S83.4 - Sprain of collateral ligament of knee
S83.40 - Sprain of unspecified collateral ligament of knee
S83.401 - Sprain of unspecified collateral ligament of right knee
S83.402 - Sprain of unspecified collateral ligament of left knee
S83.409 - Sprain of unspecified collateral ligament of unspecified knee