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Neutrophil Segment Count in Whole Blood by Automated Hematology

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 protect your body from bacteria and infections; abnormal levels may signal health concerns."]

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

Key facts at a glance

LOINC
32200-8
Short code
Neuts Seg NFr Bld Auto
Synonyms
Neuts Seg NFr Bld Auto
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
automated-count
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Neutrophil Count Measures

Neutrophils are a key part of your immune system. This test checks how many are present in your blood, which can help identify infections, inflammation, or other conditions affecting your immune response.

Why It Matters in Your Health

High neutrophil counts may indicate acute infections, stress, or certain inflammatory diseases. Low counts could suggest immune deficiencies, chronic infections, or conditions like leukemia.

Common Reasons for Testing

Your doctor may order this test if you have symptoms like frequent infections, unexplained fevers, or signs of inflammation. It’s also used during cancer treatments, autoimmune diseases, or before surgeries.

How the Test Works

A small blood sample is taken, usually from your arm. The lab uses an automated machine to count and analyze your white blood cells, including neutrophils, based on their size, shape, and electrical properties.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Neutrophil Count

Frequently asked questions

How can I prepare for this test?
No special preparation is needed. You can eat, drink, and take your usual medications as usual. Avoid heavy exercise or stress before the test if your doctor advises it.
Will there be any discomfort?
You may feel a slight pinch when the blood is drawn, but it usually doesn’t cause long-lasting discomfort. Most people feel fine afterward.
What if my results are outside the normal range?
Your doctor will discuss your results with you. If your neutrophil count is high, you may need further tests to find the cause, like infections or medications. If it’s low, your doctor may recommend treatments to support your immune system or investigate underlying conditions.
  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