We have provided a code set below to help you identify those patients with a lab in the JIA or PsA datasets.

The anti-CCP positive/negative status is available via the following three LOINC codes:

  • LOINC Code
  • LOINC Name 53028-7
  • Cyclic citrullinated peptide Ab [Presence] in Serum 63375-0
  • Cyclic citrullinated peptide IgA+IgG Ab [Presence] in Serum 42898-7
  • Cyclic citrullinated peptide IgG Ab [Presence] in Serum

The corresponding codes for the rheumatoid factor (RF) are the following:

  • LOINC Code
  • LOINC Name 33910-1
  • Rheumatoid factor [Presence] in Serum 5297-7
  • Rheumatoid factor [Presence] in Serum by Latex agglutination