Mononuclear Cell Count in Blood (Absolute)
This test measures the number of mononuclear white blood cells (lymphocytes and monocytes) in your blood. These cells play a key role in fighting infections and maintaining immune function.
["This test helps assess immune health and response to infections."]
Key facts at a glance
- LOINC
- 30443-6
- Short code
- Mononuc Cells NFr Gast
- Synonyms
- Mononuc Cells NFr Gast
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- 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 This Test Might Be Ordered
Your healthcare provider may order this test to evaluate your immune system, diagnose or monitor conditions like infections, autoimmune diseases, or certain blood disorders. It can also help determine the effectiveness of treatments targeting the immune system.
What to Expect Before the Test
No special preparation is needed for this test. You’ll have a small needle inserted into your arm or hand to draw a blood sample. The process usually takes a few minutes, and you may feel a slight pinch or discomfort.
What the Test Results Mean
Results are typically reported as the absolute count of mononuclear cells per microliter of blood. Elevated levels may indicate conditions like chronic infections or certain cancers, while very low levels could suggest immune deficiencies or other health issues.
Common Conditions Monitored or Diagnosed
This test is often used to monitor immune function in patients with conditions like HIV/AIDS, lymphoma, or leukemia. It may also help track responses to treatments such as chemotherapy or immune-modulating therapies.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Mononuclear cell counts can provide important clues about your immune system’s status. High counts may signal overactive immune responses or infections, while low counts could indicate weakened immunity or underlying diseases affecting blood cell production.
Short name
Mononuclear Cell Count
Frequently asked questions
What does a high or low mononuclear cell count mean?
How often should I get this test?
Can lifestyle changes affect mononuclear cell counts?
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 17, 2026. · Read our editorial policy