John H. Ahn, D.O.



Phone: (727) 796-4166

Primary Location

1840 Mease Dr., Ste. 305,
Safety Harbor, FL 34695

all locations



About John H. Ahn, D.O.

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.

Conditons & Procedures

  • Abdominal Pain
  • Acid Reflux & Gerd
  • Anal Fissures
  • Anal Fistulas
  • Anal Itch
  • Anemia
  • Anorectal Stenosis
  • Barrett's Esophagus
  • Biliary Disease
  • Celiac Disease
  • Cirrhosis
  • Clostridium Difficile (C.Diff)
  • Colitis
  • Colon Diseases & Polyps
  • Colon Fistula
  • Colorectal (Colon) Cancer
  • Constipation
  • Crohn's & Ulcerative Colitis
  • Diarrhea
  • Diverticulitis
  • Dyspepsia
  • Dysphagia
  • Esophageal Disease
  • Fatty Liver Disease
  • Fecal Incontinence
  • Gallbladder Disease
  • Gallstones
  • Gastritis
  • Gastrointestinal Bleeding
  • Gastroparesis
  • H. Pylori
  • Hemorrhoids
  • Hepatitis
  • Non-alcoholic Steatohepatitis
  • Indigestion
  • Inflammatory Bowel Disease
  • Irritable Bowel Syndrome
  • Liver Disease
  • Obesity
  • Pancreatic Cystic
  • Pancreatic Disease & Pancreatitis
  • Pelvic Floor Pain
  • Peptic Ulcer Disease
  • Radiation Proctitis
  • Rectal Ulcer
  • Short Bowel Syndrome
  • Small Intestinal Disorders
  • Stomach Cancer
  • Swallowing Disorders
  • Anoscopy
  • Capsule Endoscopy
  • Colonoscopy (Screening & Diagnostic)
  • EGD (Upper Endoscopy)
  • Endoscopic Mucosal Resection (EMR)
  • Endoscopic Ultrasound (EUS)
  • Enteroscopy (Small & Large Bowel)
  • ERCP & Stents
  • Esophageal Ablation
  • Esophageal Dilation
  • Flexible Sigmoidoscopy
  • Hemorrhoid Treatment & Banding
  • PEG Placement

Office Locations

Primary Location

Gastro Florida - Safety Harbor

1840 Mease Dr.
Ste. 305
Safety Harbor, FL 34695

Phone: (727) 796-4166
Fax: (727) 669-5849

  • North Pinellas Surgery Center

Mease Countryside Hospital

Mease Dunedin Hospital

Morton Plant Hospital



New York Institute of Technology/ New York College of Osteopathic Medicine - Glen Head, NY


Long Island Jewish Medical Center, Queens, NY


Long Island Jewish Medical Center, Queens, NY


Advanced Therapeutic Endoscopy Fellowship: Allegheny Hospital - Pittsburgh, PA

Professional Highlights


  • Board-certified in Gastroenterology
  • Board-certified in Internal Medicine