ICD-10-CM > M00-M99 > M00-M02 > M02 > M02.3 > M02.31 M02.31 Reiter's disease, shoulder Non-Billable/Non-Specific Codes M02.311Reiter's disease, right shoulderM02.312Reiter's disease, left shoulderM02.319Reiter's disease, unspecified shoulder