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Test ID ABYSR Antibody Screen with Reflexed Antibody Identification, Blood

Shipping Instructions

Specimen must arrive within 72 hours of collected.

Specimen Required

Container/Tube: Pink top (EDTA)

Specimen Volume: 6 mL

Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.

Useful For

Detection of allo- or autoantibodies directed against red blood cell antigens in the settings of pretransfusion testing


Evaluation of transfusion reactions


Evaluation of hemolytic anemia

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
ABIDR Antibody Identification, RBC Yes No
ABTIR Antibody Titer, RBC Yes No

Testing Algorithm

If the antibody screen is positive, then antibody identification will be performed.

If the patient has a history of antibodies that are still detected, the antibody screen will be canceled and replaced by the antibody identification.

If certain antibodies are detected and the patient is known to be pregnant, an antibody titration will be performed.

Method Name


Reporting Name

Antibody Screen, RBC

Specimen Type

Whole Blood EDTA

Specimen Minimum Volume

3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood EDTA Refrigerated (preferred) 4 days
  Ambient  4 days

Reference Values


If positive, antibody identification will be performed.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
ABYSR Antibody Screen, RBC 890-4


Result ID Test Result Name Result LOINC Value
ABYSR Antibody Screen, RBC 890-4


If not ordering electronically, complete, print, and send a Benign Hematology Test Request Form (T755) with the specimen.

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days