--- M87.261 Osteonecrosis due to previous trauma, right tibia

--- M87.262 Osteonecrosis due to previous trauma, left tibia

--- M87.263 Osteonecrosis due to previous trauma, unspecified tibia

--- M87.264 Osteonecrosis due to previous trauma, right fibula

--- M87.265 Osteonecrosis due to previous trauma, left fibula

--- M87.266 Osteonecrosis due to previous trauma, unspecified fibula