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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 that helps fight infections and inflammation.

Quick summary

["Granulocytes help protect your body from harmful bacteria and viruses."]

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

Key facts at a glance

LOINC
107528-2
Short code
Granulocytes Vag Ql Gram Stn
Synonyms
Granulocytes Vag Ql Gram Stn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
gram-stain
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

Doctors may order a granulocyte count to check for infections, blood disorders, or immune system issues. It can also help monitor conditions like leukemia, autoimmune diseases, or after treatments that affect white blood cells.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or hand to draw a blood sample. It usually takes a few minutes, and you may feel a brief pinch.

What the Test Results Mean

Results show the absolute number of granulocytes in your blood. Low levels may indicate infections, immune problems, or certain cancers. High levels could suggest inflammation, infections, or other conditions.

Common Conditions Monitored

This test helps diagnose or track conditions like severe infections, blood cancers (e.g., leukemia), or immune deficiencies. It’s also used during chemotherapy or other treatments that suppress the immune system.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Granulocyte counts are critical for assessing immune function and detecting abnormalities early. Low counts can increase infection risk, while elevated counts may signal underlying inflammation or infection.

Short name

Granulocyte Count

Frequently asked questions

What causes granulocyte counts to be low?
Low granulocyte counts can result from infections, certain medications (like chemotherapy), autoimmune diseases, or blood disorders. Your doctor may also check if you have a genetic condition affecting white blood cells.
What causes granulocyte counts to be high?
High granulocyte counts often appear during infections, inflammation, or stress. Some medical conditions, like certain cancers or autoimmune disorders, may also raise them. Your doctor will review your symptoms and other test results to determine the cause.
How often should I get this test?
Your doctor will decide how often to check your granulocyte count based on your health needs. It might be done regularly if you have a chronic condition, are undergoing treatment, or are at higher risk for 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