M06.0 - Rheumatoid arthritis without rheumatoid factor
M06.02 - Rheumatoid arthritis without rheumatoid factor, elbow
M06.021 - Rheumatoid arthritis without rheumatoid factor, right elbow
M06.022 - Rheumatoid arthritis without rheumatoid factor, left elbow
M06.029 - Rheumatoid arthritis without rheumatoid factor, unspecified elbow