Home
HelpTest Code RF Rheumatoid Factor
Additional Codes
| Epic Ordering Code | LAB206 |
| NBS code | LBC13168 |
| Service code | 31991 |
Specimen Requirements
Submit the following:
| Container: |
| Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | Not available |
| Refrigerate | 2 days |
| Frozen | 1 month |
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Immunoturbidimetry
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
≤ 30 IU/mL
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of rheumatoid arthritis.
Evaluation of ankylosing spondylitis, Sjogren’s syndrome, scleroderma, dermatomyositis, Waldernstrom’s disease and SLE.
Update
Last updated 28/07/2026
LOINC Code Information
11572-5
Alias
RA Factor
Rheumatoid Arthritis