
Prof. Dr. Art Hiranyakas
Colorectal Surgeon
- Prof. Dr. Art Hiranyakas has over 20 years of expertise as a prominent Colo-Rectal Surgeon in Thailand.
- He has performed over 900 colorectal surgeries across a broad range of procedures and disorders.
- He is regarded as one of the best colorectal surgeons in the Asia Pacific, Thailand and Western countries.
- He is an expert in providing services of Anal Cancer, Colon Cancer and Rectal Cancer.
- He is a Director of Bangkok-Phuket Colorectal Disease Institute at Bangkok Hospital Phuket and a Director of Colorectal Surgery Clinic at Bangkok Hospital Headquarters in Bangkok.
- Prof. Dr. Art Hiranyakas is a fellow of American College of Surgeons (ACS), American Society of Colon and Rectum Surgeons (ASCRS), Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), and International College of Surgeons (ICS).
- He has completed DM (1998) and Surgery (2002) from Prince of Songkla University, Thailand.
- He has a Doctor of Philosophy (2019) from the school of Medicine and Dentistry, James Cook University, Australia.
- Prof. Dr. Art Hiranyakas is well-versed in Thai and English.
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- Prof. Dr. Art Hiranyakas has over 20 years of expertise as a prominent Colo-Rectal Surgeon in Thailand.
- He has performed over 900 colorectal surgeries across a broad range of procedures and disorders.
- He is regarded as one of the best colorectal surgeons in the Asia Pacific, Thailand and Western countries.
- He is an expert in providing services of Anal Cancer, Colon Cancer and Rectal Cancer.
- He is a Director of Bangkok-Phuket Colorectal Disease Institute at Bangkok Hospital Phuket and a Director of Colorectal Surgery Clinic at Bangkok Hospital Headquarters in Bangkok.
- Prof. Dr. Art Hiranyakas is a fellow of American College of Surgeons (ACS), American Society of Colon and Rectum Surgeons (ASCRS), Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), and International College of Surgeons (ICS).
- He has completed DM (1998) and Surgery (2002) from Prince of Songkla University, Thailand.
- He has a Doctor of Philosophy (2019) from the school of Medicine and Dentistry, James Cook University, Australia.
- Prof. Dr. Art Hiranyakas is well-versed in Thai and English.

Dr. Charlie Laohapand
Medical Gastroenterologist
- Dr. Charlie Laohapand is one of the leading Gastroenterologists in Bangkok, Thailand.
- He has been practicing for the past 14 years.
- His expertise lies in the treatment of Viral hepatitis, Liver Diseases, and Cirrhosis.
- He completed his MD Faculty of Medicine from Siriraj Hospital, Mahidol University, Thailand, in 2008.
- After that, he did Diploma of Thai Board of Internal Medicine. Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand, in 2014 and Diploma of Thai Sub Board of Gastroenterology. Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand, in 2016.
- He speaks English and Thai.
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- Dr. Charlie Laohapand is one of the leading Gastroenterologists in Bangkok, Thailand.
- He has been practicing for the past 14 years.
- His expertise lies in the treatment of Viral hepatitis, Liver Diseases, and Cirrhosis.
- He completed his MD Faculty of Medicine from Siriraj Hospital, Mahidol University, Thailand, in 2008.
- After that, he did Diploma of Thai Board of Internal Medicine. Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand, in 2014 and Diploma of Thai Sub Board of Gastroenterology. Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand, in 2016.
- He speaks English and Thai.

Dr. Aroon Siripun
Medical Gastroenterologist
- Dr. Aroon Siripun has nearly 18 years of clinical experience as a Medical Gastroenterologist.
- He is focused on Gastroenterology, Hepatology and Internal Medicine.
- He is a member of the Thai Medical Council.
- Dr. Aroon Siripun has completed MD (2002) from Chiang Mai University, Thailand.
- He has been trained in Internal Medicine (2008) and Gastroenterology (2010) from Rajavithi Hospital, Thailand.
- He has been trained in Advanced Therapeutic Endoscopy (2014) at Prince of Songkla University, Thailand.
- He practised Gastroenterology (2013) at Nagoya University Graduate school of Medicine, Japan.
- He enrolled in EUS Program (2014) at BIDS - Baldota Institute of Digestive Sciences, India.
- Dr. Aroon Siripun is well-versed in English, Japanese and Thai.
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- Dr. Aroon Siripun has nearly 18 years of clinical experience as a Medical Gastroenterologist.
- He is focused on Gastroenterology, Hepatology and Internal Medicine.
- He is a member of the Thai Medical Council.
- Dr. Aroon Siripun has completed MD (2002) from Chiang Mai University, Thailand.
- He has been trained in Internal Medicine (2008) and Gastroenterology (2010) from Rajavithi Hospital, Thailand.
- He has been trained in Advanced Therapeutic Endoscopy (2014) at Prince of Songkla University, Thailand.
- He practised Gastroenterology (2013) at Nagoya University Graduate school of Medicine, Japan.
- He enrolled in EUS Program (2014) at BIDS - Baldota Institute of Digestive Sciences, India.
- Dr. Aroon Siripun is well-versed in English, Japanese and Thai.

Dr. Rewat Boonanuwat
Medical Gastroenterologist
- Dr. Rewat Boonanuwat is one of the renowned Gastroenterologists having 14 years of experience.
- His areas of expertise are the digestive system and liver disease treatment.
- After completing his MD with first class honours from Siriraj Hospital, Mahidol University, Thailand, in 2008, he did Diploma of Thai Board of Internal Medicine., Thailand, in 2014, and Diploma of Thai Sub Board of Gastroenterology., Thailand, in 2016.
- He speaks Thai and English.
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- Dr. Rewat Boonanuwat is one of the renowned Gastroenterologists having 14 years of experience.
- His areas of expertise are the digestive system and liver disease treatment.
- After completing his MD with first class honours from Siriraj Hospital, Mahidol University, Thailand, in 2008, he did Diploma of Thai Board of Internal Medicine., Thailand, in 2014, and Diploma of Thai Sub Board of Gastroenterology., Thailand, in 2016.
- He speaks Thai and English.
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Dr. Songphol Malakorn
Colorectal Surgeon
- With +15 years of medical expertise, Dr. Songphol Malakorn is a Colo-Rectal Surgeon in Thailand.
- His special interests lie in Robotic-Assisted Colorectal Surgery, Laparoscopic-Assisted Colorectal Surgery, Colorectal Surgical Oncology and Benign Anorectal Diseases.
- Dr. Songphol Malakorn is a member of the Thai Subboard of Surgical Oncology and the Thai Board of Surgery and the Thai Medical Council.
- He has completed MD (2003) from Chulalongkorn University, Thailand.
- He has obtained Fellowships in Corolectal Surgery (2012) from the King Chulalongkorn Memorial Hospital and Advanced Colon and Rectal Surgical Oncology (2019) from the University of Texas, MD Anderson Cancer Center, Texas, USA.
- Dr. Songphol Malakorn is well-versed in Thai and English.
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- With +15 years of medical expertise, Dr. Songphol Malakorn is a Colo-Rectal Surgeon in Thailand.
- His special interests lie in Robotic-Assisted Colorectal Surgery, Laparoscopic-Assisted Colorectal Surgery, Colorectal Surgical Oncology and Benign Anorectal Diseases.
- Dr. Songphol Malakorn is a member of the Thai Subboard of Surgical Oncology and the Thai Board of Surgery and the Thai Medical Council.
- He has completed MD (2003) from Chulalongkorn University, Thailand.
- He has obtained Fellowships in Corolectal Surgery (2012) from the King Chulalongkorn Memorial Hospital and Advanced Colon and Rectal Surgical Oncology (2019) from the University of Texas, MD Anderson Cancer Center, Texas, USA.
- Dr. Songphol Malakorn is well-versed in Thai and English.

Dr. Rawisak Chanwat
Hepatopancreatobiliary Surgeon
- Dr. Rawisak Chanwat is a leading Surgical Oncologist with a medical background spanning over 22 years.
- He is a specialist in Hepato-Pancreato-Biliary disease and Cancer and Laparoscopic Surgery for Liver cancer.
- Dr. Rawisak Chanwat is a member of the Thai Medical Council and the Thai Board of Surgery.
- He has completed MD (1998) and Surgery (2005) from Chulalongkorn University, Thailand.
- He obtained a Clinical Fellowship from Institute of Gastroenterology, Tokyo Women's Medical University, Japan.
- Dr. Rawisak Chanwat is well-versed in Thai and English.
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- Dr. Rawisak Chanwat is a leading Surgical Oncologist with a medical background spanning over 22 years.
- He is a specialist in Hepato-Pancreato-Biliary disease and Cancer and Laparoscopic Surgery for Liver cancer.
- Dr. Rawisak Chanwat is a member of the Thai Medical Council and the Thai Board of Surgery.
- He has completed MD (1998) and Surgery (2005) from Chulalongkorn University, Thailand.
- He obtained a Clinical Fellowship from Institute of Gastroenterology, Tokyo Women's Medical University, Japan.
- Dr. Rawisak Chanwat is well-versed in Thai and English.

Dr. Nathavut Sirimontaporn
Medical Gastroenterologist
- Dr. Nathavut Sirimontaporn is a prominent Gastroenterologist with over 24+ of experience in the medical field.
- He specializes in diagnosing and treating disorders related to the gastrointestinal tract and liver.
- His areas of expertise are treating Liver Diseases, Colonoscopy, Colorectal, Endoscopy, etc.
- He has various board certifications including a Diploma of the Thai Board of Internal Medicine, The Medical Council of Thailand, 2005, and a Diploma of the Thai Sub Board of Gastroenterology and Hepatology, 2009.
- He is proficient in various dialects mainly English, Thai, and Teo Chew.
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- Dr. Nathavut Sirimontaporn is a prominent Gastroenterologist with over 24+ of experience in the medical field.
- He specializes in diagnosing and treating disorders related to the gastrointestinal tract and liver.
- His areas of expertise are treating Liver Diseases, Colonoscopy, Colorectal, Endoscopy, etc.
- He has various board certifications including a Diploma of the Thai Board of Internal Medicine, The Medical Council of Thailand, 2005, and a Diploma of the Thai Sub Board of Gastroenterology and Hepatology, 2009.
- He is proficient in various dialects mainly English, Thai, and Teo Chew.

Dr. Thanyadej Nimmanwudipong
Surgical Gastroenterologist
- Dr. Thanyadej Nimmanwudipong is one of the best surgical gastroenterologists in Thailand and has over 30 years of experience in this field.
- Areas of expertise include Gastroenterology Surgery, Advanced Laparoscopic Abdominal and Gastrointestinal Surgery and Minimal Invasive Surgery.
- His caring behaviour has earned him a stellar patient record.
- He completed Fellowship in Surgical Research from the University of Lousville and a Diplomate from the Thai Board of Critical Care Medicine.
- The Doctor holds a Certificate of Proficiency in General Surgery from Mahidol University in 1986.
- Dr. Thanyadej is proficient in English & Thai.
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- Dr. Thanyadej Nimmanwudipong is one of the best surgical gastroenterologists in Thailand and has over 30 years of experience in this field.
- Areas of expertise include Gastroenterology Surgery, Advanced Laparoscopic Abdominal and Gastrointestinal Surgery and Minimal Invasive Surgery.
- His caring behaviour has earned him a stellar patient record.
- He completed Fellowship in Surgical Research from the University of Lousville and a Diplomate from the Thai Board of Critical Care Medicine.
- The Doctor holds a Certificate of Proficiency in General Surgery from Mahidol University in 1986.
- Dr. Thanyadej is proficient in English & Thai.

Dr. Somkiat Ussavarojpong
Colorectal Surgeon
- Dr. Somkiat Ussavarojpong is a General Surgeon with experience of 28 years.
- He completed Medical degree, from the faculty of medicine, Siriraj Hospital, Mahidol University 1995 and Diplomate from Thai board of General surgery in 2001
- He is specialized in Colorectal Surgery, Laparoscopic & Endoscopic surgery
- Dr. Somkiat has written several extensive publications for international and national journals.
- He also Certificates in Endoscopic Surgery, Advanced traumatic life support, and Breast reconstruction.
- His special clinical interest lies in General Surgery, and Colorectal Surgery.
- He is fluent in English and Thai.
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- Dr. Somkiat Ussavarojpong is a General Surgeon with experience of 28 years.
- He completed Medical degree, from the faculty of medicine, Siriraj Hospital, Mahidol University 1995 and Diplomate from Thai board of General surgery in 2001
- He is specialized in Colorectal Surgery, Laparoscopic & Endoscopic surgery
- Dr. Somkiat has written several extensive publications for international and national journals.
- He also Certificates in Endoscopic Surgery, Advanced traumatic life support, and Breast reconstruction.
- His special clinical interest lies in General Surgery, and Colorectal Surgery.
- He is fluent in English and Thai.

Dr. Rattana Boonsirichan
Medical Gastroenterologist
- Dr. Rattana Boonsirichan is one of the best gastroenterologists in Thailand and has over 28 years of experience in this field.
- Areas of expertise include acid-peptic disorders, IBD, IBS and other functional gastrointestinal disorders like constipation, diarrhoeal disorders with or without malabsorption syndrome like celiac disease and liver diseases
- She holds a certificate in advanced therapeutic endoscopy from Germany.
- Dr. Rattana completed Doctor of Medicine (MD.) from Mahidol University.
- Her caring behaviour has earned her a stellar patient record.
- The doctor is proficient in English & Thai.
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- Dr. Rattana Boonsirichan is one of the best gastroenterologists in Thailand and has over 28 years of experience in this field.
- Areas of expertise include acid-peptic disorders, IBD, IBS and other functional gastrointestinal disorders like constipation, diarrhoeal disorders with or without malabsorption syndrome like celiac disease and liver diseases
- She holds a certificate in advanced therapeutic endoscopy from Germany.
- Dr. Rattana completed Doctor of Medicine (MD.) from Mahidol University.
- Her caring behaviour has earned her a stellar patient record.
- The doctor is proficient in English & Thai.

Assoc. Prof. Phunchai Charatcharoenwitthaya
Medical Gastroenterologist
- Assoc. Prof. Phunchai Charatcharoenwitthaya is a skilled Gastroenterologist having 27+ years of experience in this field.
- He is adept in performing Endoscopy and treating digestive disorders.
- His area of interest is Internal Medicine and Gastroenterology.
- He has reputed articles published in Journals.
- He held the post of Associate Prof. (Medicine), Mahidol University, Faculty of Medicine, Siriraj Hosp., Bangkok, Thailand.
- He completed MD, and Internal Medicine (Faculty of Medicine) from Siriraj Hospital Mahidol University, Thailand, in 1993 and 1999 respectively.
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- Assoc. Prof. Phunchai Charatcharoenwitthaya is a skilled Gastroenterologist having 27+ years of experience in this field.
- He is adept in performing Endoscopy and treating digestive disorders.
- His area of interest is Internal Medicine and Gastroenterology.
- He has reputed articles published in Journals.
- He held the post of Associate Prof. (Medicine), Mahidol University, Faculty of Medicine, Siriraj Hosp., Bangkok, Thailand.
- He completed MD, and Internal Medicine (Faculty of Medicine) from Siriraj Hospital Mahidol University, Thailand, in 1993 and 1999 respectively.

Assoc. Prof. Varayu Prachayakul
Hepatopancreatobiliary Surgeon
- Dr. Varayu Prachayakul is an accomplished Gastroenterologist having 27+ years of experience in this field.
- He is adept in performing cholangioscopy / pancreatoscopy and single balloon assisted enteroscopy.
- His area of interest is gastrointestinal bleeding, colon cancer screening, endoscopic ultrasound (EUS) in both diagnosis and therapeutic procedures.
- He has done Certification in Advanced Therapeutic Endoscopy and Endosonography, University Medical Center Hamburg-Eppendorf, Germany (2008).
- He was awarded for the outstanding medical student (1993).
- He had published some case reports, case series and articles in various Journals.
- He is a member of Thai Board of Gastroenterology.
- He pursued MD from Faculty of Medicine, Siriraj Hospital, Mahidol University (1993).
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- Dr. Varayu Prachayakul is an accomplished Gastroenterologist having 27+ years of experience in this field.
- He is adept in performing cholangioscopy / pancreatoscopy and single balloon assisted enteroscopy.
- His area of interest is gastrointestinal bleeding, colon cancer screening, endoscopic ultrasound (EUS) in both diagnosis and therapeutic procedures.
- He has done Certification in Advanced Therapeutic Endoscopy and Endosonography, University Medical Center Hamburg-Eppendorf, Germany (2008).
- He was awarded for the outstanding medical student (1993).
- He had published some case reports, case series and articles in various Journals.
- He is a member of Thai Board of Gastroenterology.
- He pursued MD from Faculty of Medicine, Siriraj Hospital, Mahidol University (1993).
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