Coeliac Disease Specialist Sydney

What is a Coeliac Disease Specialist?

A coeliac disease specialist is usually a gastroenterologist who assesses, diagnoses and manages coeliac disease and related digestive conditions. This may include arranging blood tests, reviewing symptoms, performing gastroscopy with small-bowel biopsy when needed, checking for nutrient deficiencies, and helping patients plan long-term follow-up.

For patients in Sydney, seeing a gastroenterologist experienced in coeliac disease can help confirm the diagnosis, assess the extent of bowel involvement, guide treatment, and monitor long-term health. Dr James Pang provides specialist assessment for patients with suspected or confirmed coeliac disease, including those with abdominal pain, bloating, diarrhoea, constipation, iron deficiency, unexplained fatigue or abnormal blood tests.

A specialist assessment can help distinguish coeliac disease from other conditions such as irritable bowel syndrome, inflammatory bowel disease, lactose intolerance, non-coeliac gluten sensitivity, small intestinal bacterial overgrowth, microscopic colitis and other causes of malabsorption.

When to See a Coeliac Disease Specialist?

You may benefit from seeing a coeliac disease specialist if you have symptoms or test results that suggest coeliac disease, or if you have already been diagnosed and need ongoing care.

Patients commonly referred for coeliac disease assessment include people with:

Persistent bloating or abdominal pain: Symptoms that continue despite dietary changes or usual treatment may need specialist review.
Chronic diarrhoea or constipation: Coeliac disease can cause either bowel looseness or constipation, and symptoms may overlap with IBS.
Iron deficiency or low vitamin levels: Poor absorption from small bowel inflammation can contribute to low iron, folate, vitamin B12 or vitamin D.
Unexplained tiredness: Fatigue may be related to nutrient deficiency, inflammation or another underlying condition.
Family history of coeliac disease: First-degree relatives have a higher risk and may require screening.
Positive coeliac blood tests: Abnormal coeliac serology often requires further assessment and sometimes biopsy confirmation.
Symptoms after eating gluten: Symptoms after eating wheat or gluten-containing foods should be investigated carefully, rather than assuming gluten intolerance.
Previous uncertain diagnosis: Some patients have been placed on a gluten-free diet without formal testing and may need a structured review.
Associated autoimmune conditions: Coeliac disease is more common in people with some autoimmune conditions, including type 1 diabetes and autoimmune thyroid disease.

Benefits of Seeing a Coeliac Disease Specialist

A specialist review can help provide a clear diagnosis and reduce the risk of unnecessary dietary restriction.

The main benefits include:

Accurate diagnosis: Coeliac disease should be confirmed properly before committing to a lifelong gluten-free diet. Australian Prescriber notes that definitive diagnosis requires gastroscopy and duodenal biopsy, and that an empirical trial of a gluten-free diet has no role in diagnosis.
Appropriate testing: A gastroenterologist can advise whether blood tests, genetic testing, gastroscopy or biopsy are required.
Avoiding false negative results: Starting a gluten-free diet before testing may make results unreliable.
Identifying other causes of symptoms: If coeliac disease is not confirmed, other conditions may need to be investigated.
Nutritional assessment: Coeliac disease may affect the absorption of iron, folate, vitamin B12, calcium and vitamin D.
Monitoring recovery: Follow-up can help assess whether symptoms, blood tests and bowel healing are improving.
Long-term risk reduction: Strict management can reduce the risk of ongoing inflammation, nutritional deficiencies and bone health complications.

Types of Coeliac Disease Presentations

Coeliac disease does not always look the same. It may present in several ways.

Classical coeliac disease: This often includes digestive symptoms such as diarrhoea, weight loss, bloating, abdominal pain or nutrient malabsorption.
Non-classical coeliac disease: Some patients have fatigue, iron deficiency, low bone density, mouth ulcers, headaches, abnormal liver tests or fertility issues without obvious bowel symptoms.
Silent coeliac disease: Blood tests and biopsy may show coeliac disease even when symptoms are mild or absent.
Potential coeliac disease: Blood tests may suggest coeliac disease, but biopsy findings may not yet show typical small bowel damage.
Refractory or non-responsive coeliac disease: Symptoms or abnormal blood tests may continue despite a gluten-free diet. This requires careful review to check for gluten exposure, another diagnosis or less common complications.

What to do Before Seeing a Coeliac Disease Specialist

Before your appointment, it is helpful to gather relevant information and avoid changing your diet without medical advice.

Keep eating gluten if you are still being tested: Testing is most accurate when gluten is still part of the diet. Coeliac Australia advises that starting a gluten-free diet before testing can cause falsely negative or unreliable results.
Bring previous blood test results: This may include coeliac serology, iron studies, full blood count, vitamin levels, liver function tests and thyroid tests.
List your symptoms: Include digestive symptoms, tiredness, weight changes, skin symptoms, mouth ulcers, bone pain or menstrual/fertility history if relevant.
Record your diet history: Tell your doctor if you have already reduced or removed gluten.
Bring family history: Mention relatives with coeliac disease, autoimmune disease, bowel disease or unexplained anaemia.
List medications and supplements: Include iron, vitamin D, calcium, probiotics, antacids and any regular medicines.

If you have already stopped eating gluten, your specialist may discuss genetic testing or a supervised gluten challenge. A negative HLA gene test can help rule out coeliac disease, but a positive result does not confirm the diagnosis by itself.

What Happens During a Coeliac Disease Specialist Appointment?

During your appointment, Dr Pang will usually review your symptoms, medical history, family history, diet, previous investigations and current medications. The aim is to determine whether coeliac disease is likely and what testing is needed.

Assessment may include:

Symptom review: This includes abdominal pain, bloating, diarrhoea, constipation, nausea, reflux, weight loss, fatigue and nutrient deficiency symptoms.
Blood test review: Coeliac serology may be assessed alongside total IgA levels, because some patients have IgA deficiency, which can affect test interpretation.
Nutritional review: Iron, folate, vitamin B12, vitamin D, and calcium status may be assessed.
Discussion of gastroscopy: If coeliac disease is suspected, gastroscopy with small bowel biopsy may be recommended. Coeliac Australia describes small bowel biopsy as the gold standard for confirming coeliac disease.
Assessment for other conditions: Depending on symptoms, other causes of abdominal pain, bloating, diarrhoea or malabsorption may also be considered.

Gastroscopy and Small Bowel Biopsy for Coeliac Disease

Gastroscopy is a procedure in which a thin, flexible camera is passed through the mouth into the oesophagus, stomach, and the first part of the small bowel. Small tissue samples can be taken from the duodenum to look for changes consistent with coeliac disease.

The procedure is commonly performed with sedation. The biopsy samples are then examined under a microscope. This can help confirm whether the small bowel lining has been affected by gluten-related immune activity.

A biopsy is particularly important when blood test results are positive, symptoms are significant, the diagnosis is uncertain, or the patient needs formal confirmation before committing to lifelong dietary treatment.

What to Expect After Coeliac Disease Diagnosis?

If coeliac disease is confirmed, the main treatment is a strict lifelong gluten-free diet. Once coeliac disease has been diagnosed, the main treatment is lifelong avoidance of gluten-containing foods.

After diagnosis, care may include:

Dietitian referral: A dietitian experienced in coeliac disease can help patients remove gluten safely while maintaining good nutrition.
Nutrient replacement: Iron, vitamin D, calcium, folate or B12 may be recommended if deficiencies are present.
Follow-up blood tests: Coeliac antibody levels and nutritional markers may be monitored.
Bone health assessment: Some patients may need bone density testing, especially if there has been long-term malabsorption, low vitamin D or fracture risk.
Family screening advice: Close relatives may be advised to discuss testing with their GP.
Monitoring symptoms: Ongoing symptoms should be reviewed rather than assumed to be normal.

Coeliac Disease Risks and Possible Complications

Untreated or poorly controlled coeliac disease may increase the risk of ongoing symptoms and nutritional problems.

Possible issues include:

Iron deficiency anaemia
Low folate, B12, vitamin D or calcium
Osteopenia or osteoporosis
Weight loss or poor weight gain
Infertility or pregnancy-related concerns in some patients
Persisting fatigue
Mouth ulcers or dental enamel issues
Liver test abnormalities
Ongoing small bowel inflammation

Rarely, long-term untreated coeliac disease may be associated with more serious complications. This is why accurate diagnosis, strict treatment and follow-up are important.

What if Coeliac Disease Assessment is Delayed?

Delayed diagnosis can lead to months or years of avoidable symptoms. Some patients are treated for IBS, reflux, anaemia or fatigue before coeliac disease is identified. If coeliac disease remains undiagnosed, the small bowel may continue to be exposed to gluten, which can affect nutrient absorption and general health.

Delaying assessment may also complicate the diagnostic process if the patient starts a gluten-free diet before testing. Blood tests and biopsy results may become falsely negative, leading to uncertainty.

Patients in Sydney with persistent abdominal symptoms, unexplained iron deficiency, chronic bloating, diarrhoea, constipation or a family history of coeliac disease should consider medical review.

When to Book an Appointment?

You may consider booking an appointment with Dr Pang if you have:

Ongoing abdominal pain, bloating or altered bowel habits
Positive coeliac blood tests
Low iron or unexplained anaemia
Symptoms that improve when avoiding gluten, but no formal diagnosis
A family history of coeliac disease
Ongoing symptoms despite a gluten-free diet
Uncertainty about whether symptoms are due to coeliac disease, IBS or another digestive condition

Dr Pang provides specialist gastroenterology care for patients across Sydney, including the North Shore, Northern Beaches, Chatswood, Frenchs Forest, Gosford and surrounding areas.

FAQs About Coeliac Disease Specialist Sydney

Should I stop eating gluten before testing?

No. Keep eating gluten unless your doctor advises otherwise. Stopping gluten too early can make blood tests and biopsy results less reliable.

Can coeliac disease be diagnosed with a blood test?

Blood tests are usually the first step, but many adults also need a gastroscopy with small bowel biopsy to confirm the diagnosis.

What symptoms suggest coeliac disease?

Common symptoms include bloating, abdominal pain, diarrhoea, constipation, tiredness, iron deficiency, low vitamin levels and unexplained weight loss.

Is coeliac disease the same as gluten intolerance?

No. Coeliac disease is an autoimmune condition that can damage the small bowel. Gluten intolerance may cause symptoms but does not usually cause the same bowel damage.

What happens after coeliac disease is diagnosed?

Treatment usually involves a strict lifelong gluten-free diet, follow-up blood tests, checking nutrient levels and sometimes dietitian support.