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Neutrophil count (absolute)

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

This blood test measures the number of neutrophils, a type of white blood cell that helps fight infections and inflammation.

Quick summary

["Neutrophils help your body defend against harmful bacteria and infections."]

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

Key facts at a glance

LOINC
17836-8
Short code
Neutrophils NFr Snv
Synonyms
Neutrophils NFr Snv
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors may order a neutrophil count to diagnose or monitor conditions like infections, autoimmune diseases, or certain blood disorders. It can also help assess how well your immune system is responding to treatment.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or hand to draw a blood sample. If you’re nervous, let your healthcare provider know so they can help make it more comfortable.

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 high or very low counts may signal potential health issues that need further evaluation.

Common Conditions Affecting Neutrophils

High neutrophil counts (neutrophilia) can occur with infections, stress, or certain medications. Low neutrophil counts (neutropenia) may indicate immune suppression, blood disorders, or side effects from treatment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance of neutrophil counts includes diagnosing infections, assessing immune function, and guiding treatment for conditions like leukemia, autoimmune diseases, or chemotherapy side effects.

Short name

Neutrophil count

Frequently asked questions

What causes a high neutrophil count?
High neutrophil counts are often due to infections (like bacterial infections), stress, or inflammation. Rarely, it may be linked to certain medications or underlying conditions like Cushing’s syndrome.
What causes a low neutrophil count?
Low neutrophil counts can result from infections, autoimmune diseases, chemotherapy, or conditions that weaken the bone marrow (like aplastic anemia). It may also occur with certain medications.
How often should I get this test?
Your doctor will determine how often you need this test based on your health condition, treatment plan, or symptoms. Follow their guidance for scheduling.
  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