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Granulocyte Count (Absolute)

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

This test measures the number of granulocytes, a type of white blood cell, in your blood. Granulocytes help fight infections and inflammation.

Quick summary

["Granulocytes are key defenders against bacteria and fungi; low or high levels may signal health concerns."]

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

Key facts at a glance

LOINC
26522-3
Short code
Granulocytes NFr Snv
Synonyms
Granulocytes NFr Snv
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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?

Doctors may order an absolute granulocyte count to diagnose or monitor conditions like infections, autoimmune diseases, or blood disorders. It’s also useful before chemotherapy or other treatments that can lower white blood cell counts.

What to Expect Before the Test

No special preparation is needed. You’ll have a simple blood draw from a vein, usually in your arm. The process takes a few minutes, and you may feel a slight pinch.

What the Results Mean

Results are reported as the number of granulocytes per microliter (µL) of blood. Very low counts may indicate infections, bone marrow problems, or immune disorders. Very high counts could suggest inflammation, infections, or certain cancers.

Common Conditions Affecting Results

Granulocyte counts can be affected by infections (like pneumonia or urinary tract infections), chronic illnesses (such as rheumatoid arthritis), or medications (like steroids). Stress, illness, or recent blood loss can also temporarily alter levels.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Absolute Neutrophil Count (ANC)

Frequently asked questions

What causes low granulocyte counts?
Low granulocyte counts (often called neutropenia) can result from infections, autoimmune diseases, chemotherapy, or conditions that impair bone marrow function. Symptoms may include frequent infections, fatigue, or fever.
What causes high granulocyte counts?
High granulocyte counts (neutrophilia) may signal infections, inflammation, stress, or certain cancers. Symptoms like fever, swelling, or unexplained weight loss could accompany elevated levels.
How often should I get this test?
Your doctor will determine how often to check your granulocyte count based on your health needs. Regular monitoring may be needed if you have ongoing conditions like cancer, autoimmune diseases, or frequent infections.
  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