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Hepatitis B Virus Genotype Determination (Serum)

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

This test identifies which specific genotype of the Hepatitis B virus you may have, helping healthcare providers tailor treatment and monitor infection progression.

Quick summary

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

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

Key facts at a glance

LOINC
72848-5
Short code
HBV 184 Islt Genotyp
Synonyms
HBV 184 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) exists in multiple genotypes (A through G), each with slightly different behaviors in the body. This test helps doctors determine which genotype you have, as some genotypes may respond differently to treatments or cause more severe disease over time.

How the Test Works

No special preparation is needed for this test. You may eat or drink normally before your blood draw. The process typically takes about 15 minutes, and results are usually available within 3–7 business days depending on lab processing.

What to Expect Before and After

You may experience mild discomfort or bruising at the needle site after the blood draw. Apply gentle pressure to the area for a few minutes to help reduce swelling. Avoid vigorous activity for the remainder of the day to prevent excessive bleeding.

Common Results and Next Steps

If your test shows a known genotype, your healthcare provider will use this information to choose the most effective antiviral medication for you. Some genotypes may require different treatment durations or monitoring schedules. If results are inconclusive or unexpected, repeat testing may be recommended.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hepatitis B Genotype Test

Frequently asked questions

What does a positive result mean?
A positive result means your blood sample contains genetic material from the Hepatitis B virus, and the test has identified which specific genotype you carry. This does not indicate whether you are currently infectious or if the virus is active, but it helps guide treatment decisions.
Can I get this test if I’m not currently sick?
Yes, this test is often recommended for people who have been exposed to Hepatitis B, those with chronic liver disease, or individuals at higher risk (e.g., healthcare workers, travelers to endemic regions). It’s also used as part of routine monitoring for chronic HBV carriers.
How long does it take to get results?
Results are typically available within 3–7 business days, depending on the lab’s workflow. Your healthcare provider will contact you once results are ready, either through a phone call or secure message in your patient portal.
  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