A patient seated in the chair before a blood draw
In person

Blood Type (ABO + Rh)

Your ABO blood group and Rh factor, from one blood draw.

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  • 2,000+ lab locations. Find one near you
  • Nothing due at the lab. FSA / HSA accepted
  • Ordered by a licensed clinician

At a glance

Collection
Blood draw
A standard blood draw at the lab.
Preparation
None
Nothing to do ahead of time. Water is fine.
Results
2 to 4 days
Typical turnaround after your visit.
Where
2,000+ lab locations
Nationwide, with nothing due at the lab.

About this test

This test reports your ABO blood group (A, B, AB, or O) and your Rh factor (positive or negative). Blood type generally stays the same for life, so it is usually a one-time test. People check it for their records or for pregnancy planning. It does not replace hospital typing before a transfusion.

For adults 18 and older. Test availability varies by lab location.

Who should take this test?

This test is for adults who want to know their blood type for their personal health records or for pregnancy planning, as a one-time result to keep and share with their care team.

Ask about this test

Not sure this is the right test?

AI-generated. For information only, not medical advice. Call 911 for an emergency.

What does this test measure?

Your result tells you which ABO group you belong to and whether you are Rh positive or Rh negative, a record to keep and share with your healthcare providers when it is useful.

ABO blood group
Your ABO blood group, A, B, AB, or O, depends on markers called antigens on the surface of your red blood cells. It is inherited and generally stays the same for life. Hospitals and blood banks run their own typing before a transfusion, so this result is for your records.
Why it’s measured: Your A, B, AB, or O blood group, an inherited result to keep for your records.
Rh factor (Rh type)
Rh type shows whether your red blood cells carry a marker called the RhD antigen. If they do, you are Rh positive; if not, Rh negative. Rh type matters in pregnancy and for blood transfusions. Hospitals run their own typing before a transfusion, so this result is for your records.
Why it’s measured: Whether you are Rh positive or Rh negative, for your records.

How it works

  1. Step 1

    Order online

    Check out here. A licensed clinician in your state reviews your order and sends it to the lab.

  2. Step 2

    Visit a lab

    Bring a photo ID to any of 2,000+ lab locations. No fasting needed, and nothing is due at the lab.

  3. Step 3

    Get your results

    Results post to your account, usually in 2 to 4 days, each number next to the lab’s reference range.

Find a lab near you

Choose from 2,000+ lab locations nationwide. Your order works at any of them.

What your results tell you

Your result is reported as a blood group (A, B, AB, or O) with an Rh factor, positive or negative, for example O positive.

  • Each marker next to the lab’s reference range
  • Explained in plain language
  • A licensed clinician reviews your order and, if appropriate, orders the test.
  • A lab report you can download and share

Hospitals and prenatal care teams run their own typing. A healthcare provider can explain what your type means for you, such as in pregnancy.

Clinical-grade testing, from the comfort of home.

From the lab to your report, every step of our process meets the gold standard in medical testing.

  • CLIA-certified labs

    Every lab we partner with is certified under the Clinical Laboratory Improvement Amendments, meeting both state and federal standards with regular independent inspections.

  • We protect your health data

    We protect your health data with encryption and do not sell it. Some results must be reported to public health authorities by law. See our Privacy Notice.

  • Rigorous quality assurance

    All partner labs run regular internal quality checks, participate in proficiency testing, and comply with federal and state lab regulations.

  • Clinician-reviewed reports

    Results are reviewed by an independent, licensed clinician.

Questions

Common questions.

Anything else, our care team answers by phone, text, or email.

A, B, AB, and O describe markers called antigens on the surface of your red blood cells. Positive or negative describes whether your red cells carry another marker, the Rh(D) antigen. Together they make up your blood type, such as A positive or O negative.

No. Before any transfusion, a hospital or blood bank runs its own blood type and compatibility testing on a fresh sample. This result is for your records and general information, and it does not replace that testing.

If you plan to donate blood, donation centers type donated blood themselves.

Rh type is part of routine prenatal care. ABO and Rh results help a care team decide who may need Rh immune globulin, a medicine given in some pregnancies.

If you are pregnant or planning, share this result with your prenatal care team. They may run their own blood type and antibody tests.

Your blood type is inherited and generally stays the same throughout life, so it is usually a one-⁠time test. In rare cases, such as after a bone marrow transplant, it can change. Keep your result with your health records so you can share it when a provider asks.

Lab tests are informational and don’t diagnose conditions on their own. Available to adults 18 and older; test availability varies by lab location. A licensed clinician reviews your order and, if appropriate, orders the test. All testing is performed at CLIA-certified laboratories. Not for emergencies: if you think you may be having a medical emergency, call 911.