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Human Immunodeficiency Virus (HIV) Antibody Screening, Serum/Plasma

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

This test checks for antibodies to the human immunodeficiency virus (HIV), which your body produces in response to infection. Antibodies are proteins that help your immune system fight the virus.

Quick summary

["HIV antibody screening helps detect early infection and guides next steps in care."]

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

Key facts at a glance

LOINC
33591-9
Short code
Hu IgG Ser FC-aCnc
Synonyms
Hu IgG Ser FC-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
86430
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 detects HIV antibodies in your blood or plasma. These antibodies develop after exposure to the virus but may take weeks to months to appear. This screening is typically done as part of routine testing or when you have risk factors for HIV.

Why Is This Test Important?

Early detection of HIV allows for prompt treatment, which can help manage the virus and improve your health. It also helps prevent the spread of HIV to others.

How Is This Test Performed?

A small blood sample is taken from your arm using a needle. The blood is then processed to separate the serum or plasma, which is tested for HIV antibodies using an immunoassay method.

What Are Common Results?

Results are usually reported as positive or negative. A positive result means antibodies to HIV were found, indicating possible infection. A negative result means no antibodies were detected at the time of testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: HIV antibody screening is critical for public health. Early identification enables timely medical intervention, reduces disease progression, and supports prevention efforts. It is part of comprehensive care for individuals at higher risk or those with symptoms suggestive of infection.

Short name

HIV Antibody Screen

Frequently asked questions

What Does a Positive Result Mean?
A positive result means your test detected HIV antibodies, suggesting you may have been infected. You should follow up with your healthcare provider for further testing, such as a confirmatory HIV viral load test, and begin appropriate medical care.
How Soon After Exposure Can I Get Tested?
HIV antibodies may take weeks to months to develop after exposure. Early testing (within 4–6 weeks) may not detect antibodies yet. If you suspect exposure, discuss testing with your healthcare provider, who may recommend repeat testing at recommended intervals.
Can I Get Tested at Home?
HIV antibody screening is typically performed in a clinical or laboratory setting by a healthcare professional. Home testing kits are available for antibody detection but should be used as directed and interpreted by a healthcare provider.
  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