Blood Type Test in California

A blood type test identifies your ABO blood group and Rh factor. It is commonly ordered before transfusions, during pregnancy, or for organ donation.

What it measures

ABO group — Determines if you are type A, B, AB, or O based on markers on red blood cells.
Rh factor — Shows whether you are Rh-positive or Rh-negative, an inherited protein on red blood cells.
Antibody screen — Sometimes included to check for unexpected antibodies against other blood types.

Who it is for

A doctor may order this test before surgery, blood transfusion, pregnancy, or organ transplant. It is also done for donation or if you want to know your blood type.

Preparation

No fasting or special preparation is needed. You can eat and drink normally before the blood draw.

Results and what they mean

Results are reported as your ABO type and Rh status, such as A-positive or O-negative. A clinician interprets the results in your medical context. This is general information, not medical advice.

Requesting the Blood Type 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

Is this test painful?

It uses a standard blood draw from a vein, which feels like a quick pinch.

How long do results take?

Typically 1 to 3 business days, though timing can vary by lab.

Can I eat before the test?

Yes, no fasting is required. Eat and drink as usual.

Will my blood type change over time?

No, your ABO and Rh type are inherited and do not change.

Blood Type Test by city in California

All testing in California → Full Blood Type Test guide →