ICD-10-CM > M00-M99 > M05-M14 > M13 > M13.1 > M13.11 M13.11 Monoarthritis, not elsewhere classified, shoulder Non-Billable/Non-Specific Codes M13.111Monoarthritis, not elsewhere classified, right shoulderM13.112Monoarthritis, not elsewhere classified, left shoulderM13.119Monoarthritis, not elsewhere classified, unspecified shoulder