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Lymphocyte Count in Blood (Absolute)

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

This test measures the number of lymphocytes, a type of white blood cell that helps protect your body from infections and diseases.

Quick summary

["Lymphocytes help fight infections and support immune function; abnormal counts may signal health concerns."]

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

Key facts at a glance

LOINC
82224-7
Short code
RPI Lymphblst-cCnt
Synonyms
RPI Lymphblst-cCnt
Category
electrolyte
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Your doctor may order this test to evaluate your immune system, check for infections, or monitor conditions like leukemia, lymphoma, or autoimmune diseases. It’s often done alongside other blood tests to assess overall health or diagnose specific issues.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or hand to draw blood. If you’re nervous, let your healthcare provider know—they can help make the process more comfortable.

What the Results Mean

Results show the count of lymphocytes in your blood. Low counts may indicate weakened immunity, while high counts could suggest chronic infections, inflammation, or certain cancers. Your doctor will interpret results in the context of your overall health and symptoms.

Common Conditions Monitored

This test helps diagnose or monitor conditions like HIV/AIDS, certain cancers (e.g., lymphoma), chronic infections (e.g., tuberculosis), or autoimmune disorders (e.g., lupus). It’s also used to track immune responses after treatments like chemotherapy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lymphocyte Count

Frequently asked questions

What are the normal reference ranges for this test?
Normal ranges can vary by lab and individual. Your doctor will provide your specific results and explain what they mean for your health. Reference ranges are just guidelines and don’t replace professional medical advice.
How often should I get this test?
Your doctor will determine how often you need this test based on your health status, symptoms, or treatment plan. Regular monitoring may be part of managing chronic conditions or post-treatment follow-ups.
Can lifestyle changes affect my lymphocyte count?
Yes, lifestyle factors like diet, stress, sleep, and exercise can influence immune function. Avoiding infections, eating a balanced diet, and managing stress may support healthy lymphocyte levels, but results depend on overall health and medical conditions.
  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