Quick Reference
- Full form
- Rheumatoid Factor
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Same day
- Available at
- All locations
About RA Factor
RA Factor is one of the classic tests used to investigate rheumatoid arthritis, though it can also be positive in other autoimmune conditions, which is why it is often paired with Anti CCP testing for better specificity.
No fasting is required, and results are available the same day.
How to Prepare
- No fasting required.
- No special preparation needed before your blood draw.
Frequently Asked Questions
What is RA Factor testing used for?
It helps investigate rheumatoid arthritis, though results are often interpreted alongside Anti CCP for better accuracy.
Do I need to fast before this test?
No fasting is required.
Can RA Factor be positive without rheumatoid arthritis?
Yes, it can be positive in other autoimmune conditions or occasionally in healthy people, so context from your doctor matters.
What symptoms suggest RA Factor testing?
Persistent joint pain, swelling, and stiffness, especially in the hands, are common reasons for this test.
How soon will my report be ready?
Same day.
Is home sample collection available?
Yes, in all City Care Lab service areas.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.