Basophil count (absolute)
This test measures the number of basophils, a type of white blood cell, in your blood. Basophils play a role in allergic reactions and inflammation.
["Basophils help your body respond to allergens and infections, but their levels can signal certain health conditions."]
Key facts at a glance
- LOINC
- 34911-8
- Short code
- Imm Basophils NFr Bld
- Synonyms
- Imm Basophils NFr Bld
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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 is a basophil?
Basophils are a type of white blood cell involved in allergic responses and chronic inflammation. They release histamine and other chemicals to help fight infections and regulate immune reactions. While they are less common than other white blood cells, they are essential for protecting your body against parasites and certain types of infections.
Why might your doctor order this test?
Your doctor may request a basophil count if you have symptoms like persistent itching, swelling, or allergic reactions, or if they suspect conditions such as chronic inflammation, certain cancers (like leukemia), or allergic disorders. It can also be part of a broader blood test to monitor immune function.
How is this test performed?
A small blood sample is drawn from a vein, usually in your arm. The blood is then analyzed in a lab to count the number of basophils present. The result is expressed as the number of basophils per microliter (µL) of blood.
What do the results mean?
Results are compared to a reference range specific to your age and health. Elevated basophil counts may indicate allergic conditions, chronic inflammation, or certain blood disorders, while very low counts might suggest immune suppression or other underlying issues.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical significance: Elevated basophil counts can signal chronic allergic conditions, parasitic infections, or certain hematologic malignancies. Low basophil counts may be associated with immune deficiencies or conditions affecting white blood cell production. Always discuss results with your healthcare provider for personalized interpretation.
Short name
Basophil blood count
Frequently asked questions
What causes basophil levels to change?
How often should I get this test?
Can lifestyle changes affect basophil counts?
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