ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.1 > M86.16 M86.16 Other acute osteomyelitis, tibia and fibula Non-Billable/Non-Specific Codes M86.161Other acute osteomyelitis, right tibia and fibulaM86.162Other acute osteomyelitis, left tibia and fibulaM86.169Other acute osteomyelitis, unspecified tibia and fibula