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Hepatitis B Core Antibody, Serology (Qualitative)

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

This test detects antibodies to the hepatitis B core antigen, which can help identify past or current hepatitis B infection.

Quick summary

["This test helps determine if you’ve been exposed to hepatitis B virus (HBV)."]

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

Key facts at a glance

LOINC
5188-8
Short code
HBV core Ab Ser RIA-aCnc
Synonyms
HBV core Ab Ser RIA-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
ria
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 antibodies (specifically anti-HBc) produced by your immune system in response to hepatitis B virus infection. These antibodies may appear shortly after exposure and can persist long-term, even after the virus itself has cleared from your body.

Why It’s Done

Doctors may order this test if you have risk factors for hepatitis B (e.g., travel to regions with high HBV prevalence, unprotected sex, or exposure to infected blood), symptoms like fatigue or jaundice, or if you’re being screened for chronic liver conditions.

Sample Collection and Process

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where it’s tested for the presence of anti-HBc antibodies using an immunoassay method.

Interpretation and Results

A positive result means your immune system has detected past or current HBV exposure. A negative result suggests no current infection or exposure, but further testing may be needed for confirmation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hepatitis B Core Antibody (Anti-HBc)

Frequently asked questions

Hepatitis B core antibodies can indicate past infection (where the virus has likely cleared) or chronic infection (where the virus remains active). This test alone doesn’t distinguish between these states, so additional tests (like hepatitis B surface antibody or viral load) may be needed for full assessment.
A positive anti-HBc result may prompt further evaluation for liver health, vaccination status, or counseling about HBV risks. It doesn’t directly show liver damage but can guide next steps for monitoring or treatment.
What does a positive anti-HBc result mean?
A positive result means your body has produced antibodies against the hepatitis B core antigen, suggesting past or current infection. This doesn’t always mean you’re currently infectious, but it warrants further evaluation by your healthcare provider.
Can I get vaccinated after a positive anti-HBc test?
Yes, if you’re not already vaccinated, the hepatitis B vaccine can still protect you. Your provider may recommend it, especially if you’re at higher risk for reinfection or liver complications.
  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