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Neutrophil count (absolute)

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 by attacking bacteria and other harmful substances.

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
67826-8
Short code
Neutrophils # Pcar
Synonyms
Neutrophils # Pcar
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 this test to diagnose or monitor conditions affecting your immune system, such as infections, inflammatory diseases, or blood disorders. It can also help assess how well your body is responding to treatment for certain illnesses.

What to Expect Before the Test

No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample, which usually takes a few minutes. If you’re anxious, let your healthcare provider know so they can help make it more comfortable.

What the Test Results Mean

Results are typically reported as a count of neutrophils per microliter (µL) of blood. While reference ranges vary by lab, very low levels (below normal) may indicate infections, autoimmune diseases, or bone marrow disorders. Very high levels could suggest infections, inflammation, or other conditions.

Common Conditions Affecting Neutrophil Levels

Low neutrophil counts (neutropenia) may be linked to infections, certain medications, or blood cancers. High neutrophil counts (neutrophilia) can result from infections, stress, or inflammatory processes. Your doctor will interpret results in the context of your overall health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Absolute Neutrophil Count (ANC)

Frequently asked questions

How often will I need this test?
The frequency depends on your health condition. If you have a chronic illness or are under treatment, your doctor may schedule follow-up tests periodically to monitor changes in your neutrophil count.
Can I eat or drink before this test?
You can eat and drink normally before this test unless your doctor specifies otherwise. Blood tests like this are generally done on an empty stomach only if testing other blood components (like glucose), but not for neutrophil counts.
What are the risks or side effects of this test?
The most common side effect is a slight bruise, redness, or soreness at the injection site. Rarely, a small amount of bleeding or swelling may occur. Most side effects are mild and resolve quickly.
  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