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Labcorp Oklahoma, Inc.
Test Directory


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HIV Antigen/Antibody Screen, 4th Gen

Order Name HIV AG/AB
Test Number: 3609705
Revision Date 01/04/2024
Test Name Methodology LOINC Code
HIV Antigen/Antibody Screen, 4th Gen
Immunoassay (IA) 56888-1 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 3.0mL (2.0mL) Serum Clot Activator SST Refrigerated
Alternate 1 3.0mL (2.0mL) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Instructions Please submit original, un-opened serum separator tube.
Allow to 15-20 minutes to clot then Centrifuge - Do Not Open!
Stability: Ambient 3 days, refrigerated 7 days, Frozen >7 days

Keep Specimens Refrigerated for best stability.
GENERAL INFORMATION
Testing Schedule Mon - Fri 
Expected TAT 1-3 days  
Notes HIV-1/2 Antibody Differentiation will be performed at an additional charge (CPT code(s): 86701, 86702).
Reflex Order code: HIV-1/2 Antibody Differentiation [3609707]
Reflex Result code: HIV 1 Antibody [3609713]  LOINC: 68961-2
Reflex Result code: HIV 2 Antibody [3609717]  LOINC: 81641-3

If HIV-1/2 Antibody Differentiation is Indeterminate or Negative, HIV-1/HIV-2 Qualitative RNA will be performed
at an additional charge (CPT code(s): 87538, 87535).
Reflex Order code: HIV-1/HIV-2 Qualitative RNA [5194321]
Reflex Result code: HIV-1 Qualitative RNA [5194322] LOINC: 25835-0
Reflex Result code: HIV-2 Qualitative RNA [5194323] LOINC: 69353-1
CPT Code(s) 87389 (See possible Reflex codes in Notes Section.)
 
Lab Section Chemistry