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Professor Siwan Thomas-Gibson

Gastroenterology London

Professor Siwan Thomas-Gibson

14 years of experience

10,199+
Patients seen
14
Years in practice
5
Publications
1
Languages spoken

PROFILE SUMMARY

About Professor Siwan Thomas-Gibson at a glance

Professor Siwan Thomas-Gibson is a Gastroenterology practitioner based in London, United Kingdom, practising at UAB Barcelona Teaching Hospital. They have 34+ years of clinical experience. Procedures focus on gp consultation, annual physical exam, vaccination administration, minor procedure (skin). Educated at UAB Barcelona (MD, 2008). Serves patients in London, United Kingdom and the surrounding area.

About

Professor Siwan Thomas-Gibson is a leading expert in the field of gastrointestinal medicine, specialising in high-quality colonoscopy procedures and early colorectal neoplasia management. Accredited as a bowel cancer screening colonoscopist since 2007, she prioritises patient care. Her expertise encompasses various gastrointestinal conditions, including inflammatory bowel disease, irritable bowel syndrome, indigestion, and post-cancer treatment bowel symptoms, employing evidence-based approaches to diagnosis and treatment.
Recognised with the prestigious British Society of Gastroenterology Hopkins prize in 2018, Professor Thomas-Gibson has spearheaded initiatives to enhance safety and standards in endoscopy. An esteemed educator, she frequently contributes to national and international platforms. Appointed as a Chair at Imperial College London in 2020, she continues to make significant contributions to gastroenterological care, research, and education.

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

— Professor Siwan Thomas-Gibson

Education & training

  1. 2002–2008 MD · Medicine and Surgery
    UAB Barcelona, London (GB)
  2. 2008–2012 Residency · Gastroenterology
    Universidad de Navarra, London (GB)

Career & appointments

  1. 2012-09–2013-08 Junior consultant
    UAB Barcelona Teaching Hospital — Gastroenterology

Licenses & insurance

Medical licenses

GB — Organización Médica Colegial de España (OMC)
#GB-743909 active · expires 2028-12-31

Board certifications

European Board of Gastroenterology
#EB-A1BA5C23 · issued 2013 · renewal 2023
Malpractice insurance: Generali Healthcare · 2,000,000 EUR coverage · No claims on file

Procedures performed

ProcedureCodeLifetime count
GP consultation 99213 258
Annual physical exam 99395 1,964
Vaccination administration 90471 2,460
Minor procedure (skin) 17110 275

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 30 min in_clinic 360.00 EUR
Minor procedure (skin) 120 min in_clinic 270.00 EUR

Office, team & in practice

Siwan Thomas-Gibson
HEADSHOT
Siwan Thomas-Gibson in consultation
IN OFFICE
Siwan Thomas-Gibson with the team
WITH TEAM
Siwan Thomas-Gibson at a conference
CONFERENCE

Videos

introduction · 132s
Meet Siwan Thomas-Gibson

Research & publications

h-index: 18 · i10: 6

  1. Validation of clinical scoring in Gastroenterology
    Siwan Thomas-Gibson, et al. · European Journal of Medicine, 2026
    DOI: 10.2254/euroclin.2026.0 · PMID: 33429690 · cited by 34
  2. Long-term follow-up of Gastroenterology across GB
    Siwan Thomas-Gibson, et al. · European Journal of Medicine, 2025
    DOI: 10.7950/euroclin.2025.1 · PMID: 32135268 · cited by 136

Invited talks

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

Awards & memberships

Awards

  • 🏆 Top-rated Gastroenterology — London · EuroClinics Patient Choice · 2025 · regional

Society memberships

  • WONCA Europe — Family Doctors — Member · Since 2013
  • national college of family doctors — Member · Since 2013
  • European Union of Medical Specialists (UEMS) — Member · Since 2013

Articles by this doctor

  • Patient education Patient guide to Gastroenterology
  • Awareness When should you see a gastroenterology?

For international patients

Coordinator
Patient liaison · dr.siwan.thomas.gibson@euroclinics.example

Location

1 tag

Patient reviews

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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

Professor Siwan Thomas-Gibson's Areas of Specialty

Each specialty below reflects the conditions and procedures Professor Siwan Thomas-Gibson treats, with the size of the national pool of United Kingdom doctors offering the same care.

Gastroenterology

Digestive-tract conditions including reflux, IBS, IBD, liver disease and colorectal screening.

Professor Siwan Thomas-Gibson is one of 792 gastroenterology doctors indexed in United Kingdom. Browse gastroenterology 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 Siwan Thomas-Gibson specialise in?

    Siwan Thomas-Gibson specialises in Gastroenterology in London, GB. 34 years of clinical experience.

  • What conditions does Siwan Thomas-Gibson treat?

    Siwan Thomas-Gibson treats conditions within Gastroenterology. View the full conditions-treated list on the profile.

  • Where does Siwan Thomas-Gibson practise?

    Siwan Thomas-Gibson practises in London, GB. The profile page lists all practice addresses, phone numbers, and clinic affiliations.

  • What languages does Siwan Thomas-Gibson speak?

    Siwan Thomas-Gibson speaks English.

  • How do I book an appointment with Siwan Thomas-Gibson?

    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.

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