ICD-10-CM > M00-M99 > M05-M14 > M06 > M06.3 > M06.31 M06.31 Rheumatoid nodule, shoulder Non-Billable/Non-Specific Codes M06.311Rheumatoid nodule, right shoulderM06.312Rheumatoid nodule, left shoulderM06.319Rheumatoid nodule, unspecified shoulder