ICD-10-CM > M00-M99 > M05-M14 > M05 > M05.8 > M05.81 M05.81 Other rheumatoid arthritis with rheumatoid factor of shoulder Non-Billable/Non-Specific Codes M05.811Other rheumatoid arthritis with rheumatoid factor of right shoulderM05.812Other rheumatoid arthritis with rheumatoid factor of left shoulderM05.819Other rheumatoid arthritis with rheumatoid factor of unspecified shoulder