Apolipoprotein E (ApoE) Allele 4 Detection (Qualitative)
This test identifies whether you carry the ApoE4 genetic variant, which may influence your risk for certain health conditions like Alzheimer’s disease or heart disease.
["Knowing your ApoE genotype can help your healthcare provider assess your risk and recommend personalized preventive care."]
Key facts at a glance
- LOINC
- 34735-1
- Short code
- Deprecated APOE allele4 Bld/T
- Synonyms
- Deprecated APOE allele4 Bld/T
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- molgen
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test detects the presence of the ApoE4 allele, a specific variant of the ApoE gene. ApoE is a protein involved in lipid metabolism and brain function. The ApoE4 variant is more common in some populations and may increase susceptibility to certain diseases.
Why It Matters for You
While ApoE4 doesn’t cause disease on its own, it can interact with other factors like diet, lifestyle, and genetics to raise the risk of conditions like late-onset Alzheimer’s disease or cardiovascular disease. Your doctor may use this information to guide monitoring or preventive strategies.
How the Test Works
This is a genetic test, meaning it examines your DNA. A small blood sample is taken to analyze your ApoE alleles. The test is qualitative, meaning it only reports whether you have the ApoE4 variant (yes/no) rather than measuring its exact quantity.
What to Expect Before the Test
No special preparation is needed for this test. You’ll have a simple blood draw, similar to other routine blood tests. Results are typically available within a few days to a week.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
ApoE4 is associated with higher risks for neurodegenerative diseases (e.g., Alzheimer’s) and cardiovascular conditions (e.g., atherosclerosis). However, risk is not absolute—lifestyle choices, diet, and other genetic factors play a role. This test helps identify individuals who may benefit from closer monitoring or targeted interventions.
Short name
ApoE Genotype Check
Frequently asked questions
Will this test affect my insurance or coverage?
How long will I need to wait for results?
Can I get this test if I’m pregnant?
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