Test ID: RF
CPT code: 86431
LOINC: 11572-5
Specimen Type: SST
Frequency: Setup: Mon-Fri; TAT 1-3 days
Instructions: >0.5mL serum from SST or red top on fasting patient. Centrifuge as soon as clotted. No hemolysis
Text: Differential diagnosis and prognosis of arthritis.
Methodology: TURBIDITY