Private Tissue Transglutaminase IgA (Coeliac) ** Blood Test in the City of London
Test price
£76
+ £50 blood draw
Results in 2 days"
Pay at clinic
Tissue Transglutaminase IgA (Coeliac) ** blood test with fast, accurate results from our City of London clinic.
2 min from St Paul's station · short walk from Bank, Blackfriars & Barbican
Tissue Transglutaminase IgA (Coeliac) (Venous)**
Test fee £76 + £50 phlebotomy fee (per visit)
- Results in 2 days"
- UKAS accredited laboratory
- Professional phlebotomy service
- Confidential results portal
Or call 020 7183 3709
Pay at clinic on the day of your appointment
The Tissue Transglutaminase IgA (Coeliac) (Venous)** is available at our clinic in The City of London for £76.
* Excluding £50 phlebotomy fee (per visit)
Coeliac disease is an autoimmune condition where the immune system reacts to gluten, a protein found in wheat, barley, and rye. This immune reaction damages the lining of the small intestine and can impair nutrient absorption.
Coeliac disease affects approximately 1 in 100 people in the UK, though many cases remain undiagnosed. Blood tests that detect specific antibodies are the first step in investigating suspected coeliac disease.
What the Tissue Transglutaminase IgA (Coeliac) (Venous)** Measures
- Tissue transglutaminase antibodies (tTG-IgA) — the primary screening marker for coeliac disease
- Total IgA — to ensure the antibody test is valid (IgA deficiency can cause false negatives)
- Deamidated gliadin peptide antibodies — an additional marker used in some profiles
When This Test May Be Helpful
- Persistent digestive symptoms such as bloating, diarrhoea, or abdominal pain
- Unexplained iron deficiency anaemia
- Unexplained weight loss or fatigue
- A family history of coeliac disease
- Skin conditions such as dermatitis herpetiformis
- Unexplained nutrient deficiencies (e.g. folate, calcium, vitamin D)
- Screening in associated conditions (e.g. type 1 diabetes, autoimmune thyroid disease)
Preparation Before Your Test
You must be eating gluten-containing foods regularly for at least 6 weeks before this test. Removing gluten from your diet before testing can produce a false negative result.
If you have already started a gluten-free diet, speak with your GP before booking this test.
Understanding Your Results
Results are typically available within 2 days" and are delivered securely.
A positive tTG-IgA result suggests the presence of coeliac-related antibodies. However, coeliac disease cannot be diagnosed from a blood test alone — a gut biopsy is usually required to confirm the diagnosis.
Importantly, you must be eating gluten regularly at the time of the test (for at least 6 weeks) for the antibody test to be accurate. If you have already removed gluten from your diet, discuss this with your GP before testing.
Important Information
This test provides laboratory results only. A positive result requires further clinical assessment, typically including a gut biopsy, to confirm a diagnosis of coeliac disease. Please consult your GP.
Specialist Health Assessment
This specialist test provides specific insights to share with your GP or specialist.
- Specific symptoms
- GP or specialist recommendation
- Health monitoring
- Supporting clinical decisions
- Additional health data
- Peace of mind
How It Works
Book Online
Choose a convenient date and time
Visit Our Clinic
Ave Maria Lane, City of London
Quick Blood Draw
Professional phlebotomy - 5 minutes
Get Results
Results in 2 days"
Frequently Asked Questions
Common questions about this blood test
Visit Our London Clinic
Central London location with excellent transport links
Address
St Paul's Medical & Dental
Ave Maria Lane
The City of London
London EC4M 7AQ
Getting Here
- Walking distance from St Pauls, Blackfriars, Bank and Barbican stations
- Circle, District & Piccadilly lines
Opening Hours
Current opening hours:
- Monday – Friday8am–6pm (Fri until 5pm)
- SaturdayClosed
- SundayClosed
Contact
Ready to Book Your Test?
No GP referral needed. Book online and get tested at our City of London clinic. Results within 2 days".
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Patient Reviews
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Providing exceptional dental and medical care to the City of London community — 2 minutes from St Paul's station.
Meet Our Medical Team
Our experienced medical team is fully qualified and registered with the GMC and NMC, delivering safe, high-quality care in line with the highest professional standards.
Because our patients deserve nothing less.
Registered. Regulated. Trusted.
At St Paul's Medical & Dental, we are registered with the Care Quality Commission (CQC) as Medical and Dental Limited (Provider ID: 1-29171948282), and our clinicians are registered with the relevant UK regulatory bodies, including the GDC and GMC. Our dentists, dental nurses and medical professionals deliver care that meets the highest clinical, safety and ethical standards, because our patients deserve nothing less.
Visit us at St Paul's
Private blood tests beside St Paul’s Cathedral — 2 minutes from St Paul’s tube and a short walk from Bank, Blackfriars and Barbican. Early appointments from 8am.
5 Ave Maria Lane, The City of London, EC4M 7AQ
We Accept All Major Dental Insurances
Use your workplace or personal dental cover with us. We provide itemised receipts and completed claim forms for all major UK insurers — including AXA Health, Aviva, Bupa, Cigna, Vitality, Westfield Health, WPA, Unum, and Boots Dental Plan.
You pay for treatment at the clinic and claim reimbursement from your insurer. Cover levels vary by policy — check your plan details. All insurer names and trademarks belong to their respective owners.