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Neutrophil Immature Cells in Blood (Fluid)

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

This test measures the presence of immature white blood cells called neutrophils in your blood. These cells are part of your immune system and help fight infections.

Quick summary

["Immature neutrophils can signal potential immune system activity or certain health conditions."]

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

Key facts at a glance

LOINC
59816-9
Short code
Neutrophils.immature NFr Fld
Synonyms
Neutrophils.immature NFr Fld
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
86430
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 Might This Test Be Done?

Your healthcare provider may order this test to check for infections, inflammation, or other conditions affecting your bone marrow or blood production. It can also help monitor treatments for blood disorders or cancers.

What Does the Test Involve?

A small sample of your blood is drawn, typically from a vein in your arm. The sample is then analyzed in a lab to count and identify different types of immature neutrophils present in the fluid portion of your blood.

What Are Immature Neutrophils?

Neutrophils are a type of white blood cell that play a key role in defending your body against infections. Immature neutrophils are in the process of developing and may appear in higher numbers when your bone marrow is producing more cells than usual, often due to infection, stress, or certain medical conditions.

What Could Abnormal Results Mean?

Elevated levels of immature neutrophils might indicate an active infection, inflammation, or conditions like leukemia, severe stress (such as trauma or surgery), or certain medications that affect blood cell production.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Changes in immature neutrophil counts can help healthcare providers diagnose or monitor conditions affecting blood cell development and function, guiding treatment decisions.

Short name

Immature Neutrophils (Blood Fluid)

Frequently asked questions

How often will I need this test?
The frequency depends on your medical condition and treatment plan. Your healthcare provider will let you know if follow-up tests are needed.
What are the typical reference ranges for this test?
Reference ranges can vary by lab and may not be widely publicized. Your results will be compared to your own baseline or specific clinical criteria set by your provider.
Can I eat or drink anything before this test?
No special preparation is usually needed for this test. However, always follow your healthcare provider’s instructions, as they may vary based on your specific situation.
  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