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Herpes Simplex Virus Type 1 Immunoglobulin G (IgG) Antibody, Serum

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

This test measures the presence of antibodies to the herpes simplex virus type 1 (HSV-1) in your blood. Antibodies are your body’s way of recognizing and fighting infections.

Quick summary

["This test helps determine if you’ve ever been exposed to HSV-1, which can cause cold sores or other infections."]

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

Key facts at a glance

LOINC
58784-0
Short code
HSV1 IgM CSF IA-aCnc
Synonyms
HSV1 IgM CSF IA-aCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms like cold sores, recurrent mouth ulcers, or if you’ve had close contact with someone known to have HSV-1. It can also be used for screening or research purposes.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into a vein in your arm to draw blood. It usually takes a few minutes, and you may feel a brief pinch.

What the Test Results Mean

Positive results indicate you have antibodies to HSV-1, suggesting past infection. Negative results mean you likely haven’t been infected with HSV-1 at the time of testing. Results don’t confirm active infection.

Common Reasons for Testing

This test is often used in research studies, for screening, or to assess exposure history in certain populations. It’s not typically used to diagnose active herpes outbreaks.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HSV-1 IgG Antibody

Frequently asked questions

How long does it take to get results from this test?
Results are usually available within 1 to 3 business days, depending on your lab’s processing time.
Can this test be used to diagnose a current herpes infection?
No, this test only measures antibodies from past exposure. Active herpes is diagnosed through symptoms, viral cultures, or other tests.
Is there any risk or discomfort with this blood test?
There’s a minor risk of bruising, slight pain, or swelling at the needle site. Most people experience only a brief discomfort during the draw.
  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