ANTIGEN TYPING

Test Code

AGID

Alias/See Also

Antigen identification; Phenotyping

CPT Codes
86905

Preferred Specimen

Pink Tube (EDTA)

Minimum Volume

1mL (6mL optimal)

Other Acceptable Specimens

Lavender Tube (EDTA)

Transport Container

One Pink Tube

Transport Temperature

Room Temperature

Specimen Stability

Store at 1-6 °C if not tested immediately. Sample can be tested for up to three days after collection.

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Specimen drawn in wrong tube; grossly hemolyzed specimen; improperly labeled; quantity not sufficient for analysis

Methodology
Hemagglutination

Setup Schedule

Daily, 24 hours

Report Available

Typically within 2 hours

Limitations

Some red cell antigens may not be tested for if the patient has a positive direct Coombs' test. Results may not be valid if the patient has been transfused in the last 3 months.

Clinical Significance

Ascertain the likelihood of an Rh-positive child in genetic counseling; other antigen typings are used to include or exclude antibody specificities or ascertain the likelihood of hemolytic disease of the newborn in cases of maternal antibody; find compatible blood for recipients who have certain atypical antibodies; test the phenotype of the husband to a woman sensitized to blood group antigen.Usually performed on patients in whom antibodies are encountered, to support identification of antibody, typing of donor units to assure that they lack the antigen for which the patient has an antibody.

Performing Laboratory
Mount Sinai Hospital
Holy Cross Hospital

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.