LabInformationLab tests, explained

IgA Lab Test in California

IgA Lab Test is a laboratory test you can order directly. The IgA lab test measures the amount of immunoglobulin A (IgA), an antibody that helps protect mucous membranes in the respiratory and digestive tracts. It is ordered to evaluate immune function, screen for IgA deficiency, or monitor conditions like celiac disease and chronic infections. California residents in Pacific can request the iga lab test online and choose a convenient collection point.

Sample type
blood
Category
Protein
Turnaround
1-3 business days
Price
$45
Referral
Not required

The IgA lab test measures the amount of immunoglobulin A (IgA), an antibody that helps protect mucous membranes in the respiratory and digestive tracts. It is ordered to evaluate immune function, screen for IgA deficiency, or monitor conditions like celiac disease and chronic infections.

What it measures

  • Total IgA — Overall level of IgA antibody in the blood.
  • IgA subclass 1 — One of two subtypes; helps pinpoint specific deficiencies.
  • IgA subclass 2 — The other subtype; often checked if total IgA is low.

Who it is for

A doctor may order this test if you have frequent infections, digestive problems, or symptoms suggesting an immune disorder. It is also used before certain celiac disease tests that rely on IgA.

Preparation

No fasting or special preparation is needed. Tell your doctor about any medications or recent illnesses, as they can affect results.

Results and what they mean

Results are reported as a number with a reference range, typically in milligrams per deciliter (mg/dL). Your clinician interprets the value along with your symptoms and other tests. This is general information, not medical advice; discuss your results with a healthcare professional.

Requesting the IgA Lab Test in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. With coastal metros, inland towns, and rural counties with very different access to testing, it pays to schedule your collection in advance.

Frequently asked questions

What does a low IgA result mean?

It may indicate IgA deficiency, which can be inherited or linked to other conditions. Some people with low IgA have no symptoms, but your doctor will evaluate further.

Can I eat before the test?

Yes, no fasting is required. Eat and drink normally unless your doctor gives other instructions.

How long do results take?

Typically 1–3 business days, but this can vary by lab and location.

Is this test covered by insurance?

Coverage depends on your plan and medical necessity. Check with your insurance provider before testing.

IgA Lab Test by city in California

All testing in California →   Full IgA Lab Test guide →