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Lymphocyte Count in Whole Blood by Automated Hematology

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

This test measures the number of lymphocytes, a type of white blood cell, in your blood. Lymphocytes help fight infections and maintain immune function.

Quick summary

["Lymphocytes are key to your immune system and help protect your body from illness."]

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

Key facts at a glance

LOINC
30423-8
Short code
Lymphoma Cells NFr Bld
Synonyms
Lymphoma Cells NFr Bld
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 This Test Might Be Ordered

Your doctor may recommend this test to check for infections, monitor immune function, or evaluate conditions like lymphoma, leukemia, or autoimmune diseases. It can also help assess how your body responds to treatments for these conditions.

What to Expect Before the Test

You won’t need any special preparation. The test involves a simple blood draw from a vein, usually in your arm. The process takes a few minutes, and you may feel a slight pinch or discomfort, but it’s generally quick and painless.

What the Results Mean

Lymphocyte counts can vary based on your overall health, age, and medical conditions. High counts may indicate an overactive immune response, while low counts could suggest immune suppression or certain infections. Your doctor will interpret the results in the context of your medical history and symptoms.

Common Conditions Affecting Results

Conditions like chronic infections, certain cancers (such as lymphoma or leukemia), or autoimmune diseases can influence lymphocyte levels. Stress, medications, or recent illnesses may also temporarily affect your count.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lymphocyte count

Frequently asked questions

How often will I need this test?
The frequency depends on your health condition and treatment plan. Some people may need this test monthly, quarterly, or annually, while others might only need it once or as needed for monitoring.
What does a normal range mean for me?
A normal range doesn’t mean your count is perfectly healthy—it’s a general guideline. Your doctor will consider your overall health, symptoms, and medical history to determine if your results are within an expected range or if further action is needed.
Can lifestyle changes affect my lymphocyte count?
Yes, lifestyle factors like diet, stress, sleep, and exercise can influence your immune system. Maintaining a balanced diet, managing stress, and getting enough rest may help support healthy lymphocyte levels, but results can vary among individuals.
  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