ICD-10-CM > M00-M99 > M86-M90 > M89 > M89.7 > M89.76 M89.76 Major osseous defect, lower leg Non-Billable/Non-Specific Applicable To Major osseous defect of fibula and tibia Codes M89.761Major osseous defect, right lower legM89.762Major osseous defect, left lower legM89.769Major osseous defect, unspecified lower leg