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Dr Nikolaos Diamantis

Verified Oncology London

Dr Nikolaos Diamantis

15 years of experience 5.0 (13 verified reviews)

6,032+
Patients seen
15
Years in practice
10
Publications
1
Languages spoken

PROFILE SUMMARY

About Dr Nikolaos Diamantis at a glance

Dr Nikolaos Diamantis is an Oncology practitioner based in London, United Kingdom, practising at Universitat de Barcelona Teaching Hospital. They have 22+ years of clinical experience. Procedures focus on gp consultation, annual physical exam, vaccination administration, minor procedure (skin). Educated at Universitat de Barcelona (MD, 2007). Serves patients in London, United Kingdom and the surrounding area.

About

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

— Dr Nikolaos Diamantis

Education & training

  1. 2001–2007 MD · Medicine and Surgery
    Universitat de Barcelona, London (GB)
  2. 2007–2011 Residency · Oncology
    Universidad de Navarra, London (GB)

Career & appointments

  1. 2011-09–2012-08 Junior consultant
    Universitat de Barcelona Teaching Hospital — Oncology

Licenses & insurance

Medical licenses

GB — Organización Médica Colegial de España (OMC)
#GB-904450 active · expires 2028-12-31

Board certifications

European Board of Oncology
#EB-D4019685 · issued 2012 · renewal 2022
Malpractice insurance: Allianz Professional · 3,000,000 EUR coverage · No claims on file

Procedures performed

ProcedureCodeLifetime count
GP consultation 99213 62
Annual physical exam 99395 1,056
Vaccination administration 90471 944
Minor procedure (skin) 17110 1,039

Services & pricing

ServiceDurationModalityPrice
New patient consultation (60m) 60 min in_clinic|telemed 180.00 EUR
Follow-up consultation (30m) 30 min in_clinic|telemed|phone 90.00 EUR
Vaccination administration 120 min in_clinic 810.00 EUR
Minor procedure (skin) 30 min in_clinic 540.00 EUR

Office, team & in practice

Nikolaos Diamantis
HEADSHOT
Nikolaos Diamantis in consultation
IN OFFICE
Nikolaos Diamantis with the team
WITH TEAM
Nikolaos Diamantis at a conference
CONFERENCE

Videos

introduction · 107s
Meet Nikolaos Diamantis

Research & publications

h-index: 17 · i10: 10

  1. Validation of clinical scoring in Oncology
    Nikolaos Diamantis, et al. · European Journal of Medicine, 2026
    DOI: 10.2854/euroclin.2026.0 · PMID: 32357620 · cited by 182
  2. Long-term follow-up of Oncology across GB
    Nikolaos Diamantis, et al. · European Journal of Medicine, 2025
    DOI: 10.9648/euroclin.2025.1 · PMID: 38105539 · cited by 36

Invited talks

  • Practical updates in Oncology European Annual Congress (Oncology) · Vienna · 2024 · invited
  • Single-centre experience in Oncology National Society Meeting · London · 2023 · oral abstract

Awards & memberships

Awards

  • 🏆 Top-rated Oncology — London · EuroClinics Patient Choice · 2025 · regional
  • 🏆 Excellence in Patient Care · National Society · 2024 · national

Society memberships

  • WONCA Europe — Family Doctors — Member · Since 2012
  • national college of family doctors — Member · Since 2012
  • European Union of Medical Specialists (UEMS) — Member · Since 2012

Articles by this doctor

  • Patient education Patient guide to Oncology
  • Awareness When should you see a oncology?

For international patients

Coordinator
Patient liaison · nikolaos.diamantis@euroclinics.example
Accepted international insurance
Allianz Worldwide · AXA Global · BUPA Global · Cigna Global

Location

1 tag

Patient reviews

13 verified reviews
4.95
★★★★⯨
13 reviews
5★ 2
4★ 1
3★ 0
2★ 0
1★ 0
Bedside Manner
5.0
Knowledge
5.0
Wait Time
4.7
Staff Friendliness
5.0
Ease Of Appointment
4.9
Value For Money
4.9
Would Recommend Pct
98.0
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Recent reviews

  • ★★★★★ ✓ Verified
    Very thorough first visit — explained every step. Booking was easy and the staff were welcoming.
    Anna B.
  • ★★★★★ ✓ Verified
    Took time to listen and reviewed all my previous results. I would absolutely recommend.
    Marco V.
  • ★★★★☆ ✓ Verified
    Professional and knowledgeable. Wait on the day was a bit long, otherwise excellent.
    Helena F.

SPECIALTIES & PROCEDURES

Dr Nikolaos Diamantis's Areas of Specialty

Each specialty below reflects the conditions and procedures Dr Nikolaos Diamantis treats, with the size of the national pool of United Kingdom doctors offering the same care.

Oncology

Cancer diagnosis and treatment including chemotherapy, immunotherapy, targeted therapy and survivorship care.

Dr Nikolaos Diamantis is one of 791 oncology doctors indexed in United Kingdom. Browse oncology doctors in United Kingdom →

LOCAL CARE CONTEXT

Why local healthcare in London matters

Medical practice in United Kingdom is governed by country-specific licensing, professional standards, and patient-safety regulations. Practitioners listed here are registered with the relevant United Kingdom medical authority and operate within national rules on scope of practice, prescribing rights, and continuing professional development. Care delivered in London carries the additional benefits of local language support, in-person follow-up, and direct coordination with regional hospitals and labs. A verified profile means EuroClinics has cross-checked the practitioner or clinic against an official source (national medical register, public licence database, or the practitioner themselves), and that the data shown here matches that source as of the last verification date above.

Looking for additional providers? all doctors in London or all doctors in United Kingdom.

Frequently asked questions

Quick answers to the questions patients ask most. The same answers are surfaced to AI assistants via structured data.

  • What does Nikolaos Diamantis specialise in?

    Nikolaos Diamantis specialises in Oncology in London, GB. 22 years of clinical experience.

  • What conditions does Nikolaos Diamantis treat?

    Nikolaos Diamantis treats conditions within Oncology. View the full conditions-treated list on the profile.

  • Where does Nikolaos Diamantis practise?

    Nikolaos Diamantis practises in London, GB. The profile page lists all practice addresses, phone numbers, and clinic affiliations.

  • What languages does Nikolaos Diamantis speak?

    Nikolaos Diamantis speaks English.

  • How do I book an appointment with Nikolaos Diamantis?

    Use the "Request a booking" button on the profile to send an appointment request. Most appointments are confirmed within 24 hours; many slots are bookable instantly.

  • What do patients say about Nikolaos Diamantis?

    Nikolaos Diamantis has a verified rating of 4.95/5 from 13 patient reviews. Read the most recent reviews on the profile page.

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