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Neutrophil count (absolute) in serum/plasma

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

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

Quick summary

["Neutrophils are key defenders against bacterial infections; 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
109800-3
Short code
N men sg A Ag Msmt CSF
Synonyms
N men sg A Ag Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may order this test to check for infections, monitor immune function, or evaluate conditions like leukemia, autoimmune diseases, or chronic inflammation. It’s also used before surgeries or treatments that could affect your immune system.

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 blood. If you’re on blood thinners, let your doctor know to avoid excessive bruising.

What the Results Mean

Results are typically reported as a count of neutrophils per microliter (µL) of blood. While reference ranges vary by lab, very low counts may indicate immune suppression, and very high counts could signal infection or other conditions.

Common Conditions Affecting Neutrophils

Low neutrophil counts (neutropenia) can occur with certain medications, chemotherapy, or genetic disorders. High neutrophil counts (neutrophilia) may appear with infections, stress, or inflammatory diseases.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Absolute Neutrophil Count (ANC)

Frequently asked questions

What does my neutrophil count tell me about my health?
A neutrophil count outside typical ranges can signal potential health risks. For example, very low counts may mean your body struggles to fight infections, while very high counts could point to an active infection or other underlying issues. Always discuss results with your healthcare provider.
How often should I get this test?
Your doctor will determine how often you need this test based on your medical history, symptoms, and treatment plan. Regular monitoring may be needed if you have chronic conditions or are undergoing treatments that affect your immune system.
Can I eat or drink before this test?
You can eat and drink normally before this test unless your doctor advises otherwise. Blood tests don’t require fasting unless specified for other tests.
  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