Direct Antiglobulin Test (DAT) with Reflex to Anti C3 and Anti IgG : 36668

Message

If submitting with any other test requiring whole blood, please submit a separate whole blood tube for the DAT.

Test Code

QDAT or 36668

Alias/See Also

Coombs Direct; Direct Coombs

CPT Codes
86880

Includes

If DAT (Coombs, Direct) is positive, Anti C3d and Anti IgG will be performed at an additonal charge (CPT code(s): 86880x2).

Instructions

EDTA lavender or pink-top tube or ACD-A or ACD-B (yellow-top) tube.

Transport Container

Submit 5 mL (Min: 1 mL) whole blood tube.

Transport Temperature

Refrigerated.

Specimen Stability

Room temperature: 24 hours; Refrigerated: 72 hours; Frozen: Unacceptable

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

Gross hemolysis, Grossly lipemic, Serum Separator tube, Clotted specimen, Grossly icteric.

Methodology
Agglutination

Setup Schedule

Monday - Friday

Report Available

1-4 days (From receipt at performing laboratory)

Reference Range

Negative

Clinical Significance

The DAT (Direct Coomb's test) is positive if red cells have been coated, in vivo, with immunoglobulin, complement, or both. A positive result can occur in immune-mediated red cell destruction, autoimmune hemolytic anemia, a transfusion reaction or in patients receiving certain drugs.

Performing Laboratory
Quest Diagnostics

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.