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Dermatitis Herpetiformis IgG Antibody, Serum

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

A blood test that measures IgG antibodies associated with dermatitis herpetiformis, an itchy, blistering skin condition linked to celiac disease.

Quick summary

["A positive result can support dermatitis herpetiformis, but it must be interpreted with your symptoms and other celiac disease tests."]

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

Key facts at a glance

LOINC
110015-5
Short code
B dermat IgG Msmt Ser
Synonyms
B dermat IgG Msmt Ser
Category
liver
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

What is this test?

This test measures IgG antibodies that may be associated with dermatitis herpetiformis. Dermatitis herpetiformis is an itchy, blistering rash that most often develops in people with celiac disease.

Why might I need this test?

Your clinician may order this test when you have an intensely itchy, blistering rash or other symptoms suggesting dermatitis herpetiformis. It may also be considered when skin symptoms are related to celiac disease or when standard antibody testing is inconclusive.

How is the test performed?

A blood sample is drawn and the serum is tested for dermatosis herpetiformis-associated IgG antibodies. The exact laboratory method may vary, and results are usually reported as positive or negative or with an antibody level.

How do I prepare for the test?

Fasting is generally not required for this test, but follow your clinician or laboratory's instructions. Tell the healthcare team if you have recently started or stopped a gluten-free diet, because this can affect antibody results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Dermatitis herpetiformis IgG antibody

Frequently asked questions

Does a positive result mean I have dermatitis herpetiformis?
Not by itself. A positive result increases suspicion for dermatitis herpetiformis, but your clinician must consider your rash, medical history, and other laboratory findings.
Is dermatitis herpetiformis the same as celiac disease?
No. Dermatitis herpetiformis is a skin condition associated with celiac disease, so a positive result may lead your clinician to evaluate you for celiac disease.
Can I have this test while following a gluten-free diet?
Yes, but antibody levels may change after gluten is removed from the diet. Tell your clinician when the diet began because this can help interpret the result accurately.
  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