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HIV-1 Antibody Screening Test (Plasma/Serum)

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

This test checks for antibodies to the human immunodeficiency virus (HIV), which your body makes in response to the virus. Antibodies can appear in your blood after infection, often within weeks to months.

Quick summary

["Detects early signs of HIV infection with a simple blood test."]

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

Key facts at a glance

LOINC
109857-3
Short code
HIV1 RNA Msmt Plas
Synonyms
HIV1 RNA Msmt Plas
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 looks for HIV-1 antibodies in your plasma or serum. These antibodies are proteins your immune system produces when it encounters the HIV virus. The presence of these antibodies suggests past or current infection, though they may take time to develop after exposure.

How the Test Works

Your blood sample is analyzed using an immunoassay method to detect HIV-1 antibodies. This process identifies specific proteins (antibodies) that match HIV’s structure, helping determine if infection has occurred.

Why It’s Important

Early detection is critical for managing HIV effectively. This screening helps identify infection before symptoms appear, allowing for timely medical intervention and support.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted to draw blood from your arm. The process takes a few minutes, and you can return to normal activities afterward.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HIV Antibody Screen

Frequently asked questions

How soon can I get my results?
Results are typically available within 1–3 business days. Your healthcare provider will discuss the results with you in detail.
What does a positive result mean?
A positive result means your test detected HIV antibodies, indicating possible infection. You’ll need further testing to confirm the diagnosis and begin appropriate care.
Can I still be infected if my test is negative?
Yes, it’s possible if infection developed shortly after exposure. HIV antibodies may take weeks to months to appear. Consider getting retested if you suspect recent exposure.
  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