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San Mateo, CA Gastroenterologists | Sutter Health Doctors

GastroenterologySan Mateo, CA

★★★★☆3.9/512 reviews across 2 platforms

Ratings by platform

  • WebMD Care: 4.0/5 (5 ratings)
  • Healthgrades: 3.9/5 (7 reviews)

What patients say

Patients praise

  • Professional and attentive patient care by individual physicians
  • Effective communication and kindness from medical staff
  • Prompt and well-organized office visits reported by some patients

Common complaints

  • Difficulties with bureaucratic processes and scheduling appointments
  • Concerns regarding billing practices and insurance authorization communication
  • Reports of long wait times for appointments and responses

In patients' words

"Dr. Onuma and Nancy are professional, kind, patient, supportive, and caring. My office visits are always such a wonderful experience."

WebMD Care

"The frequent ineptitude by their clinicians and support staff is shocking. And there is no accountability... Our second issue is that now they can't seem to keep our appointments."

Better Business Bureau

How these reviews were compiled

Synthesized from public patient-review platforms as of Jul 10, 2026 — sources: [1][2][3][4][5][6][7][8].

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