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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) in your blood or plasma. It helps determine if you’ve been exposed to HIV, even if you don’t yet have symptoms.

Quick summary

["A simple blood test to check for HIV antibodies, often used as part of routine screening or after potential exposure."]

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

Key facts at a glance

LOINC
29893-5
Short code
HIV1 Ab SerPl Ql IA
Synonyms
HIV1 Ab SerPl Ql IA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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

Why This Test Matters

HIV antibodies can appear in your blood within weeks to months after exposure. This test is the first step in diagnosing HIV and can help guide next steps, such as treatment or prevention strategies.

How the Test Works

Your blood or plasma sample is tested using an immunoassay method to identify HIV antibodies. If antibodies are found, further testing (like a confirmatory HIV antibody test) may be needed to confirm the result.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or hand to draw blood. If you’re nervous, let your healthcare provider know—they can help make the process more comfortable.

What to Expect After the Test

You can return to your normal activities right after the test. There may be a slight bruise or soreness at the injection site, but this usually fades quickly. If you experience heavy bleeding or severe pain, contact your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive result means your body has detected HIV antibodies, indicating past or recent exposure. A negative result suggests no detectable antibodies at the time of testing, but HIV could still be present in your body. Follow-up testing may be recommended to confirm results or assess viral load.

Short name

HIV Antibody Screen

Frequently asked questions

How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will discuss the results with you in detail.
What does a positive result mean?
A positive result means your blood test detected HIV antibodies, which may indicate exposure to HIV. Further testing is usually done to confirm the diagnosis and determine your viral load and CD4 cell count for treatment planning.
Can I still be infected if my test is negative?
Yes, a negative result means no detectable antibodies at the time of testing, but HIV could still be present in your body. If you suspect exposure, discuss with your provider about additional testing, such as an HIV viral load test or antibody test at a later date.
  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