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Granulocyte Count (Absolute)

Published: August 9, 2026Updated: August 17, 2026

This test measures the number of granulocytes (white blood cells known as neutrophils) in your blood. Neutrophils are a key part of your immune system, helping fight infections.

Quick summary

["Your doctor may use this test to check for infections, inflammation, or immune system issues."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
30460-0
Short code
Granulocytes NFr Gast
Synonyms
Granulocytes NFr Gast
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84484
SNOMED
302774002
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 order an absolute neutrophil count to monitor your immune response, especially if you have conditions like cancer, chemotherapy, or certain infections. It helps track how well your body is producing these white blood cells to prevent severe infections.

What to Expect Before the Test

You won’t need special preparation. The test is usually done by drawing blood from a vein in your arm. It takes a few minutes, and you may feel a slight pinch, but it’s quick and safe.

How the Test Results Are Interpreted

Results are compared to your baseline or lab standards, but exact numbers aren’t provided here. Low counts may signal immune suppression, while very high counts could indicate infection or other conditions. Your doctor will discuss findings with you.

Common Conditions Monitored

This test is critical for patients undergoing treatments like chemotherapy, those with autoimmune diseases, or those with chronic infections. It helps prevent dangerous drops in neutrophil levels that could lead to severe infections.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Absolute Neutrophil Count (ANC)

Frequently asked questions

What causes a low granulocyte count?
Low granulocyte counts can result from chemotherapy, autoimmune diseases, certain infections, or genetic disorders. It may also happen if your body isn’t producing enough white blood cells.
How often should I get this test?
Your doctor will determine the frequency based on your treatment plan, health status, and medical history. Regular monitoring may be needed if you’re undergoing treatments that affect your immune system.
Can I eat or drink before this test?
No special preparation is needed. You can eat, drink water, and continue your normal activities before the blood draw.
  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 17, 2026. · Read our editorial policy