HIV Antibody Screening Test (Serum/Plasma)
This test detects antibodies to the human immunodeficiency virus (HIV), which your body produces in response to infection. It helps determine if you’ve been exposed to HIV.
["This screening identifies potential HIV exposure for further evaluation."]
Key facts at a glance
- LOINC
- 12855-3
- Short code
- HIV1 p23 Ab Ser Ql IB
- Synonyms
- HIV1 p23 Ab Ser Ql IB
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ib
- 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 Does This Test Measure?
The test looks for specific antibodies in your blood or plasma that your immune system makes after exposure to HIV. These antibodies are markers that your body creates to fight the virus, but they may take weeks to months to develop after infection.
How Is the Sample Collected?
A blood sample is drawn from a vein in your arm. You may feel a small pinch, but it usually doesn’t cause significant discomfort. The sample is then sent to a lab for testing.
Why Might You Need This Test?
Your healthcare provider may recommend this test if you have risk factors for HIV, such as unprotected sex, shared needles, or other behaviors that increase exposure risk. It’s also part of routine testing for certain groups (e.g., pregnant individuals, people with sexually transmitted infections).
What Are the Next Steps If Results Are Positive?
A positive screening result means your antibodies are present, but it doesn’t confirm HIV infection immediately. Your provider will likely order a confirmatory test (like a Western Blot or fourth-generation HIV test) to check for HIV antibodies and viral load. Follow-up testing helps confirm or rule out infection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
HIV Antibody Screen
Frequently asked questions
Early detection of HIV is crucial because it allows for timely treatment that can slow disease progression, improve health outcomes, and reduce the risk of transmitting the virus to others. Untreated HIV can weaken your immune system over time, increasing vulnerability to infections and certain cancers.
A positive screening result indicates that your blood contains antibodies to HIV, suggesting past or current exposure. This does not confirm HIV infection alone—your provider will guide you through next steps, such as confirmatory testing, to determine if you have active HIV.
HIV antibodies may take 2–12 weeks to develop after exposure, but some people test positive sooner. If you’ve been exposed recently, your provider may recommend testing sooner (e.g., within 1–3 months) or use a test that detects HIV RNA (viral load) instead of antibodies.
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