Quick Reference
- Full form
- HLA B27
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Next day
- Available at
- All locations
About HLA B27
HLA B27 is a genetic marker linked to certain autoimmune conditions, most notably ankylosing spondylitis, a form of arthritis affecting the spine. It is ordered when a patient has chronic back pain with features suggesting an autoimmune cause.
No fasting is required, and results are available the next day.
How to Prepare
- No fasting required.
- This test is usually ordered by a specialist, bring your referral if you have one.
Frequently Asked Questions
What is HLA B27 testing used for?
It checks for a genetic marker linked to autoimmune conditions, most notably ankylosing spondylitis.
Do I need to fast before this test?
No fasting is required.
What symptoms suggest HLA B27 testing?
Chronic lower back pain and stiffness, especially worse in the morning and improving with movement, are common reasons for this test.
Does a positive result confirm the diagnosis?
Not on its own, since some people carry the gene without developing disease, so your doctor interprets it alongside your symptoms and imaging.
How soon will my report be ready?
Next 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.