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Mononuclear Cell Count in Peripheral Blood (Automated)

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

This test measures the number of mononuclear cells (white blood cells like lymphocytes and monocytes) in your blood, counted automatically by a machine.

Quick summary

["Knowing your mononuclear cell count helps assess immune function and detect infections or blood disorders."]

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

Key facts at a glance

LOINC
70038-5
Short code
Mononuc Cells NFr Prt Auto
Synonyms
Mononuc Cells NFr Prt Auto
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
automated-count
CPT
86592
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 Is Done

Doctors may order this test to evaluate your immune system, check for infections, monitor blood disorders (like leukemia or lymphoma), or assess conditions affecting white blood cell counts, such as HIV or autoimmune diseases.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein for a blood draw, which usually takes a few minutes. Wear comfortable clothing and bring any medications you’re currently taking.

What the Results Mean

Results show the total count of mononuclear cells (lymphocytes and monocytes) in your blood. Abnormal counts may signal infections, immune disorders, or other health issues that need further evaluation.

Common Conditions Affecting Results

Low mononuclear cell counts might indicate immune deficiencies, severe infections, or certain cancers. High counts could suggest chronic infections, inflammation, or blood disorders like leukemia.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Mononuclear Cell Count

Frequently asked questions

Can I eat or drink before this test?
You can eat and drink normally, as no fasting is required. However, inform your doctor if you’re taking blood-thinning medications or have a history of bleeding disorders.
How long will it take to get my results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your doctor will discuss them with you during your follow-up visit.
What if my results are outside the normal range?
If your results are abnormal, your doctor may recommend additional tests or treatments. They’ll explain what your findings mean in the context of your overall health and next steps.
  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