IA-2 antibody test
Quick answer: This blood test looks for IA-2 antibodies, which attack a protein in the insulin-making cells of the pancreas. Doctors usually order it with other diabetes autoantibodies to help tell type 1 diabetes apart from other types.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
How the test is done
- 1A nurse confirms your details and the test requested
- 2A small needle draws blood from your arm
- 3The blood tube is labelled and sent to the lab
- 4Ask the hospital what this test is being used for in your case
What your results can mean
Reading your report
Ranges and cut-offs differ between labs and methods, so discuss your result with your doctor.
If the result is outside the usual range
A positive result can support an autoimmune cause of diabetes, but it needs to be read with other tests. Ask the hospital or your doctor what the test is checking for you.
Who usually has this test
People whose doctor is checking the type or cause of diabetes; ask the hospital whether this test suits your situation.
Risks and aftercare
A small bruise can appear where the needle went in; ask the hospital about any follow-up tests.
Names and options
Also called: IA-2, IA2 antibody, islet antigen 2 antibody, diabetes autoantibody
Listed by the hospital as
- INSULIN AUTOANTIBODIES (IA2)
Questions about this test
What is the IA-2 antibody test for?
It is generally used with other autoantibody tests when doctors want to know whether diabetes has an autoimmune cause. Because test names can vary, ask the hospital to confirm exactly what this test measures.
Do I need to fast for an IA-2 antibody test?
Fasting is not usually needed for antibody tests. If your doctor has ordered other tests at the same time, such as blood sugar, ask whether those need fasting.
Can a negative IA-2 antibody rule out type 1 diabetes?
No. Not everyone with type 1 diabetes has this antibody, so doctors look at several antibodies, blood sugar levels and your history together.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.