Home - Andrea Tieng, MD | Gastroenterologist in Rancho Cucamonga

Why Patients Choose Dr. Tieng

"The best doctor I have ever been to, honestly. Very kind and caring. Very unusual for a doctor! If you are having gastro problems this is the doctor to go to!"

Julie S.

Patient

Experienced

20+ years of treating digestive diseases with a focus on prevention, early detection, and long-term digestive health.

Compassionate Care

Personalized digestive care, colon cancer screening and endoscopy for adults throughout the Inland Empire.

Convenient

Future appointment requests are accepted at our Rancho Cucamonga office, with procedures performed across the Inland Empire.

Common Conditions

Procedures

Patient Stories

"I’ve seen some of the “best” GI specialists in the LA area and I’d rate Dr. Tieng higher because of her ability to carefully listen. She is also very professional and has a wonderful bedside manner. Bottom line, I’m very impressed."

Renee C.

“Dr. Tieng is a wonderful doctor with magic healing powers! She is very helpful and she solved my years long problem with just two prescriptions.”

Mohamed J.

"I was always embarrassed to go to a doctor for my intestinal ‘issues’ but the pain and discomfort were finally too much to ask for. I can now report I am pain free! Very happy with my decision and will be recommending Dr. Tieng to all of my friends."

Sarah M.

"Dr. Tieng has really earned our trust. I recommended my wife to her and Dr. Tieng made her feel very secure during her very first colonoscopy. She also takes her time during our appointments. And most importantly, my wife and I are finally comfortable going to see the doctor!

Peter S.

Insurance

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Looking for digestive care?

Call Dr. Tieng’s office to submit a future appointment request in Rancho Cucamonga.

Disclaimer: This information is for educational purposes only and is not medical advice. Always consult your physician regarding your individual health concerns.