ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.1 > M86.17 M86.17 Other acute osteomyelitis, ankle and foot Non-Billable/Non-Specific Codes M86.171Other acute osteomyelitis, right ankle and footM86.172Other acute osteomyelitis, left ankle and footM86.179Other acute osteomyelitis, unspecified ankle and foot