844 Sprains and strains of knee and leg 
844.0 Sprain of lateral collateral ligament of knee convert 844.0 to ICD-10-CM 844.1 Sprain of medial collateral ligament of knee convert 844.1 to ICD-10-CM 844.2 Sprain of cruciate ligament of knee convert 844.2 to ICD-10-CM 844.3 Sprain of tibiofibular (joint) (ligament) superior of knee convert 844.3 to ICD-10-CM 844.8 Sprain of other specified sites of knee and leg convert 844.8 to ICD-10-CM
844.9 Sprain of unspecified site of knee and leg convert 844.9 to ICD-10-CM