Test Name: RHEUMATOID FACTOR (RF) WITH REFLEX TITER
Test Code: 2320097
Alias: RA
RF with reflex titer
Rheumatoid Arthritis Factor with reflex titer
CPT Code(s): 86430  
Preferred Specimen: 1.0 mL serum
Container: SST (gold)
Minimum Volume: 0.5 mL serum
This volume does not allow for repeat testing.
Collection Instructions: Allow specimen to completely clot (this can take up to 60 minutes). Centrifuge for 15 minutes. The serum should be physically separated from contact with cells within 2 hours from the time of collection.
Transport Temperature: Refrigerated
Stability: Refrigerated: 8 days
Rejection Criteria: Hemolysis
Gross lipemia
Additional Information: A positive RF will trigger a semi-quantitative titer. Additional charges/CPT codes may apply.
Schedule: Testing performed Sunday - Friday
Method: Latex Agglutination
Clinical Significance:

High levels of rheumatoid factor in the blood are most often associated with autoimmune diseases, such as rheumatoid arthritis and Sjogren's syndrome. In at least 70-80% of patients with rheumatoid arthritis, the existence of rheumatoid factor can be proven through significant titers.  The higher titers are usually related with the most serious cases of rheumatoid arthritis. But rheumatoid factor may be detected in some healthy people, and people with autoimmune diseases sometimes have normal levels of rheumatoid factor.
Reference Ranges:

Negative

Titer:  0-9 IU/mL

The CPT codes included in this publication are in accordance with Current Procedural Terminology, a publication of the American Medical Association. CPT codes are provided here for the convenience of our clients; however, correct coding often varies from one carrier to another, and HealthLab may bill specific carriers using codes other than those shown. Clients who bill for services should verify the code(s) with the applicable payor to confirm that their use is appropriate in each case.
Test Type:

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2635 Church Road, Suite 101|Aurora, IL 60502

Telephone: 630.315.6900|Fax: 630.315.6918

TTY: 711

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7:30 am to 4:30 pm

Open daily; closed on holidays

This location is part of Northwestern Medicine, and staff members are able to access electronic medical records.