Peninsula Gastrointestinal Specialists: Gastroenterologist San ...
Gastroenterology • San Simeon, CA
About
Peninsula Gastrointestinal Specialists, Inc. is a San Mateo-based gastroenterology medical practice offering digestive health services (e.g., stomach pain, acid reflux, constipation). The private company operates 4 offices in the United States and has annual revenue around $4.24 million. Contact: contactus@mygidoctors.net, phone (650) 342-7432. Website: mygidoctors.com. Notable metrics include steady web traffic (~4k monthly visits) and a small workforce (2–10 employees).
Clinic Type
Gastroenterology
Address
San Mateo, CA
Phone
(650) 342-7432
contactus@mygidoctors.net
Opening Hours
Office hours not specified on page
Website
Services Offered
Technology & Equipment
Team
Insurance & Payment
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New Patients, Payment
Languages Spoken
Current Offers
New patient information
FAQs
What is Peninsula GI Specialists?
Gastroenterologists in San Mateo, CA, focused on digestive problems with patient-centered care.
What services are offered?
Gastroenterology services including endoscopic procedures and patient education.
FAQ question not provided in the text
Not available
Social Media
Photos
What Patients Say
Overall sentiment across review platforms: mixed
- Birdeye: 3.4/5 stars (14 reviews)
- Birdeye: 4.8/5 stars (30 reviews (at time of source access))
- Yelp: 1.5/5 stars (2 reviews)
- WebMD Care: 4/5 stars (Dr. Onuma) (5 reviews)
- WebMD Care: 5/5 stars (Dr. Lee) (1 review (Dr. Lee))
Patients praise
- Professional and experienced physicians
- Kind, patient, and supportive staff members
- Thorough exams and clear explanations of conditions
- Clean and efficient office environment
Common complaints
- Billing and insurance processing concerns
- Appointment scheduling issues
- Negative feedback regarding physician bedside manner in isolated instances
"Dr. Onuma and Nancy are professional, kind, patient, supportive, and caring. My office visits are always such a wonderful experience. They are welcoming, there is no wait time, appointments start promptly, and scheduling is trouble free. Dr. Onuma and Nancy provide outstanding and world-class service."
— WebMD Care Patient Review"Doctor Onuma seems to do a good job; the problem is the billing department. I just received a bill for nearly $300 for a procedure performed ten months ago."
— Yelp ReviewSynthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].
In the News
- Dr. Vino Verghese, MD - Gastroenterologist in Burlingame, CA — May 14, 2026
- Dr. Philip Y. Wong, MD - Gastroenterologist in Vallejo, CA — May 14, 2026
- Margaret O'Connor, NP - Saint Helena, CA - Gastroenterology - Book Appointment — May 22, 2026
- Bao Sean H. Nguyen, MD - Internal Medicine | UCLA Health — Jan 29, 2026
- Ronald Omino, MD - Gastroenterology - Simi Valley Alamo Specialty Care | UCLA Health — May 27, 2026
Information sourced from the clinic's website as of July 10, 2026.
More gastroenterology clinics in San Simeon
UCSF Health (UCSF Medical Center) is a nonprofit teaching hospital system in San Francisco, affiliated with the UCSF School of Medicine. It provides comprehensive care across clinics, treatments, and patient education, and is consistently ranked among the top U.S. hospitals. The system includes main campus sites (Parnassus Heights/Mount Sutro), Mission Bay expansion, and Mount Zion affiliation, with a focus on advanced specialties including cancer, neuroscience, and translational research. For gastroenterology-specific care at UCSF Health, you would typically access expert GI services through UCSF Medical Center’s core teaching hospital, part of UCSF Health, with multiple San Francisco locations and specialty clinics. Phone and contact details are available on the UCSF Health site for scheduling and referrals.
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