ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.2 > M86.26 M86.26 Subacute osteomyelitis, tibia and fibula Non-Billable/Non-Specific Codes M86.261Subacute osteomyelitis, right tibia and fibulaM86.262Subacute osteomyelitis, left tibia and fibulaM86.269Subacute osteomyelitis, unspecified tibia and fibula