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Business Details
40 Years
experience
Gastroenterology Care in Redwood City and Mountain View
Peninsula Gastroenterology Medical Group has been dedicated to digestive health care since 1986, serving patients across two locations in Redwood City and Mountain View, California. Our team of board-certified gastroenterologists specializes in diagnosing and treating gastrointestinal disorders and liver diseases, utilizing advanced endoscopic techniques to ensure precise care. We maintain affiliations with leading medical facilities, including El Camino Hospital and Sequoia Hospital, to provide comprehensive treatment options. Our practice emphasizes patient-centered care, with physicians who prioritize thorough explanations and personalized treatment plans. During the COVID-19 pandemic, we expanded our services to include telemedicine consultations for continued accessibility.

Our staff coordinates pre-procedure preparations and post-care follow-ups to ensure seamless patient experiences. We operate in collaboration with the Atherton Endoscopy Center, where our team delivers procedures in a setting designed for patient comfort. Our physicians hold extensive training in specialized techniques such as endoscopic ultrasound and radiofrequency ablation. We provide detailed preparation instructions for all procedures to minimize rescheduling risks. Our commitment to excellence is reflected in our structured office hours and direct communication channels for patient inquiries.
Services
Colonoscopy Hemorrhoid Banding Upper Endoscopy ERCP Flexible Sigmoidoscopy Endoscopic Ultrasound Radiofrequency Ablation Capsule Endoscopy FibroScan Breath Testing
Details
  • Year established: 1986
Highlights and features
  • We offer over 35 years of specialized experience in gastroenterology.
  • Our physicians are board-certified in advanced endoscopic procedures.
  • We provide telemedicine consultations for patient convenience.
  • Our team coordinates care across multiple accredited medical facilities.
  • We emphasize patient education and personalized treatment planning.
What people say
Expert physicians Professional staff Thorough explanations Comfortable environment Timely appointments
Services
Colonoscopy
Colonoscopy allows comprehensive examination of the colon for polyps, cancer, and inflammatory conditions. Our physicians perform this procedure using sedation for patient comfort. Preparation instructions are provided in advance to ensure clear visualization.
Endoscopic Ultrasound
Endoscopic ultrasound combines endoscopy and ultrasound imaging to evaluate digestive tract abnormalities. This technique enables detailed visualization of gastrointestinal walls and surrounding structures. Our specialists use fine needle aspiration when biopsies are required.
Radiofrequency Ablation
Radiofrequency ablation treats Barrett's esophagus by removing abnormal tissue. The HALO360 system delivers controlled thermal energy to eliminate precancerous cells. This outpatient procedure requires careful post-treatment monitoring.
Capsule Endoscopy
Capsule endoscopy uses a swallowable camera to examine the small intestine. This non-invasive method detects sources of bleeding and inflammatory bowel disease. Patients receive specific dietary instructions before the 8-hour procedure.
ERCP
ERCP combines endoscopy and fluoroscopy to diagnose bile duct and pancreatic disorders. Our team performs therapeutic interventions like stone removal and stent placement. Patients receive sedation and require post-procedure observation.
People
James Torosis
MD
Dr. James Torosis specializes in gastrointestinal disorders with expertise in endoscopic procedures. He provides comprehensive care for digestive health conditions at Peninsula Gastroenterology Medical Group.
Vicky Yang
MD
Dr. Vicky Yang treats digestive system diseases using advanced endoscopic techniques. Her practice focuses on personalized patient care and thorough diagnostic evaluations at our Mountain View location.
Daniel Rengstorff
MD
Dr. Daniel Rengstorff offers specialized care for gastrointestinal and liver conditions. He performs endoscopic procedures at our affiliated medical centers with attention to patient comfort and safety.
Cynthia Leung
MD
Dr. Cynthia Leung specializes in digestive health with proficiency in endoscopic ultrasound. She provides detailed explanations of treatment options and coordinates care across medical specialties.
Madhuri Badrinath
MD
Dr. Madhuri Badrinath treats complex gastrointestinal disorders with evidence-based approaches. Her practice emphasizes patient education and coordinated care at our Redwood City facility.
Questions
What gastrointestinal conditions do you treat?
We treat digestive disorders including acid reflux, irritable bowel syndrome, inflammatory bowel disease, and liver conditions through specialized care plans.
Do you offer telemedicine consultations?
Yes, we provide virtual appointments for non-urgent digestive health concerns during regular business hours.
How should I prepare for an endoscopy?
Detailed preparation instructions are sent via email or MyChart. Contact our office if you encounter difficulties accessing these materials.
Where are procedures performed?
Procedures occur at our affiliated facilities: Atherton Endoscopy Center, El Camino Hospital, and Sequoia Hospital.
What insurance plans do you accept?
We work with major insurance providers. Contact our billing department for specific coverage verification.
Reviews (3)
Hong Huynh
May 10, 2022 Report
Used to be better before UCSF took over. The doctor didn't even come by to discuss the results after my procedure. Instead, I was told to schedule an appointment to go over the results if I'd like. The office staff is not friendly and not helpful. They did not send the results of my colonoscopy to my PCP as I requested. The billing department kept billing my colonoscopy as diagnostic and wouldn't change the code. Can not get a hold of a live person to sort out billing with insurance. She doesn't answer the phone and only responds to VM. I would not recommend this office.
Nayuki Minase
Sep 20, 2021 Report
Very unprofessional place. The building looked old and lacking maintenance. I drove 30mins for my appointment only to learn that my doctor was in a meeting and I had to reschedule for another appointment. Seems the doctor was not even clear with his own schedule. Little respect to their patient.
Elana Duss
Dec 11, 2020 Report
It took me many weeks just to get my consultation set up and that was only after my primary care doctor called on my behalf. 2 stars because I liked Dr. Wang in the consult but then after that, I have called at least a dozen times to try to schedule my procedure and I never hear back. you can't reach a human being at this office. I already paid for the prescription for the prep and now I am just sitting on it waiting to hear back from this office. Worst customer service I have ever experienced in a medical practice. I can't recommend.