Dr Zia Mazhar

Consultant Gastroenterologist


Specialises in

  • Dyspepsia (indigestion)
  • Irritable bowel syndrome (IBS) / inflammatory bowel disease
  • Liver disease
  • Gastrointestinal cancer
  • Endoscopy / endoscopic ultrasound

Also available for:

Virtual consultations:

I am a consultant gastroenterologist with a private practice at Spire Hartswood Hospital, Brentwood Essex.

I have performed - Gastroscopies: more than 4,000 procedures. Colonoscopies: more than 2,500 procedures. Caecal intubation rate: 98%, polyp detection rate: 45%. Excellent comfort scores.

I have been a consultant gastroenterologist at Basildon Hospital since 2011 and have extensive experience in inflammatory bowel disease this includes supervising the IBS, MDT and IBD clinics). I am a bowel cancer screening programme accredited colonoscopist and run the capsule endoscopy service at BTUH.

I obtained my initial general medical and gastroenterology training in UK. I then spent some years abroad and completed my gastroenterology training after returning to UK in 2003.


General Medical Council Number: C3608889

Treatment information

Some of the principal treatments carried out by Dr Zia Mazhar at Spire include:


Other treatments

  • Endoscopy
  • Inflammatory bowel disease

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Important information about COVID-19 tests

COVID-19 testing or antibody tests are not available as a standalone service at Spire Hartswood Hospital.


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Additional information

Inflammatory bowel disease

Special Clinical Interests: Irritable bowel syndrome, dyspepsia, inflammatory bowel disease, coeliac disease and small bowel disease, endoscopy, gastroscopy and colonoscopy, capsule endoscopy

Professional memberships

Royal College of Physicians (UK)

British Society of Gastroenterology

American Gastroenterological Association

London IBD Forum

Consultant Gastroenterologist, Basildon and Thurrock University Hospital NHS Foundation Trust

My husband is a consultant cardiologist at Southend Hospital and I have two sons. I enjoy sports, especially tennis, and was the university ladies tennis champion for four consecutive years. I am an avid gardener and enjoy travelling.