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Immunoassay for Milk-Specific Immunoglobulin G (IgG) in Serum or Plasma

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

This test measures the presence of antibodies against milk proteins in your blood, which may help diagnose or monitor conditions like cow’s milk allergy or related sensitivities.

Quick summary

["Assesses immune response to milk proteins for allergy or sensitivity evaluation."]

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

Key facts at a glance

LOINC
99365-9
Short code
Sheep Milk IgG-mCnc
Synonyms
Sheep Milk IgG-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 healthcare provider may recommend this test if you have symptoms like digestive discomfort, skin reactions, or respiratory issues after consuming dairy products. It can also be used to confirm a suspected allergy or track immune responses over time.

How the Test Works

Blood is drawn and tested using an immunoassay method to detect milk-specific IgG antibodies. This helps identify if your immune system is reacting to milk proteins.

Sample Collection and Preparation

A blood sample is taken from a vein, usually in your arm. The sample is processed into either serum (after clotting) or plasma (after centrifugation) for testing.

What to Expect Before the Test

No special preparation is needed, but inform your provider about any medications or recent illnesses that could affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps diagnose or confirm a milk allergy or sensitivity by detecting antibodies against milk proteins. Elevated levels may indicate an immune response, while normal levels suggest no significant reaction. It can also be used in research or clinical studies to assess immune responses to food proteins.

Short name

Milk IgG Antibody Test

Frequently asked questions

What does a positive result mean?
A positive result suggests your immune system may be reacting to milk proteins, which could indicate an allergy or sensitivity. However, further testing and clinical correlation are needed to confirm symptoms and diagnosis.
Can this test detect other allergies besides milk?
No, this test specifically measures milk-specific IgG antibodies. Other allergy tests would be needed for different food groups or substances.
How soon will I get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will discuss the results with you during a follow-up visit.
  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