White Blood Cell Count with Differential Automated Analysis (Auto WBCD)
This test measures the total number of white blood cells (WBCs) in your blood and breaks them down into different types, helping your doctor assess your immune system and overall health.
["WBC count and type help detect infections, inflammation, or other blood disorders."]
Key facts at a glance
- LOINC
- 805-2
- Short code
- WBC # CSF Auto
- Synonyms
- WBC # CSF Auto
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- 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
- automated-count
- CPT
- 85004
- SNOMED
- 900000000000003002
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters
White blood cells (WBCs) are your body’s immune system workers. They help fight infections and protect against diseases. The test checks both the total number of WBCs and the proportions of different types, such as neutrophils, lymphocytes, monocytes, eosinophils, and basophils. This can help identify issues like infections, allergies, or blood disorders.
What to Expect Before the Test
No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw blood. If you’re nervous, let your healthcare provider know—they can help make the process more comfortable.
What the Results Mean
The results show your total WBC count and the percentage of each type. For example, a high neutrophil count might suggest an infection, while a high lymphocyte count could indicate a chronic condition like lupus. Your doctor will compare these results to your medical history and other tests to determine what’s going on.
Common Reasons for Testing
Doctors order this test to diagnose or monitor conditions like infections (such as pneumonia or urinary tract infections), blood disorders (like leukemia or anemia), autoimmune diseases (like lupus or rheumatoid arthritis), or allergies.
Reference range
Adult: 4.5-11.0 x 10^9/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal WBC counts or differentials can signal underlying health issues. For instance, an elevated WBC count may indicate an infection, while a low count could suggest immune deficiency or other problems. Your doctor will use these results alongside symptoms and other tests to guide treatment.
Short name
WBC with Differential
Frequently asked questions
How long does it take to get my results?
What if my results are outside the normal range?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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