M06.0 - Rheumatoid arthritis without rheumatoid factor
M06.07 - Rheumatoid arthritis without rheumatoid factor, ankle and foot
M06.071 - Rheumatoid arthritis without rheumatoid factor, right ankle and foot
M06.072 - Rheumatoid arthritis without rheumatoid factor, left ankle and foot
M06.079 - Rheumatoid arthritis without rheumatoid factor, unspecified ankle and foot