The 20 Best Irritable Bowel Syndrome (IBS) Doctors Near Me in Fontana, CA
Find the Top Irritable Bowel Syndrome (IBS) Experts and Specialists
Andrea S Tieng MD, Inc
Dr. Andrea Tieng was born and raised in New York City. She graduated Summa Cum Laude from the City University of New York and completed her medical degree at the State University of New York Health Science Center at the SUNY Downstate College of Medicine in Brooklyn, New York.Her internship and residency in Internal Medicine was completed at the Albert Einstein College of Medicine at Long Island Jewish Medical Center in New Hyde Park, New York, where she also fulfilled her Gastroenterology and Hepatology Fellowship.Board Certified by the American Board of Internal Medicine, Dr. Tieng is licensed to practice in both California and New York. She is a member of the American College of Gastroenterology and the American Gastroenterology Association.Prior to founding her own practice in Redlands and San Bernardino, Dr. Tieng worked as a private gastroenterologist at Cedars-Sinai Medical Center in Los Angeles.Dr. Tieng specializes in providing sensitive and compassionate care to women, and delivers personalized care to all patients 18 years and older. Dr. Tieng is a board certified physician who treats patients with gastrointestinal illnesses and liver diseases. She utilizes innovative technology to perform diagnostic and therapeutic procedures of the gastrointestinal tract, including colonoscopy and upper endoscopy. Dr. Tieng is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). She is also highly rated in 4 other conditions, according to our data. Her clinical expertise encompasses Diverticular Disease, Familial Adenomatous Polyposis, Gastritis, Gastrectomy, and Endoscopy. Dr. Tieng is board certified in Internal Medicine. Dr. Tieng is currently accepting new patients.
Fontana Medical Center
Blanca Viramontes is a Gastroenterologist practicing medicine in Fontana, California. Dr. Viramontes is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her clinical expertise encompasses Hemorrhoids, Diverticular Disease, Banti's Syndrome, Esophageal Varices, and Endoscopy.
Fontana Medical Center
Alexander Han is a Gastroenterologist practicing medicine in Fontana, California. Dr. Han is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His clinical expertise encompasses Esophageal Varices, Hemorrhoids, Banti's Syndrome, Mallory-Weiss Syndrome, and Endoscopy. Dr. Han is currently accepting new patients.
Fontana Medical Center
Timothy Kuo is a Gastroenterologist practicing medicine in Fontana, California. Dr. Kuo is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His clinical expertise encompasses Bile Acid Malabsorption, Hemorrhoids, Visceromegaly, Alcoholic Cirrhosis, and Endoscopy. Dr. Kuo is currently accepting new patients.
Fontana Medical Center
Robert Kung is a primary care provider, practicing in Gastroenterologist in Fontana, California. Dr. Kung is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His clinical expertise encompasses Gastritis, Esophageal Varices, Alcoholic Cirrhosis, Mallory-Weiss Syndrome, and Endoscopy. Dr. Kung is currently accepting new patients.
Optum - Rialto
Camille De S Chano is a primary care provider, practicing in Family Medicine in Rialto, California. She has been practicing medicine for over 17 years. Dr. De S Chano is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Obesity, Osteomyelitis in Children, Type 2 Diabetes (T2D), and Obesity in Children.
Cucamonga Valley Medical Group, Inc.
Kimberly Bekemeier is a primary care provider, practicing in Family Medicine in Fontana, California. She has been practicing medicine for over 19 years. Dr. Bekemeier is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). She is also highly rated in 28 other conditions, according to our data. Her clinical expertise encompasses Obesity, Obesity in Children, Cirrhosis, and High Cholesterol. Dr. Bekemeier is board certified in American Board Of Family Medicine.
Cucamonga Valley Medical Group, Inc.
Jesse Minguez is a primary care provider, practicing in Family Medicine in Fontana, California. He has been practicing medicine for over 24 years. Dr. Minguez is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 49 other conditions, according to our data. His clinical expertise encompasses Familial Combined Hyperlipidemia, Xanthoma, Cirrhosis, and Alcoholic Neuropathy. Dr. Minguez is board certified in American Board Of Family Medicine.
Arrowhead Regional Medical Center
Tam Huynh is a primary care provider, practicing in Internal Medicine in Colton, California. Dr. Huynh is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). She is also highly rated in 15 other conditions, according to our data. Her clinical expertise encompasses Diabetic Retinopathy, Type 2 Diabetes (T2D), Gastroparesis, and Glucocorticoid-Remediable Aldosteronism.
Andro Sharobiem, MD
Andro Sharobiem is a primary care provider, practicing in Internal Medicine in Riverside, California. Dr. Sharobiem is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 59 other conditions, according to our data. His clinical expertise encompasses Sepsis, Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Gastrostomy, and Colonoscopy. Dr. Sharobiem is currently accepting new patients.
Basim Z. Abdelkarim, M.D., Inc.
Basim Abdelkarim is a Gastroenterologist practicing medicine in Upland, California. He has been practicing medicine for over 27 years. Dr. Abdelkarim is rated as a Distinguished provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 67 other conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Hemorrhoids, Gastroesophageal Reflux Disease (GERD), Gastrostomy, and Endoscopy. Dr. Abdelkarim is board certified in American Board Of Internal Medicine.
Ct Hung MD Inc.
Chuang-ti Hung is a Gastroenterologist practicing medicine in Upland, California. Dr. Hung is rated as a Distinguished provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 47 other conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Trichohepatoenteric Syndrome, Hemorrhoids, Gastrectomy, and Gastrostomy.
Kevin Jenkins, Do, Inc.
Kevin Jenkins is an Internal Medicine provider practicing medicine in Upland, California. He has been practicing medicine for over 53 years. Dr. Jenkins is rated as a Distinguished provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Irritable Bowel Syndrome (IBS), Diverticular Disease, Hemorrhoids, Gastrectomy, and Gastrostomy. Dr. Jenkins is board certified in American Osteopathic Board Of Internal Medicine.
Valiant Medical Group, Inc.
Chu Le is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 28 years. Dr. Le is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Cirrhosis, Familial Combined Hyperlipidemia, and Xanthoma. Dr. Le is board certified in American Board Of Family Medicine.
Kim, Jin Man, M.D., Inc.
Jin Kim is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 31 years. Dr. Kim is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Hypertensive Heart Disease, Enlarged Liver, Restless Legs Syndrome, and Pediatric Myocarditis. Dr. Kim is board certified in American Board Of Family Medicine.
Viet D. Ta MD & Tiffany L. Quan MD Medical Associates Inc.
Cong Phan is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Phan is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 23 other conditions, according to our data. His clinical expertise encompasses Angiodysplasia of the Colon, Acute Kidney Failure, Visceromegaly, Gastrostomy, and Endoscopy.
Cucamonga Valley Medical Group, Inc.
Mirelle Ignacio is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. She has been practicing medicine for over 22 years. Dr. Ignacio is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). She is also highly rated in 26 other conditions, according to our data. Her clinical expertise encompasses Obesity, Methylmalonic Acidemia with Homocystinuria, Sulfite Oxidase Deficiency, and Hypermethioninemia. Dr. Ignacio is board certified in American Board Of Family Medicine.
Fagan, John A. Family Practice, Inc.
John Fagan is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 40 years. Dr. Fagan is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 45 other conditions, according to our data. His clinical expertise encompasses Ehlers-Danlos Syndrome (EDS), Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension. Dr. Fagan is board certified in American Board Of Family Medicine.
SAC Health System
David Ahamba is a primary care provider, practicing in Family Medicine in San Bernardino, California. Dr. Ahamba is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His clinical expertise encompasses Myelitis, HIV/AIDS, AIDS Dementia Complex, and AIDS Dysmorphic Syndrome.
Optum - Colton Cooley
Kelvin Ma is a primary care provider, practicing in Family Medicine in Colton, California. Dr. Ma is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Osteomyelitis in Children, Type 2 Diabetes (T2D), Obesity, and Sciatica.
Last Updated: 04/28/2026
