MICHIGAN INNOVATIVE DIAGNOSTICS

Autoantibody screen supporting diagnosis of rheumatoid arthritis.​

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LIS TEST CODE: RF

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CPT CODE: 86431

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ALIASES: RF, RA (Rheumatoid Arthritis) Factor

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METHODOLOGY: Immunoturbidimetric

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SPECIMEN:

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- Type: Serum

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- Container: Gold Top (SST) Vacutainer

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- Minimum Volume Required: 1 mL

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- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen at either room temperature or in the refrigerator until testing can be performed.

 

NOTE: If freezing is required to preserve stability, transfer serum into a separate plastic screw-cap transport container.

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- Stability:     Room Temperature (20-25 °C): 1 day

 

Refrigerated (2-8 °C): 3 days

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                        Frozen (-20 °C or colder): Not Accepted​

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- Turnaround Time: 24 - 48 hours from receipt.

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Special Instructions: N/A

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REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

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REFERENCE RANGES:

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Males & Females (IU/mL)

​>= 1 year of age: < 15.0​

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