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Hepatitis B Virus Genotype Identification (Serum/Plasma)

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

This test identifies which specific genotype of the Hepatitis B virus is present in your blood. Knowing your genotype helps healthcare providers tailor treatment and monitor your infection more effectively.

Quick summary

["Understanding your Hepatitis B genotype can guide treatment decisions and long-term care."]

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

Key facts at a glance

LOINC
72841-0
Short code
HBV 237 Islt Genotyp
Synonyms
HBV 237 Islt Genotyp
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
genotyping
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 Matters

Hepatitis B virus (HBV) has multiple genotypes, each with slightly different behaviors and responses to treatment. This test helps doctors determine which genotype you have, which can influence the choice of antiviral medication and how closely you’ll need to be monitored.

How the Test Works

Your blood sample is analyzed using an immunoassay method to detect specific genetic sequences unique to each HBV genotype. The test looks for markers that confirm the presence of one of the known genotypes (e.g., A, B, C, D, E, F, G, or others).

Sample Collection

This test requires a blood sample drawn from a vein in your arm. The sample is collected in a special tube and sent to the lab for analysis.

Preparation and Results

No special preparation is needed before this test. Results are typically available within a few days and will indicate which HBV genotype is present in your blood.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Knowing your HBV genotype helps healthcare providers choose the most effective antiviral treatment, predict how your infection may progress, and plan for long-term management. Different genotypes may respond differently to medications, and some may require more frequent monitoring.

Short name

Hepatitis B Genotype Test

Frequently asked questions

What does a positive result mean?
A positive result means your blood contains the specific genetic material of a Hepatitis B virus genotype. This does not indicate the severity of your infection or how long you’ve had it, but it helps guide treatment options.
How long does it take to get results?
Results are usually available within 3 to 7 business days, depending on lab processing times. Your healthcare provider will contact you once the results are ready.
Can this test be done on urine or saliva?
No, this test specifically requires a blood sample to identify the Hepatitis B virus genotype. Urine or saliva samples are not used for this type of test.
  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