Without further information, probably the best ICD 9 code for seronegative arthritis would be 714.0, which is the code for rheumatoid arthritis.
274.0 274.0
ICD 9 CM code - 787.91 Diarrhea.
ICD-9-CM code 536.8 is for dyspepsia.
ICD 9 Cm Code for Abrachiocephalia 759.89
ICD 9 Cm Code for Acapnia 276.3
ICD 9 Cm Code for Acardia 759.89
ICD 9 cm Code for Acetonuria 791.6
ICD 9 Cm Code for Birthmark 757.32
ICD 9 Cm Code for Bronchomycosis 112.89
ICD 9 Cm Code for Acanthrocytosis 272.5
ICD 9 Cm Code for Acarbia 276.2