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HelpTest Code HIV HIV AG/AB, 4TH GEN, Reflex
Additional Codes
LAB23457
Performing Laboratory
Central Peninsula Hospital
Collection Method
Venipuncture
Container
Purple Top EDTA
Specimen Type
Purple EDTA
Minimum Volume
1ml (5ml for reflex testing)
Specimen Stability
| Ambient | 2 days |
| Refrigerated (4°C to 8°C) | 7 days |
| Frozen(-70°C to 0°C) | 1 month |
Reference or Target Ranges
Negative
Reportable Units
| Result | Report | Report Comment |
| HIV ½ ANTIBODY NONREACTIVE | Negative | A negative result does not rule out HIV infection. In patients with symptoms or high-risk history, results should be interpreted with caution. Repeat testing in 1 to 2 months is recommended for at-risk individuals. |
| ANTIGEN (HIV-1 p24) NONREACTIVE | Negative | None |
| HIV ½ ANTIBODY REACTIVE | Reactive | A REACTIVE result is a PRELIMINARY POSITIVE for HIV-1 and/or HIV-2 antibodies. The specimen will be sent to Mayo Medical Laboratories for confirmatory testing. |
| ANTIGEN (HIV-1 p24) REACTIVE | Reactive | A REACTIVE result is a PRELIMINARY POSITIVE for HIV-1 p24 antigen. When p24 antigen is detected without HIV-1 or HIV-2 antibodies, it may indicate an acute HIV-1 infection. The specimen will be sent to Mayo Medical Laboratories for confirmatory testing. |
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | N/A |
| Icterus Threshold | N/A |
| Lipemia Threshold | N/A |
| Other | Plasma samples, clotted, QNS, contaminated, improperly labeled, improper container |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time | Stat within 1 hours of arrival in lab Routine within 4 hours of arrival in lab |
| Stat Availabilty | Yes |
| Performing Bench | CPH Serology |
| Methodology/Method Description | Alere Determine HIV 1/2 Ag/Ab Combo Screen |
Reflex Testing
| Result | Reflex testing |
| REACTIVE HIV ½ ANTIBODY | LAB24170 HIV ½ AB DIFFERENTIATION will automatically reflex. This test is performed by Mayo Clinic Laboratories and is mapped to mayo test ID HVDIP. |
| NEGATIVE HIV ½ ANTIBODY with a REACTIVE HIV-1 p24 ANTIGEN | LAB25680 HIV-1/HIV-2 Qualitative RNA HIV 1, RNA, NAAT, QUANT will automatically reflex. This test is performed by Mayo Clinic Laboratories and is mapped to mayo test ID HIVQN. |
CPT Codes
HIV AG/AB, 4TH GEN, Reflex - 87806
HIV ½ AB DIFFERENTIATION - 86701, 86702, 87535 (if appropriate), 87538 (if appropriate), 87536 (if appropriate)
HIV-1/HIV-2 Qualitative RNA HIV 1, RNA, NAAT, QUANT - 87536
Last review/edit date
2025