ICD-10-CM > M00-M99 > M86-M90 > M87 > M87.2 > M87.21 M87.21 Osteonecrosis due to previous trauma, shoulder Non-Billable/Non-Specific Codes M87.211Osteonecrosis due to previous trauma, right shoulderM87.212Osteonecrosis due to previous trauma, left shoulderM87.219Osteonecrosis due to previous trauma, unspecified shoulder