S89.9 Unspecified injury of lower legNon-billable header with 3 child codes.
S89.90 Unspecified injury of unspecified lower legS89.91 Unspecified injury of right lower legS89.92 Unspecified injury of left lower legM23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")S89.81XS Other specified injuries of right lower leg, sequelaS89.82 Other specified injuries of left lower legS89.82XA Other specified injuries of left lower leg, initial encounterS89.82XD Other specified injuries of left lower leg, subsequent encounterS89.82XS Other specified injuries of left lower leg, sequelaS89.9 Unspecified injury of lower leg (this code)S89.90 Unspecified injury of unspecified lower legS89.90XA Unspecified injury of unspecified lower leg, initial encounterS89.90XD Unspecified injury of unspecified lower leg, subsequent encounterS89.90XS Unspecified injury of unspecified lower leg, sequelaS89.91 Unspecified injury of right lower leg