S88.1 - Traumatic amputation at level between knee and ankle
S88.12 - Partial traumatic amputation at level between knee and ankle
S88.121 - Partial traumatic amputation at level between knee and ankle, right lower leg
S88.122 - Partial traumatic amputation at level between knee and ankle, left lower leg
S88.129 - Partial traumatic amputation at level between knee and ankle, unspecified lower leg