Dr. John Ahn, D.O.

john ahn do Dr. Ahn was born in Seoul, South Korea and immigrated to the United States in his early teens. He is a graduate of Colgate University in New York, and completed his medical degree from New York Institute of Technology/ New York College of Osteopathic Medicine. Dr. Ahn completed internal medicine training and gastroenterology fellowship training in Long Island Jewish Medical Center in New York and subsequently finished one additional year of advanced therapeutic endoscopy fellowship at Allegheny General Hospital in Pittsburgh. Dr. Ahn is board certified in Gastroenterology by the American Board of Internal Medicine and also certified in Board of Osteopathic Medical Examiners. Furthermore, he is also trained in acupuncture and alternative medicine. Dr. Ahn is currently interested in integrating his holistic training background and advanced technical therapeutic endoscopy skills in conjunction with alternative medicine to treat his patients. Dr. Ahn has been in practice for over 20 years and he prizes commitment to quality and aims to provide compassionate patient centered care.

General Gastroenterology and Weight Loss
Advanced Endoscopic Retrograde Cholangiopancreatography (ERCP)
Endoscopic Ultrasonography (EUS)
Acupuncture & Related Complementary Treatment


Allegheny Hospital in Pittsburgh
Long Island Jewish Medical Center
New York College of Osteopathic Medicine

Morton Plant Hospital
Mease Countryside Hospital
Mease Dunedin Hospital

Countryside Surgery Center
North Pinellas Surgery Center

1840 Mease Drive
Suite 305
Safety Harbor, FL 34695

Phone: (727) 796-4166

Web Links
Coming Soon

What Patients Are Saying

“Dr. Ahn is an exceptional Gastroenterologist who cares about his patients and provides the best of care. I have recommended him to many of my friends and family. He is the best!!!!!”
- Mary’s 2018 Healthgrades Review

“Dr. Ahn is very professional and attentive. He always took his time whenever I saw him in the office. I also had an EGD done with him. Everything went great. I would recommend him. He is very knowledgeable and up to date on latest treatments. He is also very caring. I was going through a stressful time in life and he was like my GI doc and my therapist. He helped me very much.”
- Jennifer’s 2018 Google Review

“Our family have been going to this office for years and we all have been more than satisfied each and every visit. Dr Ahn also was so thorough, he caught my cancer during a routine colonoscopy. It was minute that he tattooed the area so that the surgeon could easily find it and remove it successfully.”
- Anonymous’ 2018 Patient Survey Comment

“As a person in the medical field myself I have to say I was extremely impressed with Dr. Ahn and his staff! He is attentive and really listens to your concerns. He spent a lot of time with me during my visit and explained everything clearly. His office staff was helpful and kind. I can't say enough good about this practice! Get into them if you can they are the best!”
- Stephanie’s 2017 Google Review