Skip to main content
Dr. Mary McStay

Verified Gastroenterology London

Dr. Mary McStay

12 years of experience 5.0 (49 verified reviews)

11,744+
Patients seen
12
Years in practice
7
Publications
1
Languages spoken

PROFILE SUMMARY

About Dr. Mary McStay at a glance

Dr. Mary McStay is a Gastroenterology practitioner based in London, United Kingdom, practising at Universitat de València Teaching Hospital. They have 32+ years of clinical experience. Procedures focus on gp consultation, annual physical exam, vaccination administration, minor procedure (skin). Educated at Universitat de València (MD, 2010). Serves patients in London, United Kingdom and the surrounding area.

About

Dr Mary McStay is a Consultant Gastroenterologist specialising in endoscopy, inflammatory bowel disease, irritable bowel syndrome and neuroendocrine tumours based in Essex. She currently sees patients at Colchester General Hospital and private patients at Ramsay Oaks Hospital, Colchester.

Dr McStay completed her preclinical medical training at Cambridge University as well as her Honours degree in Pharmacology in 1991. She completed her undergraduate medical training at St Bartholomew's Hospital Medical School, London in 1994. Dr McStay did her specialist training in Gastroenterology in the North East Thames region and spent two years in full time research at the Neuroendocrine Tumour Unit at the Royal Free Hospital. She was awarded her research doctorate of medicine degree for her work by University College London in 2007.

Dr McStay has clinical expertise in all areas of gastroenterology. She has leads the small bowel and colon capsule service at Colchester Hospital and the Neuroendocrine Tumour service at ESNEFT. She is also a bowel cancer screening colonoscopist. She is principal investigator in a number of clinical trials and East of England representative for the British Society of Gastroenterology Clinical Service Standards Committee.

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

— Dr. Mary McStay

Education & training

  1. 2004–2010 MD · Medicine and Surgery
    Universitat de València, London (GB)
  2. 2010–2014 Residency · Gastroenterology
    Universitat de Barcelona, London (GB)

Career & appointments

  1. 2014-09–2015-08 Junior consultant
    Universitat de València Teaching Hospital — Gastroenterology

Licenses & insurance

Medical licenses

GB — Organización Médica Colegial de España (OMC)
#GB-585175 active · expires 2028-12-31

Board certifications

European Board of Gastroenterology
#EB-9097D280 · issued 2015 · renewal 2025
Malpractice insurance: HDI Global · 2,000,000 EUR coverage · No claims on file

Procedures performed

ProcedureCodeLifetime count
GP consultation 99213 251
Annual physical exam 99395 517
Vaccination administration 90471 2,213
Minor procedure (skin) 17110 2,802

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 60 min in_clinic 180.00 EUR
Minor procedure (skin) 90 min in_clinic 450.00 EUR

Office, team & in practice

Mary McStay
HEADSHOT
Mary McStay in consultation
IN OFFICE
Mary McStay with the team
WITH TEAM
Mary McStay at a conference
CONFERENCE

Videos

introduction · 127s
Meet Mary McStay

Research & publications

h-index: 6 · i10: 5

  1. Long-term follow-up of Gastroenterology across GB
    Mary McStay, et al. · European Journal of Medicine, 2026
    DOI: 10.2161/euroclin.2026.0 · PMID: 39603473 · cited by 99
  2. Validation of clinical scoring in Gastroenterology
    Mary McStay, et al. · European Journal of Medicine, 2025
    DOI: 10.1239/euroclin.2025.1 · PMID: 36345527 · cited by 49
  3. Long-term follow-up of Gastroenterology across GB
    Mary McStay, et al. · European Journal of Medicine, 2024
    DOI: 10.9174/euroclin.2024.2 · PMID: 31749252 · cited by 143

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
  • 🏆 Excellence in Patient Care · National Society · 2024 · national
  • 🏆 Young Investigator Award · European Society · 2023 · international

Society memberships

  • WONCA Europe — Family Doctors — Member · Since 2015
  • national college of family doctors — Member · Since 2015
  • European Union of Medical Specialists (UEMS) — Member · Since 2015

Articles by this doctor

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

For international patients

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

Location

1 tag

Patient reviews

49 verified reviews
4.96
★★★★⯨
49 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
Share your experience — help other patients find the right doctor. Write a review →
20 – 4,000 characters

Submissions are moderated and may take 24-72 h to appear publicly. Identifying patient information should not be included.

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. Mary McStay's Areas of Specialty

Each specialty below reflects the conditions and procedures Dr. Mary McStay 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.

Dr. Mary McStay 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 Mary McStay specialise in?

    Mary McStay specialises in Gastroenterology in London, GB. 32 years of clinical experience.

  • What conditions does Mary McStay treat?

    Mary McStay treats conditions within Gastroenterology. View the full conditions-treated list on the profile.

  • Where does Mary McStay practise?

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

  • What languages does Mary McStay speak?

    Mary McStay speaks English.

  • How do I book an appointment with Mary McStay?

    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 Mary McStay?

    Mary McStay has a verified rating of 4.96/5 from 49 patient reviews. Read the most recent reviews on the profile page.

Similar specialists

Browse all →