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Monocyte count (absolute)

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

This test measures the number of monocytes, a type of white blood cell that helps your body fight infections and remove dead cells.

Quick summary

["Monocytes help protect your immune system and maintain tissue health."]

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

Key facts at a glance

LOINC
32196-8
Short code
Monos+Macros Snv Ql Micro
Synonyms
Monos+Macros Snv Ql Micro
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
microscopy-light
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order a monocyte count to diagnose or monitor conditions like infections, inflammatory diseases, certain cancers, or immune system disorders. It can also help evaluate how your body responds to treatments.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into a vein in your arm, or your blood may be collected from a finger prick. The process is quick and usually painless.

How the Test Results Are Interpreted

Results are typically reported as the absolute number of monocytes per microliter (µL) of blood. While reference ranges vary by lab, abnormal levels may suggest infections, immune disorders, or other health concerns.

Common Conditions Monitored

High monocyte counts (monocytosis) can occur with chronic infections, certain cancers (e.g., leukemia), or inflammatory conditions like rheumatoid arthritis. Low counts (monocytopenia) may indicate immune deficiencies or severe infections.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Monocyte Level

Frequently asked questions

What does a high monocyte count mean?
A high monocyte count may signal chronic inflammation, an ongoing infection, or a condition like autoimmune diseases or certain cancers. Your doctor will consider your symptoms and other test results to determine the cause.
What does a low monocyte count mean?
Low monocyte counts can be linked to immune system disorders, severe infections, or certain medications. If you notice symptoms like frequent infections or fatigue, discuss your results with your healthcare provider.
Can lifestyle changes affect monocyte levels?
While diet and exercise can influence overall immune function, they do not directly alter monocyte counts. Stress, poor sleep, or chronic illness may indirectly impact your test results, so maintaining good health is important.
  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