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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, in your blood. Monocytes help fight infections and inflammation.

Quick summary

["Monocytes support immune defense and inflammation response."]

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

Key facts at a glance

LOINC
58802-0
Short code
Mononuc Cells NFr DiafP
Synonyms
Mononuc Cells NFr DiafP
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
10
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82105
SNOMED
394971007
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 doctor may order this test to check for infections, autoimmune conditions, or other health issues that affect your immune system. It can also help monitor certain cancers or blood disorders.

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. It usually takes a few minutes.

What the Results Mean

Results are compared to standard ranges for healthy adults. Low or high levels may signal underlying health concerns, but interpretation depends on your overall health and symptoms.

Common Conditions Monitored

Monocyte counts are often checked in people with chronic infections, inflammatory diseases (like rheumatoid arthritis), or conditions like leukemia or lymphoma.

Reference range

Normal: <10 ng/mLN/A

Specimen: serum

No special preparation required. For PSA, avoid sexual activity for 24-48 hours before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Monocyte Level

Frequently asked questions

What causes a low monocyte count?
Low monocyte counts can result from infections, certain medications, or conditions like aplastic anemia or HIV. Your doctor may also investigate if you have unexplained fatigue or frequent infections.
What causes a high monocyte count?
High monocyte counts often appear with chronic infections, inflammatory diseases, or certain cancers. Stress, smoking, or certain medications may also raise levels.
How often should I get this test?
Your doctor will determine how often to check your monocyte count based on your health needs, symptoms, or treatment plan. Regular monitoring may be needed if you have ongoing conditions like autoimmune diseases or cancer.
  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