Meet Dr. Andrea Tieng
Experienced. Compassionate. Personalized.
Dr. Andrea Tieng is an experienced gastroenterologist providing compassionate, personalized digestive care to adults in Rancho Cucamonga and throughout the Inland Empire. She takes time to listen carefully, explain treatment options clearly, and help patients feel comfortable throughout their care.
With more than 20 years in medicine and over 15 years specializing in gastroenterology, Dr. Tieng evaluates and treats a broad range of digestive and liver conditions. Her approach combines extensive clinical experience with thoughtful, individualized care focused on each patient’s long-term health.
Credentials at a Glance
- 20+ years in medicine
- 15+ years in gastroenterology
- Fellowship training in gastroenterology and hepatology
- Female gastroenterologist
- Accepting future appointment requests
- Languages spoken: English and Cantonese
Temporary Medical Leave
Dr. Tieng is currently on temporary medical leave with plans to return in the fall of 2026, when she can safely provide the attentive, high-quality care her patients deserve. Her office remains open to assist current patients and accept future appointment requests.
Education & Training
Dr. Tieng received her medical degree from the State University of New York Downstate College of Medicine in Brooklyn, New York.
She completed her internship and residency in Internal Medicine, followed by a fellowship in Gastroenterology and Hepatology, at Long Island Jewish Medical Center, part of the Albert Einstein College of Medicine in New York.
Professional Experience
Before establishing her private practice in Rancho Cucamonga, Dr. Tieng practiced gastroenterology in the Los Angeles area, including at Cedars-Sinai Medical Center. She has extensive experience caring for patients in both office and outpatient procedural settings.
Before establishing her private practice, Dr. Tieng practiced as a gastroenterologist at Tower Digestive Health Medical Group in Beverly Hills, providing comprehensive gastroenterology care and performing advanced endoscopic procedures.
Every patient deserves to feel heard, informed, and confident in their care.
Dr. Tieng believes in building lasting relationships with her patients by listening carefully, explaining diagnoses in clear language, and partnering with each individual to develop the most appropriate treatment plan.
Her goal is simple: to provide expert digestive health care with the compassion, attention, and respect every patient deserves.
Professional Memberships and Certification
Looking for an experienced female gastroenterologist?
Call to submit a future appointment request with Dr. Andrea Tieng.
Disclaimer: This information is for educational purposes only and is not medical advice. Always consult your physician regarding your individual health concerns.