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General enquiries:
+44 (0)207 935 4444
Book an appointment:
+44 (0)207 616 7693
Self-pay enquiry:
+44 (0)203 219 3315
The London Clinic

Specialties and sub-specialties

Interventional endoscopy
Hepatopancreaticobiliary medicine
Inflammatory bowel disease
Gastrointestinal cancer

Further information

Professional profile

Dr Thillainayagam did his higher medical training in the London Region (St Bartholomew's Hospital & St Mark's Hospital) and Oxford Region (John Radcliffe Hospital & Royal Berkshire Hospital).
His doctoral research was into the fluid therapy of acute infectious diarrhoea (MD 1995).
From his post as a Senior Registrar in Oxford he was appointed consultant & honorary senior lecturer in medicine to Hammersmith Hospitals NHS Trust and the Royal Postgraduate Medical School (now part of The Faculty of Medicine, Imperial College, University of London) in 1996.
This is now Imperial College Healthcare, the largest Trust in the UK, and the first Academic Health Sciences Centre in the UK.
He is one of the lead interventional endoscopists in the Trust, was clinical lead for Medicine on the clinical effectiveness committee of Hammersmith Hospitals Trust, leads an undergraduate teaching firm, and was very involved in co-ordinating the GI curriculum for the Faculty of Medicine of Imperial College (University of London).
Dr Thillainayagam has also been the lead clinician for cancer of the upper GI tract for the Cancer Services Collaborative (West London Cancer Network), as well as for Hammersmith Hospitals NHS Trust.
He is on the Clinical Services Committee of the BSG and is chairman of the NW Thames Gastroenterology Group.
His specialist clinical interest and expertise lie in therapeutic endoscopy, malignant disease of the digestive system, hepatopancreaticobiliary medicine, and inflammatory bowel disease.
His current research interests include cholangiocarcinoma, novel endoscopic imaging, iron deficiency anaemia, the palliation of GI cancer and bile salt malabsorption.

Clinical interests

  • Chronic diarrhoea
  • Complex functional bowel disorders
  • Iron deficiency anaemia
  • Novel endoscopic imaging

Current posts

  • Consultant Physician and Honorary Senior Lecturer
    Imperial College Healthcare

Medical training

Year qualified 1984
  • Manchester Medical School 1984

Personal interests

He likes fly fishing, theatre, music andsport.


A nurse with a patient

Facilitating acute admissions into The London Clinic whilst maintaining the highest levels of safety and care, supported by a consultant on-call rota.

Concierge service

Chauffeur loading suitcases into a luxury car

We can support our patients with travel, hotel accommodation, London tours, plus theatre and restaurant reservations.

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Main numbers

General enquiries: 020 7935 4444Appointments: 020 7616 7693Self-pay: 020 3219 3315

Other numbers

Concierge service: 020 3219 3323International office: 020 3 219 3266Invoice and payment enquiries: 020 7616 7708

Your call may be recorded for training and monitoring purposes.

Medical service numbers

Breast services appointments: 020 7616 7653 Diagnostics appointments: 020 7616 7653 Endoscopy appointments: 020 7616 7760 Eye centre appointments: 020 7616 7768 Haematology appointments: 020 7535 5503 Kidney services appointments: 020 7224 5234 Liver services appointments: 020 7616 7719 Physiotherapy appointments: 020 7616 7651 Radiology appointments: 020 7616 7653

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