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Dr. Edward Onuma, MD

Dr. Edward Onuma, MD

Gastroenterology*
30+ years of experience

Dr. Edward Onuma, MD is a gastroenterologist in San Mateo, CA and has over 30 years of experience in the medical field. Dr. Onuma has extensive experience in Esophageal Disorders and Pancreatic Disease. He graduated from STATE UNIVERSITY OF NEW YORK / HEALTH SCIENCE CENTER AT SYRACUSE in 1990. He is affiliated with Mills-Peninsula Medical Center. He is accepting new patients and telehealth appointments.

3.9 Star Rating
Based on 7 reviews 3.9 Star Rating (7 reviews)

Practice

100 S Ellsworth Ave Ste 507 San Mateo, CA 94401
Telehealth available

Make an Appointment

(650) 342-7432

Hospital Highlight

Dr. Onuma is affiliated with Mills-Peninsula Medical Center Burlingame, a highly rated and top awarded hospital for gastroenterology.

At a Glance

  • Area of Expertise
    Dr. Onuma specializes in the area of Gastroenterology. • See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    Gastrointestinal Care Excellence Award™ • See hospitals
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Dr. Onuma's Reviews

Likelihood to recommend Dr. Onuma

3.9

7 ratings, 4 with a written review
5 Star
71%
71%
4 Star
0%
0%
3 Star
0%
0%
2 Star
0%
0%
1 Star
29%
29%

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RecentHighestLowestMost Helpful
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Mar 28, 2025
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What went well
No results
What could be improved
  • Staff wasn't friendly
1 person found this helpful
Helpful
Jul 13, 2021
×Post a ResponseAre you Dr. Edward Onuma, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Sonia – Mar 16, 2018
×Post a ResponseAre you Dr. Edward Onuma, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
9 people found this helpful
Helpful
Jul 03, 2017
×Post a ResponseAre you Dr. Edward Onuma, MD?

Leave a review

How was your experience with Dr. Onuma?

Know Before You Go

About Me

biography

Dr. Edward Onuma, MD is a gastroenterologist in San Mateo, CA and has over 30 years of experience in the medical field. Dr. Onuma has extensive experience in Esophageal Disorders and Pancreatic Disease. He graduated from STATE UNIVERSITY OF NEW...read more

  • Gastroenterology

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • State University Of New York / Health Science Center At Syracuse

    Medical School, 1990
American Board of Medical Specialties®
American Board of Internal Medicine®
- 
Gastroenterology
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Learn more about medical license public record check

  • English

  • Japanese

Focus on IBD

Locations

Practice

Peninsula Gastrointestinal100 S Ellsworth Ave Ste 507 San Mateo, CA 94401
1

Affiliated Hospitals

  • Mills-Peninsula Medical Center

    1501 Trousdale Dr
    Burlingame, CA 94010
    Recipient of 46
    hospital awards

    America's 100 Best Hospitals Award™ (2025, 2024, 2023)

    Superior clinical outcomes in colorectal surgeries, gallbladder removal, upper gastrointestinal surgery, and treating bowel obstruction, gastrointestinal bleeds, and pancreatitis

    America's 250 Best Hospitals Award™ (2025, 2024, 2023)

    Superior clinical outcomes in colorectal surgeries, gallbladder removal, upper gastrointestinal surgery, and treating bowel obstruction, gastrointestinal bleeds, and pancreatitis

    View all awards

    How patients felt about the care they received at this hospital.

    87%
    Patients said they were given information about recovering at home

    3% higher than the national average

    80%
    Patients would recommend the hospital to friends and family

    15% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality