PrEP Use Only: HIV p24 Antigen/Antibody With Reflex to Confirmation
Also known as: HIV antigen/antibody, HIV antigen/antibody with Reflex, HIV PrEP, HIV-1, HIV-2
Use
This test is used for baseline testing and monitoring for HIV in patients administered HIV PrEP (CDC-recommended algorithm for laboratory diagnosis of HIV infection, including acute and primary infection).
Special Instructions
PrEP use only. Contains CPT code modifier for the CARES Act. This test requires a dedicated, unopened, specimen tube sent directly to the testing facility. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample to avoid interference.
Limitations
Reactive (repeatedly) specimens must be investigated by additional supplemental tests. A negative test does not preclude exposure to or infection with HIV-1 and/or HIV-2. Negative results can occur if the marker quantity in the sample is too low for detection or if the marker is not present during the stage of disease during collection.
Methodology
Immunoassay (EIA)
Biomarkers
LOINC Codes
- 75622-1
- 56888-1
- 68961-2
- 81641-3
- 80203-3
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL
Minimum Volume
1 mL
Container
Gel-barrier tube
Collection Instructions
Usual blood collection technique. Do not freeze serum gel tubes; send to the lab refrigerated.
Patient Preparation
Patients should stop biotin consumption at least 72 hours prior to sample collection.
Storage Instructions
Refrigerate.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 7 days |
| Frozen | 14 days |