Your Notifications
All done, no notifications
Dr. Wichai Yooyongwattana

Dr. Wichai Yooyongwattana

Bariatric Surgeon ·
, Bangkok, Thailand

23 Years of experience ·
Languages Spoken: Thai , English

Wichai Yooyongwattana is currently available for hospital consultations. Explore online consultation options or book an in-person visit.

About Dr. Wichai Yooyongwattana

Conditions treated by Dr. Wichai Yooyongwattana

Kindly have a look at the various conditions whose treatment is done by Dr. Wichai Yooyongwattana:

  • Bile Duct Cancer
  • Colon Cancer and Bowel Diseases
  • Ulcer
  • Liver Cancer
  • Gastrointestinal Cancer
  • Colon Cancer
  • Anal Cancer
  • Jaundice
  • Celiac Disease
  • Abdominal Pain
  • Esophageal Varices
  • Rectal Cancer
  • Pancreatic Cancer
  • Crohn's Disease Or Severe Diverticulitis
  • Pancreatitis
  • Gastrointestinal Bleeding
  • Inflammatory Bowel Diseases
  • Crohn's Disease

Sores on the stomach lining and small intestine and inflammation of the large intestine or pancreas are two really prevalent gastroenterological problems in patients. Gallbladder condition and even a liver disease mean that your visit to a Gastroenterologist should not be delayed at any cost. It is this specialty which has the solutions of any problem or condition linked to the digestive system.

Signs and Symptoms treated by Dr. Wichai Yooyongwattana

A gastroenterological condition is confirmed if the below mentioned signs and symptoms are experienced.:

  • Lethargy
  • Changes in bowel habits that are beginning to concern you
  • Vomiting
  • Persistent heartburn/ GERD
  • Gallstones
  • Pale coloured stools
  • Leakage/ stains in underwear
  • Coeliac disease
  • Bloating or abdominal pain
  • Rectal bleeding/ blood in stool
  • Inflammatory bowel disease (IBD)
  • Oesophageal discomfort
  • Urine of dark colour
  • Bowel movements that are hard to control
  • Belching or excessive gas
  • Loss of weight and appetite

Even seemingly less harmful and everyday symptoms like diarrhea, constipation and heartburn can be an evidence of something more serious if it is happening repeatedly and persistently. Gastroenterological conditions which start becoming chronic in nature do manifest in symptoms like blood in the stool and yellowing of the skin. Time is of essence when you are undergoing treatment for these health issues and one must be careful to not let the illness deepen its hold onto the body further.

Operating Hours of a Gastroenterlogist

The doctor operates from 9 am to 5 pm, from Monday to Saturday only. Known for being an expert physician in the field of Gastroenterology, the doctor is also highly accomplished.

Popular Procedures performed by Dr Wichai Yooyongwattana

It is the following important popular procedures that the Dr. Wichai Yooyongwattana performs on the patients.:

  • Abdominoperineal Resection
  • Hemicolectomy
  • Endoscopy (UGI Endoscopy)

It is this doctor who manages the treatment of and also performs the right treatment of a wide range of gut related conditions in patients. The work of a Gastroenterologist does not involve surgery per se, the procedures they perform are usually for diagnosis purposes and cannot be termed as surgical. If the treatment requires surgery at any point of treatment the patient is advised to visit a gastrointestinal surgeon.

Qualification

  • MD.Faculty of Medicine, Mahidol University Ramathibodi Hospital, Thailand, 1996-2001

Work Experiences

  • Internal medicine Internship, Nakhon Phanom Hospital, Thailand, 2001-2002
  • Internal Medicine Residency, Na Wa Hospital, Thailand, 2002-2004
  • Internal Medicine Residency, Ramathibodi Hospital, Thailand, 2004-2007
  • Specialist in Gastroenterology and Hepatology, Piyavate Hospital, Thailand, 2009-2011

Certifications (3)

  • Diploma of the Thai Board of General Medicine, Ramathibodi Hospital, Thailand, 2005-2007
  • Diploma of the Thai Board of Gastroenterology, Ramathibodi Hospital, Thailand, 2008-2009
  • Fellowship in Gastroenterology and Hepatology Unit, Ramathibodi Hospital, Thailand, 2007-2009

Ready to Speak with Wichai Yooyongwattana?

Book a secure video consultation for expert Weight Loss Specialist care.

Procedures Performed

Abdominoperineal Resection
Adhesion Lysis
Cardiomyotomy
Endoscopy (UGI Endoscopy)
Foregut Surgery
Hemicolectomy
Hiatal Hernia Repair
Ileoanal Anastomosis (J-Pouch) Surgery
Laparoscopic Colon Resection
Laparoscopic Ventral Hernia Repair
Low Anterior Resection
Meckel's Diverticulectomy Treatment
Nissen Fundoplication
Pancreatectomy
Pancreatic Surgery
Partial Colectomy
Peroral Endoscopic Myotomy (POEM)
Proctectomy
Retroperitoneum Surgery
Robotic Hernia Surgery
Small Bowel Resection
Splenectomy
Stapled Hemorrhoidopexy
Subtotal Proctocolectomy
Total Colectomy

Frequently Asked Questions

Dr. Wichai Yooyongwattana is a specialized Gastroenterologist and is one of the most sought after doctors in Bangkok, Thailand.

No, this doctor does not offer telemedicine via MediGence

Dr. Wichai Yooyongwattana is one of the most sought after specialists in Thailand and has over 19 Years years of experience.

FAQ's Related to Gastroenterologist

It is a Gastroenterologist who helps you get treated for the health conditions you suffer from related to the digestive system. Recommending tests, asking the right questions regarding your health condition, checking your medical history is also what the doctor does during the initial phase of treatment. Also, a Gastroenterologist helps you in managing your conditions through the right medications and assisting you with the lifestyle and diet changes if required. A Gastroenterologist must have the knowledge of various factors such as:

  1. Gastrointestinal organs
  2. Movement of matter via intestines and stomach
  3. Digestion, absorption of nutrients
  4. Removal of body waste
  5. Liver system

A consultation with a Gastroenterologist comes with the requirement of some tests to be performed either before or during the process and they are listed below:

  • pH Monitoring
  • Upper GI Series (barium swallow or barium meal)
  • Esophageal/Gastric Manometry
  • Gastroscopy
  • Endoscopic Ultrasound
  • Endoscopic Retrograde Cholangiopancreatography (ERCP)

Gastroscopies, Liver biopsies and Sigmoidoscopies are some of the important procedures that help in the better understanding of the gastroenterological conditions. In the case of Colonoscopy, Sigmoidoscopy, a camera attached to a thin, long tube is inserted via the rectum and in Endoscopy via the mouth. The purpose in both cases is to assess the health condition of the digestive system and tract through the images taken in this process. Diagnostic imaging tests such as Computed tomography scan (CT or CAT scan), Magnetic resonance imaging (MRI) and Ultrasound are non invasive methods to understand the cause of the condition, confirm diagnoses and monitor the treatment response.

You must go to see a Gastroenterologist when there are symptoms pointing towards an issue with the digestive system or digestive tract or your age means that a regularly checkups for colorectal cancer are required. Sometimes the condition is clear and not just an indicative symptom, few conditions that would need a visit are suspected gallstones, ulcers, and Hemorrhoids. Even a recovery from a surgical process can be helped along seamlessly if the journey towards excellent digestive health is faster.

Explore Telemedicine Specialists

Dr. Vishwas Kaushik
Reviewer

MBBS, MD

7 Years of Experience

Last Reviewed - June 2026

Dr. Vishwas Kaushik is a qualified medical professional holding an MBBS from the prestigious Belgorod State University, Russia, with a strong foundation in clinical medicine and healthcare practice. His comprehensive medical training has equipped him with a profound understanding of evidence-based clinical practices, patient-centered care, and the evolving landscape of modern medicine. With a keen interest in medical research and scientific communication, he consistently translates complex clinical concepts into clear, accurate, and accessible content for diverse audiences. His work reflects a deep commitment to advancing medical knowledge, delivering impactful healthcare insights, and bridging the gap between clinical expertise and accessible medical communication.
View More
Tanya Bose
Author

MSc Biotechnology

4 Years of Experience

Last Reviewed - June 2026

Tanya Bose is a medical content specialist with a strong medical background. She has completed her Bachelor's and Master’s in Biotechnology from Amity University. With a deep understanding of biomedical sciences and research, she develops authoritative and patient-focused medical content covering treatments, surgical procedures, and healthcare innovations. Her writing emphasizes accuracy, clarity, and evidence-based information to help readers better understand complex medical topics. She is dedicated to improving patient awareness and supporting informed healthcare decisions by delivering trustworthy medical insights in a clear and accessible format.
View More

Please Enquire

Required | alphabets and spaces
Required | A valid, working email address
Required | A valid contact

Not Sure About Your Treatment Plan? Get a Free Second Opinion

Have your reports reviewed by independent oncology experts to help you make a confident treatment decision, all online within 48 hours