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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
Dr Nick Maisey is a Consultant Oncologist treating GI cancers, stomach cancer, liver and bile duct cancer, pancreatic cancer, gall bladder cancer, and bowel cancer.

Specialties and sub-specialties

Colorectal cancer & Carcinoma of Unknown Primary -
Gastro-Intestional Stroma Tumour

Further information



Islam Channel: The Health Show
Dr Maisey is a guest on The Health Show, discussing the treatment of stomach cancer.

Watch a video of the programme


Q&A: Dr Nick Maisey
Dr Maisey's interview with the Marylebone Journal discusses treatments for a gastrointestinal stromal tumour (GIST), and the impact of new drugs.

Read Dr Maisey's interview

Professional profile

Dr Maisey is a Consultant Medical Oncologist at Guys and St Thomas’ NHS Foundation Trust.

He chairs the Guys and St Thomas’ Upper GI Multidisciplinary team, is a core member of the carcinoma of unknown primary team at Guys and St Thomas’ and has been instrumental in developing the service of treatments and pathways for this rare cancer.

After qualifying in 1993 from Guys and St Thomas’ Hospital, he became a member of the Royal College of Physicians in 1997.

He completed his specialist training in medical oncology at the Royal Marsden Hospital. In 2002 he was awarded an MD thesis for his work on early response markers in cancer.

Dr Maisey is involved in cancer drug development and has been a principal investigator on a number of national clinical trials as well as commercial studies. He has held a number of key roles including vice chair of the upper gastrointestinal tumour working group and medical director for the South East London Cancer Network.

He has published several peer-reviewed papers and presented at a number of national and international meetings.

Clinical interests

  • Treatment of gastroinstestional cancers including bile duct
  • Bowel
  • Gall bladder
  • GIST
  • Liver
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  • Oesophagus
  • Pancreas
  • Stomach
  • Cancers of unknown primary
  • Cancer drug therapies
show less

Current posts

  • Consultant Medical Oncologist
    Guy’s and St Thomas’ NHS Foundation Trust


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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