MBBS BSc MRCP
Live bookings available
26 years of experience
London, SE1 2PR
(+6 more)
64 connections in healthcare
Skill endorsed
by Dr. Sarmad Mushtaq, Dr Khaleel Jamil and 31 other professionals
Live bookings available
26 years of experience
London, SE1 2PR
(+6 more)
64 connections in healthcare
Skill endorsed
by Dr. Sarmad Mushtaq, Dr Khaleel Jamil and 31 other professionals
Areas of expertise
Contact
Book online
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.
Core Clinical Focus:
Symptoms & General Gastroenterology:
Procedures & Endoscopy:
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General Medical Council
No. 4742373
Royal College of Physicians
No. 110563
University of London
Medicine
Graduated 2000
Qualifications:
MBBS Guy's, King's & St Thomas' School of Medicine,
King's College London 2000
MRCP U.K Royal College of Physicians 2003
BSc King's College London 1997
Additional training:
Clinical fellow in endoscopy Guy's and St Thomas' Hospitals,
London 2007
Clinical fellow in inflammatory bowel disease Guy's and St
Thomas' Hospitals, London 2008
Professional bodies:
MRCP Royal College of Physicians 2003
Details of entry to
specialist register:
Certification of completion of training, 2010
Affiliations /
memberships:
British Medical Association
British Society of Gastroenterology
Read publications and papers written by this specialist.
25 / 06 / 2013
Pharmacogenetic variants in the DPYD, TYMS, CDA and MTHFR genes are clinically significant predictors of fluoropyrimidine toxicity
Published in British Journal of Cancer
01 / 10 / 2021
Relationship Between Thiopurine S-Methyltransferase Genotype/Phenotype and 6-Thioguanine Nucleotide Levels in 316 Patients With Inflammatory Bowel Disease on 6-Thioguanine - PubMed
Published in Therapeutic Drug Monitoring
03 / 11 / 2014
The role of faecal calprotectin in the differentiation of organic from functional bowel disorders - PubMed
Published in British Journal of General Practice
New appointment
£280Follow-up appointment
£20027 Tooley Street, London, United Kingdom, SE1 2PR
St Thomas Street, London, United Kingdom, SE1 9BS
40-42 Lee Terrace, London, United Kingdom, SE3 9UD
3 New Mill Road, Orpington, United Kingdom, BR5 3TW
1 West Ferry Circus, Canary Wharf, London, United Kingdom, E14 4HD
40 Bank Street, London, United Kingdom, E14 5NR
3 New Mill Road, Crayfields Business Park, Orpington, United Kingdom, BR5 3TW
Areas of expertise
Contact
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This summary was created by AI based on recent reviews
Dr Aathavan Loganayagam offers kind, professional, and reassuring patient interactions. He performs colonoscopy and gastroscopy procedures with great skill, and his clear explanations lead to a comfortable experience with no discomfort. Patients praise his accurate diagnosis for complex gastrointestinal problems, resolving long-standing symptoms. His care addresses common issues, including irritable bowel syndrome, abdominal pain, and bloating.
Dr Loganayagam has been absolutely fantastic throughout my multiple consultations and procedures. During my initial appointment, his calm and reassuring demeanour straight away put me at ease. He has also performed a few procedures for me, all of which were conducted with the highest level of expertise and care. I highly recommend him.
Dr Loganayagam is an excellent practitioner who provides a fantastic quality of care. His diagnostic knowledge is outstanding, and he immediately puts you at ease. I would highly recommend him to anyone who requires his services.
An amazing doctor with great bedside manner. His team were kind and attentive. The colonoscopy was great and with minimal discomfort. I felt I was very well looked after. Thank you!
The quality of treatment and care given by Dr Loganayagam was exemplary. His communication skills were outstanding, I felt I was in the best of hands.
Dr Loganayagam is compassionate, pleasantly straightforward, and completely trustworthy. I felt entirely at ease during my colonoscopy. His team was incredibly friendly and supportive, ensuring the procedure was carried out efficiently. After identifying and resecting several polyps, Dr Loganayagam clearly explained his findings during our follow-up call. I never felt hurried or confused. I highly recommend him to family and friends, and I am deeply grateful to him and his team for their exceptional care.
Dr Loganayagam truly put me at ease and listened attentively to everything I needed to share. He was exceptionally thorough and never jumped to conclusions—a refreshing contrast to the frustrating experiences I have frequently encountered elsewhere.
I found Dr Loganayagam to be highly professional, yet warm and approachable. The colonoscopy was an incredibly interesting experience, and I learned a great deal throughout. Dr Loganayagam is exceptionally knowledgeable and was more than happy to share insights and explain the findings in real time during the procedure.
Dr Loganayagam is exceptionally generous with his time, ensuring I completely understood every aspect of the procedure beforehand. He is clearly a leader in his field, combining top-tier clinical expertise with a patient-centred approach.
I am so grateful to the family member who strongly recommended Dr Loganayagam. He is highly qualified, charming, and has a reassuring bedside manner. He took the time to explain the procedure step-by-step, including which parts might feel slightly uncomfortable. This transparency allowed me to relax completely. I opted out of sedation, and the 15-minute procedure turned out to be entirely painless and free of any real discomfort.
As a fellow physician navigating severe health anxiety, I found Dr Loganayagam’s communication skills to be absolutely second to none. He delivers information directly, speaks at a measured pace that allows for processing, and avoids vague euphemisms. Thanks to his approach, I knew exactly what was happening and what he found at every stage. He has set a benchmark that I hope to emulate in my own medical practice.
Excellent physician and gastroenterologist. Highly recommended.
04 Jul 2026
Dr. Sarmad Mushtaq
Respiratory DoctorExcellent and knowledgeable
14 May 2026
Dr Khaleel Jamil
GastroenterologistFantastic collegue. Superb clinician.
13 May 2026
Dr Azhar Ansari
GastroenterologistI have had the pleasure of working alongside Aathy for a number of years, and his clinical acumen in gastroenterology is matched only by his collegiality. He is a thoughtful, thorough clinician who consistently puts his patients first. He is exactly the kind of consultant colleague every surgeon hopes to have. His patients are in exceptionally good hands.
15 Apr 2026
Mr Paolo Sorelli
General Surgeon
Explore videos from Dr Aathavan Loganayagam explaining process of procedures and other important things you should know before choosing your provider.

Brief summary of my practice
13 March 2026

Expert gastroenterologist Dr Aathavan Loganayagam explains the differences in the cause and symptoms of IBD and IBS. One can lead to bowel cancer if left unt...
10 February 2026
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Our expert gastroenterologist Dr Aathavan Loganayagam explains what causes IBD, discussing the triggers, symptoms and how lifestyle choices an alleviate the ...
10 February 2026
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A patient of consultant gastroenterologist Dr Aathavan Loganayagam, shares their experience of the treatment they received, how they found the whole process ...
10 February 2026
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Premier consultant gastroenterologist Dr Aathavan Loganayagam provides an expert overview of small intestinal bacterial overgrowth (SIBO).00:00 Introduction ...
30 March 2026
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What are Dr Aathavan Loganayagam's reviews like?
Dr Aathavan Loganayagam's overall patient rating is 4.98 out of 5 stars on Doctify. This is based on 578 reviews.
What languages does Dr Aathavan Loganayagam speak?
Dr Aathavan Loganayagam speaks English and Tamil
Where is Dr Aathavan Loganayagam located?
Dr Aathavan Loganayagam primarily practices at HCA Healthcare UK London Bridge Hospital, located at 27 Tooley Street, London, United Kingdom, SE1 2PR
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What are Dr Aathavan Loganayagam working hours?
Dr Aathavan Loganayagam is working Monday (14:00 - 16:00), Tuesday (13:30 - 16:30, 10:30 - 12:30, 13:30 - 15:30), Thursday (17:30 - 20:00), Friday (11:30 - 13:30, 14:30 - 16:00), Saturday (10:00 - 11:30)
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Does Dr Aathavan Loganayagam accept new patients?
Dr Aathavan Loganayagam generally accepts new patients.
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