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Immunoassay for Monocyte Count in Whole Blood

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

This test measures the number of monocytes, a type of white blood cell, in your blood using an immunoassay method. Monocytes help fight infections and inflammation.

Quick summary

["Your doctor may order this test to check for infections, immune disorders, or other blood-related conditions."]

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

Key facts at a glance

LOINC
33842-6
Short code
Imm Moncytes NFr Bld Manual
Synonyms
Imm Moncytes NFr Bld Manual
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
manual-count
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors may request a monocyte count test to diagnose or monitor conditions like chronic infections, certain cancers, or immune system disorders. It can also help assess how your body responds to treatments.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or hand to draw blood. Tell your healthcare provider if you have any concerns or conditions that might affect the test results.

What Happens During the Test?

Blood is collected in a tube and sent to the lab for analysis. The immunoassay method detects specific proteins on monocytes to count them accurately. Results are typically available within a few days.

What the Results Mean

Results show the number of monocytes per microliter of blood. Elevated levels may indicate infections, inflammation, or certain cancers, while low levels could suggest immune deficiencies or other conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High monocyte counts may signal chronic infections, autoimmune diseases, or certain cancers like leukemia. Low monocyte counts can indicate immune suppression, bone marrow disorders, or severe infections. Always discuss results with your healthcare provider for proper interpretation.

Short name

Monocyte Count (Manual Immunoassay)

Frequently asked questions

How long does it take to get my test results?
Results are usually available within 2 to 5 business days, depending on lab processing times. Your healthcare provider will contact you once they are ready.
Can I eat or drink before this test?
No special diet or fasting is required for this test. You can eat and drink normally as usual.
What if my results are outside the normal range?
If your results are abnormal, your doctor will review them with you and may recommend further testing or treatments based on your overall health and symptoms.
  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