Hepatitis B Virus Genotype Determination (Serum/Plasma)
This test identifies which genetic subtype of the Hepatitis B virus is present in your blood. It helps doctors determine the best treatment approach and monitor your infection progression.
["Understanding your Hepatitis B genotype can guide personalized care and treatment plans."]
Key facts at a glance
- LOINC
- 72845-1
- Short code
- HBV 202 Islt Genotyp
- Synonyms
- HBV 202 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
Your healthcare provider may recommend this test if you have chronic Hepatitis B, are considering treatment options, or if you need to assess how your virus might respond to specific medications. Genotype testing can also be important for pregnant women with Hepatitis B to prevent transmission to their baby.
How the Test Works
The test uses a blood sample (either serum or plasma) to detect the genetic material (DNA) of the Hepatitis B virus. Advanced laboratory techniques, such as molecular methods, analyze the virus’s genetic sequence to determine its subtype (genotype). This process helps classify the virus into one of several known groups (e.g., A, B, C, D, etc.).
Sample Collection and Preparation
A small blood sample is drawn from your arm, typically in a clinic or lab setting. The blood is processed to separate the serum or plasma, which contains the virus DNA. This sample is then sent to a specialized lab for testing.
What to Expect Before the Test
There are usually no special preparations needed for this test. You may be asked to fast or avoid certain medications, but this is rare for genotype testing. If you are pregnant or have a history of bleeding disorders, let your healthcare provider know before the blood draw.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Knowing your Hepatitis B genotype is crucial because different subtypes may respond differently to treatments like antivirals. For example, some genotypes are more likely to cause liver damage or lead to chronic infection. Your genotype can also influence decisions about long-term management, such as monitoring frequency or choosing specific therapies. This information helps your doctor tailor your care to your unique situation.
Short name
Hepatitis B Genotype Test
Frequently asked questions
What Does a Positive Result Mean?
How Long Does It Take to Get Results?
Can I Skip This Test If I Already Have Hepatitis B?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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