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Immunoassay for Lymphocyte Subset Blood Count (Manual Qualitative)

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

This test evaluates the qualitative presence of specific lymphocyte subtypes in your blood, often used to assess immune function or response to treatment.

Quick summary

["A manual check of immune cell types may help diagnose or monitor conditions like infections, immune deficiencies, or autoimmune disorders."]

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

Key facts at a glance

LOINC
76142-9
Short code
Imm Lymphs Bld Ql Manual
Synonyms
Imm Lymphs Bld Ql 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

What This Test Measures

This test identifies key types of white blood cells (lymphocytes) in your blood, including subsets like T-cells, B-cells, and natural killer (NK) cells. The manual immunoassay detects these cells qualitatively rather than quantifying their exact numbers.

Why It’s Done

Your healthcare provider may order this test to evaluate your immune system’s composition, especially if you have symptoms like frequent infections, unusual fatigue, or suspected autoimmune conditions.

Sample Collection and Processing

A blood sample is drawn, and the test uses a manual immunoassay method to identify lymphocyte subtypes. Results are qualitative, meaning they indicate presence or absence rather than precise counts.

What to Expect Before the Test

No special preparation is needed. You may have a brief blood draw, and results are typically reviewed by a lab specialist to assess immune cell distribution.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal lymphocyte subset patterns can signal immune disorders (e.g., low T-cells may indicate HIV or other immunodeficiency), chronic infections, or conditions like lymphoma. This test helps guide treatment decisions for immune-related conditions.

Short name

Lymphocyte Subset Manual Check

Frequently asked questions

When might I need this test?
Your doctor may recommend this test if you have symptoms like repeated infections, unexplained fatigue, or if you’re undergoing treatment for an immune-related condition.
What does a positive or abnormal result mean?
An abnormal result may indicate an imbalance in lymphocyte subtypes, which could point to an immune disorder, infection, or other health concerns. Your provider will discuss findings with you.
How often will I need this test?
Frequency depends on your health needs. Your doctor will determine how often this test is necessary based on your symptoms, treatment plan, or ongoing 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