Granulocyte count (absolute)
This test measures the number of granulocytes (a type of white blood cell) in your blood. Granulocytes help fight infections and are part of your immune system.
["Granulocytes help protect your body from infections; this test checks their levels."]
Key facts at a glance
- LOINC
- 70040-1
- Short code
- Granulocytes NFr Snv Auto
- Synonyms
- Granulocytes NFr Snv Auto
- Category
- chemistry
- Sample
- fluid
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- automated-count
- Specimen volume
- 2-5 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h
- Hemolysis max
- 300
- TAT
- 4–24 hours
- Order
- routine
Why is this test done?
Your doctor may order this test to evaluate your immune system, detect infections, or monitor conditions like leukemia, autoimmune diseases, or certain infections. It can also help assess how well treatments are working.
What does a result mean?
Results are interpreted based on your overall health and symptoms. Low granulocyte counts may suggest immune deficiencies or infections, while very high counts could indicate inflammation, infections, or certain blood disorders. Your healthcare provider will discuss these findings with you.
How is this test performed?
A small blood sample is taken from a vein, usually in your arm. The blood is then analyzed in a lab to count the granulocytes. This process is quick and typically painless.
What should I expect before or after the test?
There are usually no special preparations needed. You may experience mild discomfort or bruising at the injection site, but this usually goes away quickly. If you’re on blood-thinning medication, let your doctor know before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical significance: Granulocyte counts are crucial for diagnosing and managing conditions affecting immune function. Low counts may indicate severe infections, bone marrow disorders, or immune deficiencies, while elevated counts can signal chronic infections, inflammation, or certain cancers. Regular monitoring helps track treatment responses in patients with chronic illnesses.
Short name
Granulocyte count
Frequently asked questions
How often should I get this test?
What are the typical reference ranges?
Can I eat or drink before this test?
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