ICD-9-CM diagnosis code (retired)
891.2 — Open wound of knee, leg [except thigh], and ankle, with tendon involvement
About ICD-9-CM 891.2
891.2 is an ICD-9-CM diagnosis code for open wound of knee, leg [except thigh], and ankle, with tendon involvement. 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 5 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 S86.929A (Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter). 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
- S81.009AUnspecified open wound, unspecified knee, initial encounterapproximate · combination (scenario 1, choice 2)
- S81.809AUnspecified open wound, unspecified lower leg, initial encounterapproximate · combination (scenario 1, choice 2)
- S86.929ALaceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounterapproximate · combination (scenario 1, choice 1)
- S91.009AUnspecified open wound, unspecified ankle, initial encounterapproximate · combination (scenario 2, choice 2)
- S96.929ALaceration of unspecified muscle and tendon at ankle and foot level, unspecified foot, initial encounterapproximate · combination (scenario 2, choice 1)
Common questions about 891.2
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.