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Viral Hepatitis B DNA (Quantitative) – Plasma

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

This test measures the amount of Hepatitis B virus DNA in your blood to check for active infection.

Quick summary

["Knowing your Hepatitis B DNA levels helps doctors monitor infection and guide treatment decisions."]

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

Key facts at a glance

LOINC
49362-7
Short code
HBV DNA # Spec NAA+probe
Synonyms
HBV DNA # Spec NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 Is Done

Your doctor may order this test if you have symptoms of hepatitis B (like fatigue, jaundice, or abdominal pain), have been exposed to the virus, or are being treated for Hepatitis B. It’s also used to check if your current treatment is working or if the virus is spreading to other parts of your body.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. It usually takes a few minutes. If you’re pregnant, breastfeeding, or have a bleeding disorder, let your doctor know before the test.

What the Test Results Mean

High levels of Hepatitis B DNA often mean the virus is actively replicating and may require treatment. Very low or undetectable levels suggest the virus is less active. Your doctor will discuss results with you based on your overall health and treatment plan.

Possible Side Effects

Most people have no side effects from this test. Rarely, you might feel a brief sting or bruise at the injection site. If you experience excessive bleeding, swelling, or signs of infection (like fever or redness), contact your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Hepatitis B DNA testing is critical for diagnosing active infection, assessing disease progression, and guiding antiviral therapy. High viral loads may indicate resistance to treatment or disease spread, while low levels can signal remission or response to treatment. Regular monitoring helps prevent long-term liver damage.

Short name

Hep B DNA (Plasma)

Frequently asked questions

How long does it take to get my test results?
Results are typically available within 3–7 business days, depending on your lab. Your doctor will contact you with the final report once it’s ready.
Can I drink alcohol before this test?
No, avoid alcohol for 24 hours before your blood draw, as it may affect test accuracy.
Is this test covered by insurance?
Most insurance plans cover Hepatitis B DNA testing if medically necessary. Check with your provider to confirm coverage details.
  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