ICD-9-CM diagnosis code (retired)
844.9 — Sprains and strains of unspecified site of knee and leg
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 844.9
844.9 is an ICD-9-CM diagnosis code for sprains and strains of unspecified site of knee and leg. 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 S83.90XA (Sprain of unspecified site of unspecified knee, initial encounter) and S86.919A (Strain 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.
ICD-10-CM equivalents
Common questions about 844.9
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.