Check your medical records from your doctor, hospital, or blood donation center
Ask your primary care doctor to order a blood type test
Donate blood and ask the blood center for your blood type
Use an at-home blood typing kit
Ask if your prenatal care records include your blood type
Ask your parents if they know your blood type, then confirm with a test
Get tested at a clinic, urgent care center, or laboratory
Check any old lab results or immunization records that may list your blood type