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 Colitis. Her top areas of expertise are Diverticular Disease, Familial Adenomatous Polyposis, Gastritis, Gastrectomy, and Endoscopy.

John Fagan is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Fagan is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Ehlers-Danlos Syndrome (EDS), Hypertension, Familial Hypertension, and Glucocorticoid-Remediable Aldosteronism.

Azhar Majeed is a primary care provider, practicing in Family Medicine in Upland, California. Dr. Majeed is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Hypertensive Heart Disease, Acute Kidney Failure, COVID-19, Gastrostomy, and Endoscopy.

Mike Zuniga is a primary care provider, practicing in Family Medicine in Upland, California. Dr. Zuniga is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, Hypertension, and Cirrhosis.

Louis Dibernardo is a primary care provider, practicing in Family Medicine in Upland, California. Dr. Dibernardo is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Tracheitis, Lymphangitis, Otitis, and Cellulitis.

Basim Abdelkarim is a Gastroenterologist in Upland, California. Dr. Abdelkarim is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Diverticular Disease, Hemorrhoids, Gastroesophageal Reflux Disease (GERD), Gastrostomy, and Endoscopy.

Chuang Hung is a Gastroenterologist in Upland, California. Dr. Hung is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Diverticular Disease, Trichohepatoenteric Syndrome, Hemorrhoids, Gastrectomy, and Gastrostomy.

Ravinder Singh is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Singh is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Milk-Alkali Syndrome, Hypercalcemia, Type 2 Diabetes (T2D), Hormone Replacement Therapy (HRT), and Parathyroidectomy.

Bhavesh Patel is a Gastroenterologist in Rancho Cucamonga, California. Dr. Patel is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Painful Swallowing, Swallowing Difficulty, Bile Duct Obstruction, Endoscopy, and Gastrostomy.

Hussein Abidali is a Gastroenterologist in Rancho Cucamonga, California. Dr. Abidali is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Gastrointestinal Bleeding, Hiatal Hernia, Congenital Diaphragmatic Hernia, Endoscopy, and Gastrostomy.

Kevin Jenkins is a Gastroenterologist in Upland, California. Dr. Jenkins is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Irritable Bowel Syndrome (IBS), Diverticular Disease, Hemorrhoids, Gastrectomy, and Gastrostomy.

Your child's health is my top priority. Dr. Mohideen is rated as an Experienced provider by MediFind in the treatment of Colitis. Her top areas of expertise are Food Allergy, Obesity in Children, Otitis, and Candida Infection of the Skin.

Carlos Vigil is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Vigil is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Acute Kidney Failure, Renovascular Hypertension, End-Stage Renal Disease (ESRD), Gastrostomy, and Endoscopy.

Steven Barag is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Barag is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Vitamin D Deficiency, Sciatica, Male Pseudohermaphroditism with Gynecomastia, and Eunuchoidism Familial Hypogonadotropic.

Renier Rosquete-Mendez is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Rosquete-Mendez has been practicing medicine for over 18 years and is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Obesity in Children, Food Allergy, Type 2 Diabetes (T2D), and High Cholesterol.

Harvey Cohen is a primary care provider, practicing in Geriatrics and Internal Medicine in Rancho Cucamonga, California. Dr. Cohen is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Familial Hypertension, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Obesity.

Iyad Hanna is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Hanna is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Maturity Onset Diabetes of the Young, and Chronic Cough.

Zaher Azzawi is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Azzawi is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Orbital Cellulitis, Tracheitis, Cellulitis, and Lymphangitis.

Nischita Merla is a Gastroenterologist in Upland, California. Dr. Merla is rated as an Experienced provider by MediFind in the treatment of Colitis. Her top areas of expertise are Cronkhite-Canada Disease, Attenuated Familial Adenomatous Polyposis, Juvenile Polyposis Syndrome, Endoscopy, and Gastrostomy.

Michael Chai is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Chai is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Necrotizing Vasculitis, Small Cell Lung Cancer (SCLC), Lung Cancer, Myringotomy, and Gastrostomy.