ORDER
Order and referral check
Order your test. We review the order and check whether a referral or other information is required before the next step can begin.
Practitioner grade
NutriPath
Coeliac disease blood screen
NutriPath pathology testing
A blood screen measuring antibodies used when investigating coeliac disease. Speak with your practitioner about preparation and how your current diet may affect the result. Screening results may require further assessment.
About this test
Coeliac disease affects approximately one in 70 Australians but remains substantially underdiagnosed. Many people spend years with unexplained fatigue, iron deficiency, gut symptoms, osteoporosis or infertility before the coeliac connection is identified. Complete coeliac serology is the first step in diagnosis. Tissue transglutaminase (tTG) IgA is the primary screening marker, with sensitivity around 95 percent when gluten is in the diet. Deamidated gliadin peptide (DGP) antibodies add sensitivity in seronegative or paediatric cases. Total IgA is essential to check, because one in 400 people have selective IgA deficiency, which will produce a false negative on IgA based coeliac tests and requires IgG testing instead. This complete panel captures all four markers so no pattern is missed. Critically, you must be consuming gluten for at least 6 weeks before testing, or results will be falsely negative.
What it measures
- Tissue Transglutaminase IgA (tTG IgA)
- Tissue Transglutaminase IgG (tTG IgG)
- Deamidated Gliadin Peptide IgA (DGP IgA)
- Deamidated Gliadin Peptide IgG (DGP IgG)
- Total IgA
Test details
CollectionBlood collection provider
LabNutriPath
When to expect your results
48 hours after the laboratory receives your sample
Allow time for order and referral checks, your collection appointment and sample transport. Laboratory processing starts after your sample reaches the testing laboratory.
See the steps from order to results
Practitioner consult session
A 15-minute consultation. An email link will be included in your order confirmation to make the booking.
Optional 1:1 with our clinical team · $49
What it measures
Tissue Transglutaminase IgA (tTG IgA)
Blood (SST)
The primary coeliac screening antibody. Highly sensitive and specific when gluten is in the diet.
Tissue Transglutaminase IgG (tTG IgG)
Blood (SST)
Used in people with IgA deficiency to avoid false negatives on the IgA based test.
Deamidated Gliadin Peptide IgA (DGP IgA)
Blood (SST)
Adds sensitivity, particularly in children and in seronegative coeliac disease.
Deamidated Gliadin Peptide IgG (DGP IgG)
Blood (SST)
The most useful marker in IgA deficient individuals.
Total IgA
Blood (SST)
Essential context. IgA deficiency affects 1 in 400 people and will produce false negative results on IgA based coeliac tests.
Your testing journey
From your order to your results.
Order and referral review, sample collection, laboratory analysis and discussing your report are separate stages. Your test’s processing estimate covers the laboratory stage.
ARRANGE
Arrange your collection
Once the required checks are complete, follow the collection form and instructions for the nominated provider. Check appointment and preparation requirements.
COMPLETE
Provide your sample
Attend the nominated collection provider with the required form. Your sample then needs to reach the testing laboratory before processing begins.
RESULTS
Laboratory processing
Once the laboratory receives your sample, it completes the analysis and prepares your report. Discuss the findings with your practitioner alongside your symptoms and health history.
Preparing for this test
Read the instructions supplied for your exact test before collecting. Check food, drink, medicines, timing, storage and return requirements with your practitioner. Do not stop prescribed medicines without advice.
Does the estimate include postage?
No. The laboratory estimate does not include order review, referral checks, delivery to you, the time you take to collect, or transport back to the testing laboratory. These stages make up the full order-to-results journey.
Need results by a particular date?
Check with Evergreen before ordering so the referral requirements, collection timing, delivery and laboratory estimate can be considered together.
Ask Evergreen about timingBefore you order.
Practical questions about choosing, preparing for and reviewing this test.
Do I need a consultation or referral?
Requirements vary by test. Check the ordering options on this page and confirm any referral requirements with Evergreen. A laboratory’s practitioner-referral requirement is separate from whether you need to book an additional consultation.
Should I change medicines or supplements before testing?
Do not stop prescribed medicines on your own. Tell your practitioner what you take and follow the preparation instructions for this test. Timing, fasting and other requirements depend on the sample and markers being measured.
Does the test tell me what treatment I need?
A result is one part of an assessment. A qualified practitioner should interpret it alongside your symptoms, history and medicines. Check whether a results consultation is included in your purchase or needs to be booked separately.
How should I read the reference ranges?
Use the reference intervals and units on your own laboratory report. Ranges can vary with the method and patient factors. A result inside or outside a range does not establish a diagnosis on its own.
Who is the testing provider?
These tests are supplied through NutriPath, a medical laboratory founded in 2011 and based in Burwood, Victoria. NutriPath works through a practitioner-referral system.
When does the turnaround estimate start?
The laboratory estimate is not the time from placing your order. Allow time for referral checks, kit dispatch where needed, sample collection and transport before processing. The estimate varies by test, and specialist or overseas analysis can take longer.
Follow the estimate for your specific test. A quoted 3–5 business days does not include the whole ordering and collection journey.
Where do I find preparation and collection instructions?
Use the instructions supplied for your exact kit. Blood tests may require an arranged collection appointment; receiving a kit does not mean you should draw blood yourself. Saliva, urine, stool and breath tests each have different preparation requirements.
Need help choosing?
Find a test that fits your question.
Compare the sample type and what each test measures, or use the guide to narrow your options.