MD, MRCP, PhD
22 years of experience
London, NW8 7JA
(+3 more)
11 connections in healthcare
Skill endorsed
by Dr Dionysis Papadatos-Pastos, Professor Bijendra Patel and 1 other professional
22 years of experience
London, NW8 7JA
(+3 more)
11 connections in healthcare
Skill endorsed
by Dr Dionysis Papadatos-Pastos, Professor Bijendra Patel and 1 other professional
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Dr Nikos Diamantis is a Medical Oncology Consultant at St Bartholomew's Hospital specialising in colorectal, oesphageal, gastric, pancreatic, liver and bile duct cancers, and cancers of unknown primary. He is the Barts Trust Lead for Acute Oncology and Cancer of Uknowon Primay.
Dr Diamantis underwent specialist training at the Imperial College Healthcare Hammersmith, St Mary's and Harefield Hospitals. He was awarded the Greek national Oncology fellowship scholarship and went on to conduct clinical research for 2 years at the Drug Development Unit of the Royal Marsden.
Research interests include immunotherapy for GI malignancies and first in human clinical trials. Dr Diamantis is a Principal Investigator for a number of Phase 2 and 3 trials.
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General Medical Council
No. 7013255
University of Athens
Medicine
Graduated 2004
MRCP (UK) Medical Oncology 2015
Medical Oncology Board Exams 2015
ESMO Medical Oncology Certificate 2014
MRCP (London, UK) 2012
PhD with Honors - University of Athens 2010
MD - Ptychio Iatrikes with merit, National and Kapoditstrian University of Athens, Greece, 2004
New appointment
£350Follow-up appointment
£25015-17 Lodge Road, London, United Kingdom, NW8 7JA
8A Wellington Place, St Johns Wood, London, United Kingdom, NW8 9LE
35 Weymouth Street, London, United Kingdom, W1G 8BJ
164-178 Cromwell Rd, London, United Kingdom, SW5 0TU
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My husband and I saw Dr Diamantis to ask about getting treatment for my husband's esophagal cancer. since we have only recently arrived in England andhave no previous Sevious experieance of the National Health Service. this was proving difficult. Dr Diamanatis was quick to understand our difficulty, ofered reassuring advice, and promised to f=give us such help as he could to access the system. We are most grateful and hope for the best.
Having a consultation on Monday the process from everyone has been highly efficient from initial enquiry through to booking
I received exceptional care from Dr. Diamantis, among others, in my recent inpatient visit
Dr Diamantis is caring, approachable, and highly knowledgeable. You feel safe in his care and appreciate that he takes the time to thoroughly explain treatment plans ensuring that you fully understand what is proposed. He is happy to answer all your questions and you don’t feel rushed. You are in good hands which brings immense comfort during highly stressful cancer treatments. I highly recommend him.
We have been under the care of Dr. Diamantis for colorectal cancer with liver metastasis and cannot recommend him highly enough. From our very first meeting, he has been warm and reassuring during a frightening time. He truly listens, taking our wishes into account at every stage of treatment rather than simply dictating a plan. He explains complex medical details carefully and clearly, never making us feel rushed. Above all, his clinical expertise is exceptional. We must also mention his secretary who has been absolutely outstanding. The value of a brilliant secretary in private healthcare is so easily underestimated, yet it makes all the difference — replying to emails promptly, booking in scans, and keeping everything running smoothly and stress-free.
Dr Diamantis is thorough, caring, friendly and extremely good at tailoring explanations (of scans, treatments etc) to my level of interest and understanding. He is generous with his limited time and very thoughtful when it comes to planning treatment around other life events.
Dr Diamantis was the perfect choice for us. We wanted a second opinion and he listened well, was very knowledgable and gave clear answers and direction. He had a very human approach and we felt comfortable to ask everything we needed. We left the consultation more confident about the upcoming treatement and the decisions we made.
Very nice and excellent doctor. Explains everything clearly.
Nikos is a valued colleague and a knowledgeable clinician to whom I confidently refer patients.
19 Jun 2025
Dr Dionysis Papadatos-Pastos
OncologistDr Nikolaos Diamantis is an outstanding oncologist whose clinical expertise and compassionate care make a real difference to his patients. He combines scientific precision with genuine empathy and professionalism.
22 May 2025
Professor Bijendra Patel
General Surgeon
Mr Yazan Masannat
Breast SurgeonWhat are Dr Nikolaos Diamantis's reviews like?
Dr Nikolaos Diamantis's overall patient rating is 4.97 out of 5 stars on Doctify. This is based on 20 reviews.
What languages does Dr Nikolaos Diamantis speak?
Dr Nikolaos Diamantis speaks English
Where is Dr Nikolaos Diamantis located?
Dr Nikolaos Diamantis primarily practices at HCA Healthcare UK The Wellington Hospital Outpatients, located at 15-17 Lodge Road, London, United Kingdom, NW8 7JA
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What are Dr Nikolaos Diamantis working hours?
Dr Nikolaos Diamantis is working Thursday (10:00 - 12:00)
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Does Dr Nikolaos Diamantis accept new patients?
Dr Nikolaos Diamantis generally accepts new patients.
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