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Test Code 050 ABO Group and Rh Type

Important Note

For inpatients and intended possible blood recipients: The phlebotomist must check the patient's armband and compare the patient ID number on the armband to the patient ID number on the requisition. The phlebotomist must sign the requisition and indicate the date and time of collection as well as the patient ID number as transcribed from the patient armband to verify that they are the same.

Additional Codes


PowerChart: ABO Group and Rh Type

MA Cerner: ABORh.

Specimen Requirement

A 5mL EDTA purple-top tube is preferred.

Specimens may be held at room temperature for up to 24 hour and 3 days when refrigerated.

Additional Specimen Collection Information

7-10 mL red-top, 5 mL heparin green-top or 5 mL blue-top tubes are also acceptable. Serum and plasma gel tubes are not acceptable. Cord blood may also be tested. Micro specimen may be obtained with a capillary collection device.

Useful For

Selecting compatible blood products for transfusion therapy


Testing is performed Monday through Sunday.

Routine orders: Typically completed within 4 hours; Mercy DV and MA West within 24 hours

Expedite orders: Typically completed within 1 hour after the specimen arrives at the testing site.

STAT orders: Typically completed within 15 minutes after the specimen arrives at the testing site.

CPT Code Information

86900 ABO Group

86901 Rh Type

LOINC Code Information

34530-6 ABO and Rh Group Panel-Blood

Test Method

AABB Standard: Agglutination of red cells with an antiserum represents the presence of the corresponding antigen in the red cells; Ortho Gel Cards. (AABB Technical manual. 14th edition. Edited by V Vengelen-Tyler. Bethesda, MD, American Association of Blood Banks 2002)

Reference Values

Not Applicable