ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.2 > M86.21 M86.21 Subacute osteomyelitis, shoulder Non-Billable/Non-Specific Codes M86.211Subacute osteomyelitis, right shoulderM86.212Subacute osteomyelitis, left shoulderM86.219Subacute osteomyelitis, unspecified shoulder