—ABOUT
Meet Mr Marcos
Kostalas
A surgeon driven by the belief that every patient deserves not just excellent surgical outcomes, but a experience built on trust, clarity, and genuine care.
Training & Career
A Dedicated Surgical Path
From medical school to consultant practice, every stage of training has shaped the surgeon Mr Kostalas is today.
PRESENT
Consultant General & Upper GI Surgeon
Leading a specialist upper GI surgical practice at Mount Stuart Hospital and Torbay Hospital in Devon, treating patients with hernia, gallbladder, reflux, and complex abdominal conditions.
DOCTOR OF MEDICINE
MD — University of Surrey
Awarded a doctorate for research contributing to advancements in surgical techniques, reflecting a commitment to evidence-based practice and academic excellence.
FELLOWSHIP
FRCS — Royal College of Surgeons of England
Achieved the gold-standard surgical qualification, demonstrating mastery across the full scope of general and upper gastrointestinal surgery.
SPECIALIST TRAINING
Surgical Training — South West England
Completed comprehensive higher surgical training across the South West, gaining extensive experience in open, laparoscopic, and complex upper GI procedures.
FOUNDATION
Medical Degree — University of Bristol
Graduated in medicine from one of the UK's most respected medical schools, laying the foundation for a career dedicated to surgical excellence.
BACKGROUND
Beyond the Operating Theatre
Mr Kostalas's journey into surgery was driven by a simple but powerful motivation: the desire to make a tangible difference in people's lives through skilled, thoughtful surgical intervention.
After completing his medical degree at the University of Bristol, he pursued doctoral research at the University of Surrey, earning his MD through work that advanced understanding in his field. This blend of clinical skill and academic rigour continues to inform his practice today.
His specialist training across the South West of England exposed him to the full breadth of general and upper gastrointestinal surgery. Earning the FRCS from the Royal College of Surgeons of England marked the culmination of years of dedicated training and examination.
Now established as a Consultant Surgeon in Devon, Mr Kostalas combines technical precision with a deeply personal approach — taking time to understand each patient's concerns, explaining options clearly, and ensuring that every treatment plan reflects the individual, not just the condition.
Academic Research
Doctoral-level research contributing to evidence-based surgical advancements
FRCS England
Nationally recognised surgical fellowship — the standard of surgical excellence
AUGIS & BBUGSS Member
Active member of leading UK upper GI and bariatric surgical societies
Minimally Invasive Pioneer
Committed to keyhole and robotic techniques for faster recovery and less pain
"Surgery is about more than technical skill. It's about understanding the person behind the condition — their worries, their daily life, and what recovery truly means to them."
Mr Marcos Kostalas
Consultant General & Upper GI Surgeon
Personalised Care
No two patients are the same. Treatment plans are shaped around your specific condition, circumstances, and goals.
Evidence-Based
Every recommendation is grounded in the latest clinical research and proven best practice in upper GI surgery.
Clear Communication
Complex surgical decisions explained in straightforward language — so you feel confident, not confused.
Compassion First
Surgery can be daunting. From first consultation to full recovery, you will be treated with warmth and respect.
PROFESSIONAL AFFILIATIONS
AUGIS
Association of Upper GI Surgeons of Great Britain & Ireland
BBUGSS
British Bariatric & Metabolic Surgery Society
FRCS England
Royal College of Surgeons of England
GMC Registered
General Medical Council
PRACTICE
Surgical Care in Devon
As a Consultant Surgeon in Devon, Mr Kostalas is proud to serve the local community and patients from across the South West. He understands that choosing a surgeon is one of the most important decisions a patient can make — and believes that proximity to high-quality surgical care should not mean compromising on expertise.
Whether you are seeking a specialist Upper GI Surgeon in Devon for reflux surgery, hernia repair, or gallbladder surgery, Mr Kostalas offers consultations and procedures at two well-established hospitals, providing both NHS and private treatment pathways.
Mount Stuart Hospital
Private consultations and day-case procedures in a dedicated private hospital setting
Torbay Hospital
NHS specialist upper GI surgical services within the Torbay and South Devon NHS Foundation Trust
Ready to Take the Next Step?
If you have been referred or are considering a consultation, Mr Kostalas welcomes the opportunity to discuss your situation personally and help you understand your options.
Prefer to speak to someone? Contact our booking team