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White Blood Cell Count with Differential (Automated, Strip-Based)

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

This test measures the types and proportions of white blood cells in your blood, helping identify infections, immune responses, or other conditions affecting your blood cells.

Quick summary

["Your doctor may use this test to check for infections, inflammation, or blood disorders."]

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

Key facts at a glance

LOINC
58805-3
Short code
WBC # Ur Strip.auto
Synonyms
WBC # Ur Strip.auto
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
4.5
Ref high
11
Critical range
2 N/A – 30 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
test-strip-automated
CPT
85004
SNOMED
900000000000003002
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Does This Test Measure?

White blood cells (WBCs) are part of your immune system. This test counts and categorizes five main types of WBCs: neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Each type plays a role in fighting infections or responding to inflammation.

Why Might You Need This Test?

Your doctor might order this test if you have symptoms like frequent infections, unexplained fevers, swollen lymph nodes, or signs of an immune or blood disorder. It can also help monitor conditions like leukemia, autoimmune diseases, or infections.

How Is the Test Done?

A small blood sample is taken from a vein in your arm. The blood is processed on a special machine that automatically counts and identifies the different types of white blood cells using a strip-based technology.

What Are the Results Used For?

The results help determine if your immune system is functioning normally or if there’s an imbalance that could indicate an underlying health issue. Your doctor will compare the results to your symptoms and medical history to make a diagnosis.

Reference range

Adult: 4.5-11.0 x 10^9/LN/A

Specimen: urine

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

WBC Diff (Auto)

Frequently asked questions

How long will it take to get my results?
Results are typically available within 24 to 48 hours, depending on your lab’s processing schedule. Your doctor will contact you once they have the results.
Can I eat or drink before this test?
No special preparation is needed for this test. You can eat and drink normally before your blood draw.
What are the possible side effects of having blood drawn?
Most people experience only mild discomfort or bruising at the site of the needle. Rarely, there may be slight swelling or pain. If you experience excessive bleeding, dizziness, or signs of infection (like redness or fever), contact your healthcare provider.
  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