GASTROENTEROLOGIST • INTERVENTIONAL ENDOSCOPIST

Dr. José
Díaz Tasende

Scientific Director, ICAdig • Co-founder Specialist in Gastroenterology and Advanced Endoscopy

Even the best technology is insufficient if there is no meaningful conversation between patients and their doctors.

12 de Octubre University Hospital Pompeu Fabra University · Master’s in Healthcare Management Training in Tokyo · National Cancer Center Training at Hospital Clínic Barcelona Principal Investigator · COLONPREV SEED · SEPD · AEG
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– About me

Advanced technology with human conversation

Dr. Díaz Tasende is the co-founder and Scientific Director of ICAdig. A specialist in Gastroenterology, he trained at the 12 de Octubre University Hospital in Madrid (1998-2002), where he has spent the majority of his professional career. He has held key leadership positions, including Head of the Endoscopy Unit (2019-2025), Unit Coordinator (2016-2019), and Patient Safety Officer for the Gastroenterology Department (2013-2025).

His expertise in advanced digestive endoscopy includes a fellowship in endoscopic ultrasound (EUS) at Hospital Clínic Barcelona (2009) and specialized training in Endoscopic Submucosal Dissection (ESD) at the National Cancer Center Hospital in Tokyo (2014), a world-renowned center for these techniques. He also holds a Master’s Degree in Healthcare Management from Pompeu Fabra University in Barcelona.

Since 2021, he has served as an Associate Professor at the Complutense University of Madrid, where he also directs the Gastrointestinal Endoscopy Update Course at Hospital 12 de Octubre. Additionally, he collaborates on academic programs at the University of Alcalá and Francisco de Vitoria University.

His institutional leadership has been instrumental in public health policy, having served as the Coordinator of the Colorectal Cancer Screening Program for the Community of Madrid (2016-2018) and as a member of the National Executive Committee of the Alliance for the Prevention of Colorectal Cancer (2017-2021), representing the SEPD and the AEG.

"Understanding each individual’s needs requires not only listening to their story and understanding their context, but helping them find the essential pieces to build a narrative from a scientific perspective. Transforming personal stories into method and science is one of the most important tasks of any physician."

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12 de Octubre University Hospital

Former Head of Section · Endoscopy Unit (2019-2025)
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Complutense University

Associate Professor · Faculty of Medicine (since 2021)
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ICAdig — Co-founder

Scientific Director · C/ Juan Bravo 10, Madrid
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International Training

National Cancer Center, Tokyo · ESD · Hospital Clínic Barcelona · EUS
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Master’s in Healthcare Management

Pompeu Fabra University · Administration and Management of Health Services (2009-2011)
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CRC Screening Program

Former Coordinator · Community of Madrid (2016-2018)
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CRC Prevention Alliance

Former Member of the National Executive Committee (2017-2021)
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Spanish Society of Digestive Pathology

Coordinator · Oncology Area of the Training Program
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Scientific Societies

SEED · SEPD · AEG · Castilian Association of Digestive Diseases

Research and publications

Science that transforms clinical practice

Featured recent publications

The Lancet
COLONPREV — colonoscopy vs. FIT in CRC screening, a non-inferiority trial
2025
UEG Journal
Sex- and Age-Stratified Outcomes of Colonoscopy vs. FIT — post-hoc analysis of the COLONPREV study
2026
Am J Gastroenterol
Endoscopic Vacuum Therapy for upper gastrointestinal leaks and perforations — Spanish multicenter registry
2023
Rev Esp Enferm Dig
ADVANTAGE study — fecal occult blood and calprotectin to prioritize colonoscopy referrals from Primary Care
2023
UEG Journal
SEPD strategic analysis of population-based CRC screening programs in Spain
2024
Endosc Ultrasound
SEPD strategic analysis of population-based CRC screening programs in Spain
2025
Main project
COLONPREV STUDY — colonoscopy vs. FIT in colorectal cancer screening
Randomized controlled non-inferiority clinical trial, published in The Lancet (2025). Dr. Díaz Tasende is the Principal Investigator for the Community of Madrid (2021-2027).
Lines of research
Colorectal cancer screening and advanced endoscopy
Early detection of CRC, IT tools to optimize colonoscopy indications, digestive endoscopic ultrasound (EUS), therapeutic endoscopy, and digestive oncology.
Teaching
UCM, H12O, and specialized training
Associate Professor at UCM since 2021. Coordinator of the Gastrointestinal Endoscopy Update Course at H12O. Former Residency Tutor (2009-2013). Contributor to the chapter in the Clinical Guide for Endoscopic Resection of Colon and Rectal Polyps (SEED, AEG, SEPD).
UCM H12O U. Alcalá U. Francisco de Vitoria
Awards and honors
Recognition for quality of care and research

First prize for best practices in quality management from the Servicio Madrileño de Salud for the PC-SC coordination project in early detection of CRC. Dr. Lorenzo Campins y Ballester Medal for student excellence and Magna Cum Laude distinction.

SEED SEPD AEG

Transforming personal stories into method and science is one of the most important tasks of any physician.

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– Research and publications

What our patients say

“I recently visited the clinic for a digestive system check-up with Dr. Matallana. I have never been treated so well or with such professionalism. She explained every single test in detail, using language that anyone could understand. Without a doubt, I recommend that if you have any issues related to the digestive system, you come here and ask for Dr. Matallana. Thank you very much, Doctor, for everything. Best regards.” -Emilio

“The care I received was excellent, both personally and professionally. Dr. Díaz Tasende is magnificent due to his knowledge, experience, approachability, and problem-solving skills. The institute’s team has shown, on every occasion, the empathy, understanding, and attention that you need as a patient. Both the video call system and the exchange of documentation work very well and allow for efficient progress. Thank you very much!!!” -Lluis

“I took my baby for a consultation with Dr. Galicia, a pediatric gastroenterologist, and it was truly an excellent experience. From the very first moment, the doctor showed a human warmth and professionalism that gave us a great deal of confidence. He took the necessary time to listen to us, evaluate our baby with great gentleness, and explain everything in a clear and understandable way. It is clear that he has great experience and vocation, but above all, that he genuinely cares about the well-being of his patients.” -Paola

“ICAdig is a unique and exclusive clinic with exceptional administrative staff and doctors. At the reception, the staff resolves any paperwork issues with exquisite and friendly service. In the consultation, the doctors are highly professional, demonstrate excellent empathy, and inspire great confidence; you leave the appointment with your questions answered and a solution to whatever the problem may be. My experience in consultations with Dr. José Carlos Marín has been second to none.” -Denis

“A 10/10 for Dr. Fresneda: we spent nearly an hour with her in the consultation without ever feeling like she was rushing us—quite the opposite. She didn’t stop asking questions until she fully understood the medical history and the details of my mother’s digestive issues. Now that healthcare in this country is going down the drain, this center seems like an excellent alternative.” -Jorge

“Dr. Diana Fresneda is an exceptional professional: approachable, clear, and deeply empathetic. She explains every step with a clarity that conveys confidence, and she has the delicacy to always do so through listening and respect.” -Lucia

“Every time I have visited ICAdig, I have received fantastic care. In my specific case, the treatment from Dr. Matallana has been excellent. She knows how to listen and engage with the patient, study their issues, and work toward an accurate diagnosis and appropriate treatment plan. She even facilitates testing at centers outside of ICAdig whenever possible. I am very grateful for that. Without a doubt, a highly recommended medical center for digestive specialties.” -Nestor

“Every aspect is exceptionally optimal from the start. The receptionists, Carolina and Silvia, provide information in a charming manner. The medical professionals are magnificently qualified, have a kind demeanor, and dedicate all the necessary time to the patient without the slightest rush. Thanks to Dr. Díaz Tasende, after being ill for months and having been treated by two previous specialists, I regained my health. Totally recommended. Thank you for your care!” -Maria

– Specialties

Clinical areas of care at ICAdig

General Gastroenterology

Gastroesophageal reflux, gastritis, ulcers, altered bowel habits, and general digestive pathology.

Inflammatory Bowel Diseases

Crohn's disease, ulcerative colitis, and other forms of inflammatory bowel disease.

Functional and Motility Disorders

Functional dyspepsia, irritable bowel, abdominal bloating, constipation, and functional abdominal pain.

Liver Diseases

Viral hepatitis, toxic and metabolic diseases, autoimmune diseases, and liver tumors.

Pancreatic and Biliary Diseases

Gallbladder diseases, acute and chronic pancreatitis, pancreatic tumors, ERCP, and cholangioscopy.

Advanced Endoscopy

ESD, EMR/UEMR, POEM, chromoendoscopy, NBI, esophageal stents, and direct peroral cholangioscopy.

Digestive Cancer Prevention

Individualized screening, hereditary and familial CRC syndromes, polyposis, and early neoplasia.

Pediatric Gastroenterology

Digestive pathology in pediatric age. Specialized assessment and follow-up by pediatric gastroenterologists.

– Icadig

The Clinical Institute of the Digestive System

“At the Clinical Institute of the Digestive System, we know that every person has unique needs. You will find the high-quality time necessary to understand your problem and find the solutions you need, from the first visit to periodic check-ups.

We do not work directly with insurance companies —except for reimbursement policies— which allows us to dedicate the time and attention to each consultation that it deserves, without external constraints.

We offer both in-person consultations at our center in the Barrio de Salamanca and video consultations for patients throughout Spain and abroad, with the same standard of clinical excellence.”

• Continuous quality improvement
Committed to excellence and innovation to exceed every patient’s expectations.
• Teamwork
Regular consultations between specialists to share knowledge, allowing for the resolution of every case.
• Adequate consultation times
Schedule adapted to the real needs of each patient, without rushing.
• Based on scientific evidence
Clinical protocols backed by international reference clinical practice guidelines.
• Secure digital medical records
Intuitive and secure platform to centralize your medical information with ease and confidence.

– Consultations and prices

In-person care and video consultation

IN-PERSON CONSULTATION

Barrio de Salamanca Center

Ideal modality for initial assessment and when a complete physical examination is necessary. Our center is located at C/ Juan Bravo 10, in the heart of the Barrio de Salamanca in Madrid.
First consultation
140€ / session
Follow-up consultation
120€ / session
VIDEO CONSULTATION

From anywhere

Excellent alternative for follow-up and evaluation of complementary tests. The most requested option for a second opinion for patients who do not reside in Madrid. Same quality, without the commute.
First consultation
110€ / session
Follow-up consultation
80€ / session
ICAdig does not work directly with insurance companies. If you have a reimbursement policy, we issue detailed invoices valid for recovering the full or partial amount of the consultation fee.

– Frequently asked questions

Your questions, answered

When should I see a digestive specialist?
If you experience symptoms such as frequent heartburn, abdominal pain, heavy digestion, persistent diarrhea or constipation, changes in bowel habits, difficulty swallowing, or blood in the stool, it is advisable to consult a specialist for an accurate evaluation. Do not wait for symptoms to become chronic.
The video consultation has an identical structure to an in-person visit for everything that does not require a physical examination. It is especially useful for follow-ups, reviewing test results, and second opinions. For an initial assessment where a physical examination is necessary, we recommend an in-person consultation.
ICAdig does not work directly with insurance companies, which allows us to dedicate the necessary time to each consultation. If you have a reimbursement policy, we issue detailed invoices valid for recovering the full or partial amount of the consultation fee.
Endoscopic procedures are performed at HM Sanchinarro Hospital, with all the necessary technical and safety guarantees. The initial consultation and assessment take place at our center at C/ Juan Bravo 10.
You can request your appointment through the online form at icadig.com, by calling +34 659 34 00 20, or by emailing icadig@icadig.com. Our team will guide you to the most appropriate specialist and confirm the date and time.

ICAdig

Book your appointment or ask us

In-person consultations at C/ Juan Bravo 10, Barrio de Salamanca, Madrid.

Video consultations available for all of Spain and abroad.

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