Icd 10 code for seronegative arthritis unspecified July 8, 2019 16 32 64 128 Icd 10 code for seronegative rheumatoid arthritis unspecified Icd 10 seronegative rheumatoid arthritis Seronegative arthritis icd 10 Icd 10 code seropositive rheumatoid arthritis