Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
Low IgA is fairly common and can cause a falsely negative celiac test.
Why it's done
- Frequent or severe infections
- Celiac testing
- Possible myeloma
Getting ready and what happens
- No preparation is needed.
How the test is done
- A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.
What the results mean
Low
May need more immune testing or antibody replacement.
High
Often from infection, liver disease, or autoimmune disease; a single type very high may need SPEP.
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Related tests
Sources
Last updated 2026-11-13.