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HelpTest Code RF Rheumatoid Factor
Specimen Type
Blood
Container
Mint green top with gel separator
Preferred Volume
4 mL
Availability
Monday – Friday 7:00 a.m. – 3:00 p.m.
Turnaround Time
24 – 72 hrs
STAT Availability
Not Available
Test Usage
Measurements may be used as an aid in the diagnosis of rheumatoid arthritis.
Test Methodology
Immunoturbidimetry
CPT Code
86431
Test Includes
quantitative in vitro determination of rheumatoid factors in plasma
Reference Range
< 14 IU/mL
Critical Results
None
Test Limitations
Rheumatoid factors are also found in other inflammatory rheumatic diseases and in various non-rheumatic diseases. They are also found in clinically healthy persons over 60 years of age.
Minimum Volume
2 mL
Fee Code
43061