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Dr Michael Merrett  
Dr Sharon Marks 
Frankston Private Diagnostic Unit


Expert medical services in Frankston

At Frankston Private Specialist Doctors, your health is in the hands of highly skilled professionals, each of whom is a specialist in their chosen area of medicine. This means you can be sure that you are being looked after by someone who has devoted their life to studying and working in a specific branch of medicine to offer authoritative and accurate diagnoses and a range of advanced, expertly handled procedures. 

Dr Michael Merrett


Dr Merrett is a fully qualified and experienced Consultant Physician and Gastroenterologist who specialises in advanced gastrointestinal endoscopic techniques.

After studying medicine and graduating with honours from Monash University, Dr Merrett went on to 4 years of post-graduate training in Internal Medicine, followed by 3 years of specialist training in Gastroenterology at Prince Harry's and St. Vincent's hospitals in Melbourne. He then took on a two-year appointment at Oxford University as a Senior Research Fellow in the specialist field of gastroenterology. His time there included important research in advanced endoscopic techniques and inflammatory bowel disease.

Dr Merrett has been in private practice as a Gastroenterologist for over 20 years and is recognised as a leading authority in the field, with his research appearing in Australian and International scientific publications and medical journals.

Dr Merrett's specialist areas of interest include:

  • Colonoscopy and bowel cancer screening
  • Inflammatory bowel disease (Chron's disease, ulcerative colitis and coeliac disease)
  • ERCP (Endoscopy of the bile duct/liver and pancreas)
  • Endoscopic intervention in cancer (including stents throughout the GI tract, NdYAG laser, APC therapy and gastrostomy tubes)
  • Advanced therapies of Barrett’s oesophagus (including endoscopic mucosal resection and HALO ablation)
  • Gastric balloons for management of obesity
  • Gastroesophageal reflux (including medical and endoscopic therapies)
  • Routine gastroscopy
  • Capsule endoscopy (“Pillcam”)
  • Jaundice and liver disease (excluding viral hepatitis)

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Dr Sharon Marks

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Dr Marks is a Consultant Physician, specialising in Clinical Nutrition and Metabolism. As a fully qualified medical specialist, a referral from a G.P. or another specialist is required for all patients.

Dr Marks is a highly regarded authority in her field and is the Head of the Clinical Nutrition and Metabolism Unit at Monash Medical Centre, as well as being Co-ordinator of the Multi-Disciplinary Bariatric Assessment Clinic. She also runs the Body Composition Laboratory at the hospital, which conducts research and assessment of nutrition related disorders.

With over 20 years’ experience in private practice as a Consultant Physician, Dr Marks provides unrivalled expertise on nutrition and is able to use prescription medication, along with advice and assessment, to treat patients in all aspects of under-nutrition and over-nutrition. She is also actively involved in important, ongoing research into the area of obesity.

Dr. Mark's specialist areas of interest include:

  • Obesity and related disorders
  • High cholesterol / high triglycerides
  • Type 2 diabetes
  • Osteoporosis
  • Eating disorders (anorexia and bulimia)
  • Coeliac disease
  • Short bowel syndrome
  • Wasting disorders / unexplained weight loss

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Frankston Private Diagnostic Unit


Frankston Private Diagnostic Unit (FPDU) offers a wide range of investigations of gastrointestinal motility as well as capsule endoscopy and carbohydrate breath testing.

Judy Hooper is a Clinical Nurse Specialist with more than 10 years experience in this field. Judy also overseas the inflammatory bowel disease program coordinating the administration of biologic agents Infliximab and Humira.

Investigations available at FPDU include Carbohydrate breath testing,Oesophageal Studies, Capsule Endoscopy, Anorectal Physiology Studies and Colonic Transit Study.

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