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Neutrophil count (absolute) in whole blood

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.

Quick summary

["Neutrophils are key defenders against bacterial infections; low counts may signal immune issues or infections."]

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

Key facts at a glance

LOINC
97637-3
Short code
S pneum DNA Snv Ql NAA+n-prb
Synonyms
S pneum DNA Snv Ql NAA+n-prb
Category
coagulation
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
non-probe-amp-tar
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

What Is a Neutrophil?

Neutrophils are a type of white blood cell that play a critical role in your body’s immune response. They’re the most common type of white blood cell and are essential for fighting off bacterial infections. When your body detects bacteria, neutrophils rush to the site of infection to destroy them.

Why Might You Need This Test?

Your doctor may order an absolute neutrophil count (ANC) to check if your immune system is working properly. This can be important if you have conditions like leukemia, certain autoimmune diseases, or if you’re undergoing treatments that weaken your immune system, such as chemotherapy.

When Might You Get This Test?

You might receive this test if you have symptoms like frequent infections, slow wound healing, or if your doctor suspects an underlying condition affecting your white blood cells. It’s also often part of routine blood work for people with chronic illnesses.

What to Expect Before the Test

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

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Absolute Neutrophil Count (ANC)

Frequently asked questions

What does an abnormal ANC mean?
A low ANC (below normal levels) can indicate conditions like bone marrow disorders, infections, or treatments that suppress your immune system. A very high ANC may suggest inflammation or other immune responses, but further evaluation is needed to determine the exact cause.
How often should I get this test?
Your doctor will determine how often you need this test based on your health condition, treatment plan, and symptoms. Regular monitoring may be necessary if you have chronic illnesses or are undergoing treatments that affect your immune system.
Can I eat or drink before this test?
Yes, you can eat and drink normally before this test. No special diet or fasting is required.
  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