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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 that helps fight infections and inflammation.

Quick summary

["Neutrophils protect your body from harmful bacteria and infections."]

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

Key facts at a glance

LOINC
98637-2
Short code
Sensory NC Pnl L MACN
Synonyms
Sensory NC Pnl L MACN
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

What Neutrophil Count Measures

Neutrophils are a key part of your immune system. They detect and destroy bacteria and other pathogens. This test helps doctors assess your risk of infections, especially if your immune system is weakened or if you have certain conditions like cancer or autoimmune diseases.

Why It Might Be Ordered

Your doctor may order a neutrophil count to monitor your health before surgery, to check for infections, or to evaluate conditions that affect your immune system, such as leukemia, HIV, or other immune disorders.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into a vein in your arm to draw a blood sample. This is a quick and painless procedure.

What the Results Mean

Results can vary based on your overall health and medical history. High neutrophil counts may indicate an infection or inflammation, while very low counts could suggest immune system issues or certain medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Neutrophil count

Frequently asked questions

How often will I need this test?
Your doctor will determine how often you need this test based on your medical condition and treatment plan. Some patients may need it weekly, monthly, or less frequently depending on their needs.
Can I eat or drink before the test?
You can eat and drink normally before this test unless your doctor instructs otherwise. Blood tests do not require fasting.
What are the possible side effects of the blood draw?
The most common side effect is a slight bruise, redness, or soreness at the needle insertion site. Rarely, there may be a small risk of infection or excessive bleeding.
  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