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Test Code LAB550 Obstetric Panel

Additional Codes

CPT Code: 80055


Profile Information:
Prenatal Type and Screen Hepatitis Bs Antigen (HBsAg)
HIV Ag/Ab Rubella Serology (German Measles), Immunity
Complete Blood Count (CBC) With Differential Syphilis Serology

Reflex Information:

All positive antibody screens will have antibody identified. If antibodies are clinically significant, they will be titered and an aliquot will be frozen for use in comparison in future titers.

Performing Laboratory

Peninsula Regional Medical Center - Hematology, Special Chemistry, Serology, and Transfusion Services

Specimen Requirements

EDTA whole blood, K2 EDTA whole blood, and serum are required.


Blood for Prenatal Type and Screen

Draw blood in a large, pink-top (K2 EDTA) tube, and send 6 mL of K2 EDTA whole blood. (Clotted or hemolyzed specimen is not acceptable.)

Note: 1. Label specimen with patient’s first and last name, medical record number, time of draw, and phlebotomist’s initials.

2. Label specimen appropriately (blood for Antibody Screen and Blood Type, ABO and Rh type).


Blood for CBC with Differential

Specimen must arrive within 24 hours of draw.


Draw blood in a lavender-top (EDTA) tube, and send 4 mL of EDTA whole blood. (Clotted or hemolyzed specimen is not acceptable.)

Note: Label specimen appropriately (blood for CBC).


Serum for HBsAg and HIV Ag/Ab

Draw blood in a plain, red-top tube or a black tiger-top serum gel tube, and send 2 mL of serum refrigerated. (Hemolyzed specimen is not acceptable.)

Note: Label specimen appropriately (serum for HBsAg).


Serum for Rubella, and Syphilis Serology

Draw blood in a plain, red-top tube. (Hemolyzed specimen is not acceptable.) Spin down and send 10 mL of serum refrigerated.

Note: Label specimen appropriately (serum for Rubella and Syphilis Serology).

Reference Values

See individual test listings.