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Mr Trystan LewisConsultant General and Upper GI Surgeon in Ashtead
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Mr Trystan Lewis

Consultant General and Upper GI Surgeon in Ashtead, London and W1G Marylebone London

MBBS BSc FRCS PhD
GMC: 6130166

5.039reviewsReview

Expert in:
Gallbladder surgery
Laparoscopic hernia surgery
Upper GI surgery
Hernia
Gallstones
Abdominal pain
  • Information
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  • Reviews
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Professional statement

Mr Trystan Lewis is a leading consultant general and upper gastrointestinal surgeon who is an expert when it comes to gallbladder surgery, gallstones, hernia surgery, keyhole (minimally invasive) surgery, abdominal pain, and acid reflux, but to mention a few. He currently practises at both the Ashtead Hospital in Ashtead and Spire St. Anthony's Hospital in London.


After completing both his BSc (2004) and MBBS (2005) at the esteemed Imperial College London, Mr Lewis went on to undertake his specialist training throughout the North West Thames area, before successfully completing his higher surgical training in South West Thames. He would then obtain a PhD in surgical innovation in 2013 from the previously mentioned Imperial College London.


Mr Lewis, who is the current Epsom and St Helier University Hospitals NHS Trust lead of the surgical ambulatory care unit, is a trusted, experienced, and highly skilled surgeon when tasked with performing elective and emergency abdominal surgery. He has, to-date, published an extensive number of peer-reviewed articles in various surgical journals, and has also impressively presented his work throughout Europe as well as North America. Mr Lewis is an extremely passionate trainer for the new generation of surgeons coming through. 

Clinics

Ashtead Hospital
  • Ashtead Hospital profile image

    Ashtead Hospital

    Ashtead, The Warren, Ashtead, KT21 2SB

    Medical insurances accepted

    I'm paying for myself
    Bupa
    AXA
    AVIVA
    Cigna
    WPA
    Simply Health
    Allianz

Credentials

Professional experience

  • 21 years of experience
  • Consultant Surgeon, Epsom and St Helier University Hospitals NHS Trust (2020 - present)
  • London Deanery Specialist Registrar, The London Deanery (2012 - 2019)
  • Clinical Research Fellow, Imperial College London (2008 - 2012)
View more

Subspecialties

  • Lipoma removal
  • Skin lesion treatments
  • Fundoplication
  • Abdominal wall reconstruction
  • Pilonidal sinus excision
  • abdominal wall reconstruction
View more

Professional memberships

  • General Medical Council (GMC)
  • British Obesity and Metabolic Surgery Society (BOMSS)
  • Association of Upper Gastro-Intestinal Surgeons (AUGIS)
  • Royal College of Surgeons (FRCS)
View more

Education

  • BSc, Imperial College London (2004)
  • MBBS, Imperial College London (2005)
  • PhD, Imperial College London (2013)
View more

Positions in organisations

  • Clinical Lead, Surgical Ambulatory Care Unit, Epsom and St Helier NHS Trust 
  • College Tutor for Surgery, Epsom and St. Helier NHS Trust

Publications and conferences

  • You can see Mr Lewis' publications on ResearchGate. 

Languages spoken

  • English
Registration number: 6130166

Reviews

All reviews are from real patients and have been verified by our Customer Service department to ensure they meet our guidelines. Rules of the service

39 reviews

5.0

Review this doctor
  • Would you recommend this doctor?
  • Treatment of the doctor
  • Treatment of the staff
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  • Felt very confident with Mr. Trystan Lewis, everything explained perfectly and very happy with the results of my operation.
    16 May 2025

    R.D.

    Verified patient
  • Mr Lewis was excellent in all regards. I found him to be extremely approachable and have a lovely manner. I felt very confident about him performing the surgery
    24 April 2025

    H.R.

    Verified patient
  • Treatment was excellent from start to finish
    16 April 2025

    J.F.

    Verified patient
  • I am very pleased with the results of my operation and the after care.
    14 March 2025

    S.D.

    Verified patient
  • I am very pleased with the results of my operation and the after care.
    14 March 2025

    S.D.

    Verified patient
  • Mr Lewis treated me with compassion, caring and a full understanding of my unusual circumstances. A problem arose (not his doing) and he solved it within hours.
    13 March 2025

    R.F.

    Verified patient
  • 12 March 2025

    J.O.

    Verified patient
  • Completely satisfied with the whole process.
    10 March 2025

    A.H.

    Verified patient
  • Incredible experience with Dr. Lewis and would highly recommend.
    5 March 2025

    M.S.

    Verified patient
  • Mr Lewis impressed as a professional with good people skills. I would recommend
    22 January 2025

    R.A.

    Verified patient
View all reviews

Treatments

The doctor is expert in

Abdominal pain

Gallbladder surgery

Gallstones

Hernia

Laparoscopic hernia surgery

Upper GI surgery

The doctor also specialises in:

Abdominal wall reconstruction

Acellular dermal matrix (ADM)

Acid reflux

Bariatric surgery

Benign breast lumps

Cholecystectomy

Duodenal switch

Endolaser

Endovenous laser treatment (EVLA)

Epigastric hernia

Frequently Asked Questions

What is Mr Trystan Lewis's specialty?

Mr Trystan Lewis is a consultant specialising in Surgery, with extensive experience in assessing and treating patients within this field.

Which conditions and treatments does Mr Trystan Lewis specialise in?

Mr Trystan Lewis is a surgeon who provides assessment and treatment for Gallstones, Abdominal pain, Gallbladder surgery, Hernia, Upper GI surgery and Laparoscopic hernia surgery. During your consultation, you will be informed of the most suitable options following a personalised evaluation.

How many years of experience does Mr Trystan Lewis have?

Mr Trystan Lewis has 21 years of professional experience as a consultant surgeon, providing specialist assessment and treatment in this medical field.

What do patients say about Mr Trystan Lewis?

Patients give a rating of 5.0 out of 5 to Mr Trystan Lewis, a score considered excellent. This average is based on 39 verified patient reviews, reflecting the experience of those who have attended an appointment.

Are Mr Trystan Lewis's reviews verified?

Yes. All Mr Trystan Lewis's reviews come from verified patients who have attended either an in-person or an e-Consultation appointment. We use a system that ensures authenticity and prevents fake reviews. Some profiles may also display reviews from other platforms, which follow their own verification policies, with the source always clearly indicated.

Where does Mr Trystan Lewis practise?

Mr Trystan Lewis practices in the following locations:

  • Ashtead at The Warren, Ashtead
  • London at 801 London Rd, Cheam, Worcester Park, Sutton
  • W1G Marylebone London at 1 Welbeck St, London, W1G 0AR

In-person consultations are available at these locations as a Surgery.

How can I book an appointment with Mr Trystan Lewis?

You can book an appointment with Mr Trystan Lewis directly from this page by selecting the time that suits you best. Alternatively, you can call the phone number shown if you prefer personalised assistance.

Does Mr Trystan Lewis see NHS patients?

Many specialists featured on Top Doctors also hold NHS positions. However, appointments arranged for Mr Trystan Lewis through this platform are private, either self-pay or covered by private medical insurance.

Does Mr Trystan Lewis offer private appointments?

Yes, Mr Trystan Lewis offers private appointments for patients seeking flexible and direct access to a consultant surgeon.

Does Mr Trystan Lewis offer online consultations?

Yes, Mr Trystan Lewis offers online consultations. You can book an appointment directly from this page by selecting the date and time that suit you best. Personalised assistance is also available by calling the number displayed on this page.

Does Mr Trystan Lewis accept insurance?

Mr Trystan Lewis works with the following private medical insurance providers: Bupa, AXA, AVIVA, Cigna, WPA, Simply Health, Allianz, CS Healthcare, Vitality, The Exeter Friendly, Pru Health, Groupama, April, Freedom, National Assurance, General Medical, Saga, Healix, Legal & General Insurance, Health-online, Benenden Health , Alliance Health Group, Police Mutual, Aetna, Tricare, Asia Medical Assistance, AIG, Health Now, Humanis, International SOS, Standard Life and Bupa Global. If your insurer is not listed, you may contact the practice directly to confirm your coverage.

What is Mr Trystan Lewis's availability?

Mr Trystan Lewis's availability depends on the appointment slots open at any given time. On this page, you can check current availability, and if no slots are shown, you can request an appointment or contact the practice directly.

What payment methods does Mr Trystan Lewis offer?

You can pay for your consultation with Mr Trystan Lewis using the following methods: Self-paying or Prepaid.

What languages does Mr Trystan Lewis speak?

Mr Trystan Lewis is a surgeon who offers consultations in English.

How is Mr Trystan Lewis selected to appear on this platform?

All doctors listed on Top Doctors, including Mr Trystan Lewis, undergo our rigorous selection process. Only one in five specialists meets the required standards to be included.
Discover Top Doctors' rigorous medical selection process.
The doctor, or where applicable the hospital or medical centre in which the doctor provides services, undertakes to keep the information relating to the prices of services published on their profile on the Top Doctors platform up to date at all times, ensuring that such prices correspond to those effectively charged to patients. In the event of any discrepancy between the published price and the price ultimately charged to the patient, the doctor and/or the relevant hospital or medical centre shall be solely liable towards the patient and towards Top Doctors for any claim or financial difference arising therefrom.

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Ashtead HospitalAshtead, The Warren, Ashtead, KT21 2SB
Payment methodSelf-paying
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