White Blood Cell Differential with Other Granulocyte Subtypes (Qualitative or Quantitative) by Immunoassay
This test measures specific types of white blood cells (WBCs) beyond the standard neutrophil count, including other granulocytes like eosinophils, basophils, and possibly atypical or immature cells. It helps assess immune function, infection responses, or blood disorders.
["This test helps identify unusual WBC patterns that may signal infections, allergies, or blood diseases."]
Key facts at a glance
- LOINC
- 30408-9
- Short code
- WBC Other NFr Plr
- Synonyms
- WBC Other NFr Plr
- Category
- chemistry
- Sample
- fluid
- 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
- CPT
- 85004
- SNOMED
- 900000000000003002
- Specimen volume
- 2-5 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h
- Hemolysis max
- 300
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your doctor may recommend this test if they suspect conditions like allergic reactions, chronic infections, blood cancers (e.g., leukemia), or immune system disorders. It can also be used to monitor treatment progress or diagnose conditions affecting WBC counts.
What to Expect Before the Test
No special preparation is needed. You’ll likely have a simple blood draw from a vein in your arm. If you’re on blood thinners, let your doctor know before the test.
What the Results Mean
Results compare the proportions of different WBC types to standard ranges. Abnormal counts (too high or too low) may indicate health concerns. Your doctor will interpret results in the context of your symptoms and medical history.
Common Conditions Linked to Abnormal Results
High or low counts of certain granulocytes (e.g., eosinophils) can signal allergies, infections, or inflammatory diseases. Basophils may rise with allergic reactions or certain cancers. Atypical WBCs could point to infections or immune disorders.
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.
◆Associated findings1
Short name
WBC Differential (Other Granulocytes)
Frequently asked questions
What does a ‘WBC other’ test measure beyond neutrophils?
Can fasting affect this test?
How often should I get 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