HIV Antibody Screening Test (Serum/Plasma)
This test checks for antibodies to the human immunodeficiency virus (HIV), which your body makes in response to the virus. It helps determine if you’ve been exposed to HIV.
["A simple blood test to check for HIV antibodies before enrollment in certain programs."]
Key facts at a glance
- LOINC
- 45231-8
- Short code
- HIVRXPRIORTOENROLLMENT
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- reported
- CPT
- 86701
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test detects HIV antibodies in your blood or plasma. These antibodies are proteins your immune system produces after exposure to the virus. Even if you’ve been infected, your body may take weeks to months to produce detectable levels, so this test is primarily used for screening rather than confirming recent infection.
Why It’s Done Before Enrollment
This screening is often required for programs like HIV prevention initiatives, enrollment in certain healthcare services, or participation in clinical trials. It helps ensure you’re aware of your HIV status before joining these programs to prevent transmission and support appropriate care.
How the Test Works
A small blood sample is taken from your arm. The blood is then tested using an immunoassay method (likely a qualitative immunoassay) to identify HIV antibodies. This process is quick and typically done in a lab or at a clinic.
What to Expect Before the Test
You may need to fast or avoid certain medications for a short time before the test, depending on the specific protocol. Bring any medications you’re currently taking to discuss with your healthcare provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
HIV Antibody Screen
Frequently asked questions
If your test is positive, it means your body has detected HIV antibodies, suggesting past or current infection. However, a positive result does not confirm HIV infection immediately—you’ll need follow-up testing (like a confirmatory HIV antibody test) to determine your status.
This test does not diagnose HIV infection directly but is a first step in screening. If you’re concerned about HIV exposure, discuss your results with your healthcare provider for further evaluation.
What does a positive screening result mean?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy