Icd 10 code for rheumatoid arthritis with rheumatoid factor unspecified July 8, 2019 16 32 64 128 Icd 10 code for rheumatoid arthritis with rheumatoid factor of unspecified site Icd 10 code for rheumatoid arthritis without rheumatoid factor unspecified site Icd 10 code for rheumatoid arthritis with positive rheumatoid factor involving unspecified site