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Neutrophil count (absolute, peripheral 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—levels can signal health risks or infection."]

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

Key facts at a glance

LOINC
98627-3
Short code
Sensory NC Pnl L ulnar n
Synonyms
Sensory NC Pnl L ulnar n
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 Is This Test Done?

Doctors may order this test to check for infections (like bacterial), inflammation, or blood disorders. It can also help monitor conditions like leukemia or autoimmune diseases.

What to Expect Before the Test

No special preparation is needed. A simple blood draw from your arm is all that’s required. The test is quick and usually painless.

What the Results Mean

High neutrophil counts may indicate infection, inflammation, or certain cancers. Low counts could suggest immune issues or blood disorders. Your doctor will interpret results in context with your symptoms and medical history.

Common Conditions Monitored

This test helps diagnose or track conditions like chronic infections, autoimmune diseases, or blood cancers. It’s also used in routine check-ups for people with weakened immune systems.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Neutrophil count

Frequently asked questions

What causes my neutrophil count to change?
Neutrophil levels can rise due to infections, stress, or certain medications. They may drop from immune disorders, chemotherapy, or severe illness. Symptoms like fever, fatigue, or swelling often accompany these changes.
How often should I get this test?
Frequency depends on your health. Your doctor may recommend it during routine check-ups, before treatments, or if you have symptoms like frequent infections or unexplained fatigue.
Can diet or lifestyle affect neutrophil counts?
While diet and stress can influence immune function, they don’t directly alter neutrophil counts. Maintaining good health and following medical advice is key to supporting your immune system.
  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