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Hepatitis B Virus (HBV) Genomic Sequence by Serum Probe

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

This test identifies the specific genetic sequence of the hepatitis B virus in your blood. It helps determine which HBV genotype you have, which can influence treatment choices and disease progression.

Quick summary

["Understanding your HBV genotype helps guide personalized treatment plans and monitor your response to therapy."]

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

Key facts at a glance

LOINC
33629-7
Short code
HBV sequencing Ser NAA+probe
Synonyms
HBV sequencing Ser 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

Doctors may order this test if you have chronic hepatitis B, are considering treatment, or if you’re at high risk for HBV infection. It’s also used to confirm the presence of HBV in your bloodstream and to assess the effectiveness of antiviral medications.

How the Test Works

A small blood sample is taken from your arm. The lab then analyzes the genetic material (DNA) of the hepatitis B virus in your serum using a specialized probe-based sequencing method. This helps identify which HBV genotype is present.

Sample Collection and Preparation

You’ll have a needle inserted into your vein to draw blood. The sample is sent to a lab where it’s processed to isolate the viral DNA for testing. No special preparation is needed, but avoid eating or drinking anything for a few hours before the test if instructed.

What to Expect After the Test

After the blood draw, you may feel a brief pinch or discomfort. Most people recover quickly, but if you experience bruising or excessive bleeding, contact your healthcare provider. Results are typically available within 1–2 weeks, depending on lab processes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HBV Genotyping (Serum)

Frequently asked questions

How long does it take to get the results of this test?
Results are usually available within 1 to 2 weeks, but this can vary depending on your lab’s processing times. Your healthcare provider will contact you once the results are ready.
Is there any preparation needed before this test?
No special preparation is required, but you may be asked to fast for a few hours before the blood draw if instructed by your doctor. Follow any specific instructions they provide to ensure accurate results.
Can this test detect acute or chronic hepatitis B?
This test specifically detects the genetic sequence of the hepatitis B virus in your blood, which is useful for identifying chronic infection and guiding treatment. It does not directly diagnose acute infection but may be used alongside other tests (like antibody tests) for comprehensive evaluation.
  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