Dr Aathavan Loganayagam

Dr Aathavan Loganayagam is a Consultant Gastroenterologist based in South London, providing diagnostic and therapeutic care for a broad range of gastrointestinal conditions. His clinical practice focuses on timely diagnosis and evidence-based management of complex and chronic digestive disorders. He has specialist expertise in inflammatory bowel disease, including Crohn’s disease and ulcerative colitis, as well as irritable bowel syndrome, gastro-oesophageal reflux disease and coeliac disease. He routinely assesses patients presenting with abdominal pain, bloating, dyspepsia, heartburn, altered bowel habit, diarrhoea, constipation and rectal bleeding. Dr Loganayagam is a JAG-accredited endoscopist and serves as Lead Clinician for Endoscopy at Queen Elizabeth Hospital Woolwich, part of Lewisham and Greenwich NHS Trust. He performs gastroscopy, colonoscopy and sigmoidoscopy, including advanced polypectomy, as well as video capsule endoscopy. Sedation options are tailored according to clinical indication and patient preference. He completed his medical training at Guy’s, King’s and St Thomas’ Medical School and undertook specialist gastroenterology training within the South London programme. His academic work in personalised medicine and inflammatory bowel disease at Guy’s and St Thomas’ Hospitals has been supported by research grants and recognised with an NHS Innovation London Award. Alongside clinical practice, Dr Loganayagam is involved in undergraduate and postgraduate education, contributes to MRCP examinations for the Royal College of Physicians, and writes for the European Specialty Examination in Gastroenterology and Hepatology.  Areas of interest Core Clinical Focus: • Inflammatory Bowel Disease (IBD): Crohn's Disease & Ulcerative Colitis • Irritable Bowel Syndrome (IBS) & Functional Gut Disorders (SIBO) • Gastro-oesophageal Reflux (GORD), Heartburn, Barrett's Oesophagus • Coeliac Disease, Food Intolerance & Allergy Symptoms & General Gastroenterology: • Abdominal Pain, Bloating & Wind • Altered Bowel Habit (Constipation, Diarrhoea, Loose Stools) • Indigestion (Dyspepsia) & Nausea • Rectal Bleeding & Anaemia • Swallowing Problems (Dysphagia) & Unexplained Weight Loss Procedures & Endoscopy: • Diagnostic & Therapeutic Endoscopy • Gastroscopy (OGD) & Colonoscopy • Bowel Cancer Screening & Polypectomy (Polyp Removal) • Flexible Sigmoidoscopy & Video Capsule Endoscopy • Specialist Area Management: • Gastrointestinal Cancers (Oesophageal, Stomach, Colorectal) • Liver Disease (Fatty Liver, Cirrhosis) & Pancreatitis • Gallstones, Gastritis & Peptic Ulcers

"Evidence-based care tailored to each patient — taking the time to explain options and shared decisions."

1. 2002–2008
   MD · Medicine and Surgery

   Universitat de Barcelona (GB)

2. 2008–2012
   Residency · Gastroenterology

   UAB Barcelona (GB)

3. 2012–2013
   Fellowship · Subspecialty training

   Mayo Clinic, US

1. 2012-09–2013-08
   Junior consultant

   Universitat de Barcelona Teaching Hospital — Gastroenterology

1. 1 Choose a slot
2. 2 Brief pre-consult form
3. 3 Consultation
4. 4 Follow-up note & plan

Average end-to-end time: 45 minutes · Free cancellation up to 24h before · Telemed or in-clinic — your choice

h-index: 14 · i10: 14

Selected publications

1. Outcomes of Gastroenterology in adults — a multi-centre cohort

   Dr Aathavan Loganayagam, et al. · European Journal of Medicine, 2025

   DOI: 10.1482/euroclin.2025.0 · cited by 166

2. European registry analysis of Gastroenterology outcomes

   Dr Aathavan Loganayagam, et al. · European Journal of Medicine, 2024

   DOI: 10.1851/euroclin.2024.1 · cited by 100

3. Outcomes of Gastroenterology in adults — a multi-centre cohort

   Dr Aathavan Loganayagam, et al. · European Journal of Medicine, 2023

   DOI: 10.7947/euroclin.2023.2 · cited by 74

• Patient education Patient guide to Gastroenterology 2026-03-24 · 11 min read
• Awareness When should you see a gastroenterology? 2026-01-25 · 5 min read