Skip to content

Hepatitis B Virus Genotype Determination (Serum/Plasma)

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

This test identifies which specific genotype of the Hepatitis B virus you may have, which can help guide treatment and monitoring.

Quick summary

["Your genotype helps doctors choose the best treatment plan for your hepatitis B infection."]

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

Key facts at a glance

LOINC
49877-4
Short code
HBV 173 Islt Genotyp
Synonyms
HBV 173 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 Is Done

Doctors may order this test if you have chronic hepatitis B, have been treated for it, or if your liver health is being monitored. Knowing your genotype helps tailor treatment to your body’s response and reduces the risk of complications like liver damage or cirrhosis.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The sample is sent to a lab for testing.

What the Test Results Mean

Results show which of the seven known hepatitis B virus genotypes you have (e.g., genotype A, B, C, etc.). This information helps determine the most effective antiviral therapy and how often you may need follow-up tests.

Common Causes of Hepatitis B Genotype Testing

This test is most commonly done for people with chronic hepatitis B, those who have been exposed to the virus, or those who are considering treatment options. It’s also used to monitor treatment progress and adjust care plans.

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 you have a specific genotype of the hepatitis B virus in your blood. This doesn’t indicate how severe your infection is, but it helps guide treatment decisions.
How long does it take to get results?
Results are typically available within 3 to 7 business days, depending on your lab’s processing time.
Can I stop taking my hepatitis B medication if my genotype changes?
No, you should not stop treatment without consulting your doctor. Your genotype helps determine the best medication and dosage, but other factors like your overall health and virus activity also play a role.
  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