unspecified open wound, unspecified knee, initial encounter), S81.809A (Unspecified open wound, unspecified lower leg, initial encounter) and S91.009A (Unspecified open wound, unspecified ankle, initial encounter). All of these are approximate matches, so review the record to pick the right one.