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HIV Antibody Screening Test (Serum/Plasma)

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to the human immunodeficiency virus (HIV), which your body produces in response to infection. It helps determine if you may have been exposed to HIV.

Quick summary

["This screening test is the first step in checking for HIV infection."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
6429-5
Short code
HIV Bld Cult
Synonyms
HIV Bld Cult
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
organism-specific-culture
CPT
86701
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

The test looks for HIV antibodies in your blood or plasma. Antibodies are proteins your immune system makes to fight infections. If you have been exposed to HIV, your body will produce these antibodies within weeks to months after exposure.

How the Test Works

Your blood sample is tested using an immunoassay method, which detects the presence of HIV antibodies. This test is designed to be highly sensitive and specific for early detection of HIV infection.

Why It’s Done

Healthcare providers may recommend this test if you have risk factors for HIV, such as unprotected sexual contact, shared needles, or other behaviors that increase exposure risk. It is also part of routine testing for certain groups, like pregnant women or people with sexually transmitted infections.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you are pregnant or have a history of bleeding disorders, let your healthcare provider know before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is critical for early diagnosis of HIV, as it allows for prompt treatment and management. Early detection improves outcomes and helps prevent the progression of HIV to AIDS. Results should be interpreted by a healthcare professional in the context of your medical history and symptoms.

Short name

HIV Antibody Screen

Frequently asked questions

How soon can I get results from this test?
Results are typically available within a few days to a week, depending on your healthcare provider’s lab processes. Follow-up testing may be needed if the initial screening result is positive.
What does a positive result mean?
A positive result means your blood contains antibodies to HIV, indicating possible infection. You will need further testing, such as a confirmatory HIV antibody test or viral load test, to confirm the diagnosis. Always consult your healthcare provider for guidance.
Can I have false-positive results?
While rare, false-positive results can occur due to cross-reactions with other substances or infections. If your initial test is positive, additional testing will be done to confirm the result accurately.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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