Test Code RA Rheumatoid Factor, Serum
Performing Laboratory
MaineGeneral Medical Center
Specimen Requirements
Serum
Draw blood in a gold-top (serum separater) gel tube. For pediatric specimens, draw blood in a red-top MICROTAINER(S)®. Label the specimen with the patient's name (first and last), date of birth, date and time of draw and the phlebotomist's initials. Spin down and send 1 mL of serum refrigerated.
Specimen stability:
8 hours at room temperature
7 days refrigerated at 2-8°C
3 months when frozen at ≤ -20°C
Minimum volume:
1 mL
Specimen rejection criteria:
Grossly hemolyzed or lipemic samples will not be accepted.
Day(s) Test Performed
Monday - Friday
Test Classification and CPT Coding
86431
Reference Values
0-15 IU/mL