Dr. Edward Onuma, MD

GastroenterologyMaleAge 63

Gastroenterology

Dr. Edward Onuma, MD is a Gastroenterology Specialist in San Mateo, CA and has over 32 years of experience in the medical field. Dr. Onuma has extensive experience in Pancreatic Disease and Esophageal Disorders. He graduated from STATE UNIVERSITY OF NEW YORK / HEALTH SCIENCE CENTER AT SYRACUSE in 1990. He is affiliated with Mills-peninsula Medical Center. His office accepts new patients and telehealth appointments.

Dr. Edward Onuma, MD

Peninsula Gastrointestinal Specialists

100 S Ellsworth Ave Ste 507 San Mateo, CA 94401
Accepting new patients
Telehealth services available

Make an Appointment

(650) 342-7432
Telehealth services available

Accepting new patients

Healthgrades Provider Compare™

Quickly compare more Gastroenterology Specialists in your area

Hospital Highlight

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

At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Offers Telehealth
    This provider offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    Gastrointestinal Care Excellence Award™ See hospitals

Experience and Background Checks

Experience
Background

Background Check

No malpractice claims found for California
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Frequently Treated by Dr. Onuma

Based on treatment records, we have identified the following as areas of care that Dr. Onuma treats more often than their peers. If you are unsure whether Dr. Onuma treats other conditions, please contact the office at (650) 342-7432.

Pancreatic Disease

Pancreatic disease specialists diagnose and treat conditions affecting the pancreas, such as pancraetitis.Compare with other Pancreatic Disease specialists.

Dr. Onuma is experienced in the area of Pancreatic Disease. See the graph below to learn more about his experience.

Based on claims data for 1 condition or procedure

Treatments
Dr. Onuma
Similar Providers
Pancreatitis
Normal
Frequency
High
Frequency
Very High
Frequency

Esophageal Disorders

Esophageal disorder specialists diagnose and treat conditions affecting the esophagus, such as reflux esophagitis, indigestion, and esophageal ulcers through procedures including medication, surgery, and swallowing therapy.Compare with other Esophageal Disorders specialists.

Dr. Onuma is experienced in the area of Esophageal Disorders. See the graph below to learn more about his experience.

Based on claims data for 19 conditions and procedures

Treatments
Dr. Onuma
Similar Providers
Heartburn
Dysphagia
Hiatal Hernia
Barrett's Esophagus
Normal
Frequency
High
Frequency
Very High
Frequency

Check Dr. Onuma's experience treating your condition or procedure

Dr. Onuma's conditions and procedures:

  • Abdominal Aortic Aneurysm (AAA)
  • Abdominal Pain
  • Achalasia
  • Acute Deep Vein Thrombosis (DVT)
  • Acute Venous Embolism Thrombosis
  • Anal or Rectal Pain
  • Anemia
  • Aneurysm
  • Aortic Aneurysm
  • Arteriovenous Malformation (AVM)
  • Atherosclerosis
  • Atherosclerosis of Aorta
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Boerhaave's Syndrome
  • Celiac Disease
  • Chronic Deep Vein Thrombosis (DVT)
  • Cirrhosis
  • Colon Cancer Screening
  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Colorectal Cancer Screening
  • Constipation
  • Crohn's Disease
  • Deep Vein Thrombosis (DVT)
  • Dehydration
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diffuse Esophageal Spasm
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Polypectomy
  • Duodenal Ulcer
  • Duodenitis
  • Dysentery
  • Dysphagia
  • Embolism
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Enteritis
  • Eosinophilic Esophagitis
  • Esophageal Achalasia and Cardiospasm
  • Esophageal Diverticulum
  • Esophageal Motility Disorders
  • Esophageal Ulcer
  • Esophageal Varices
  • Esophagitis
  • Familial Adenomatous Polyposis
  • Food Allergy
  • Gallbladder Scan
  • Gallstones
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Malabsorption
  • Gastroparesis
  • Heartburn
  • Hemorrhoids
  • Hepatitis A Screening
  • Hepatitis B - Immune Response
  • Hepatitis B Virus Screening
  • Hepatitis C
  • Hepatitis C Virus Screening
  • Hepatitis Screening
  • Hernia
  • Hiatal Hernia
  • Ileus
  • Impedance Testing
  • Indigestion
  • Inflammatory Bowel Disease
  • Instrumental Diagnostic Evaluation for Dysphagia
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Ischemic Colitis
  • Liver Biopsy
  • Liver Damage from Alcohol
  • Liver Function Test
  • Mallory-Weiss Syndrome
  • Malnutrition
  • Nausea
  • Neoplasm of Gastrointestinal Tract
  • Non-Alcoholic Fatty Liver Disease
  • Non-Neonatal Jaundice
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Pelvic Abscess
  • Peptic Ulcer
  • Peripheral Arterial Disease of Extremities
  • Peripheral Nerve Disorders
  • Peripheral Vascular Disease (PAD, PVD)
  • pH Probe
  • Port Placements or Replacements
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Renal Artery Arteriosclerotic Disease
  • Ruptured Aortic Aneurysm
  • Screening Colonoscopy
  • Stomal Ulcer
  • Ulcerative Colitis
  • Ultrasound, Endoanal
  • Ultrasound, Esophageal
  • Unexplained Weight Loss
  • VAP Lipid Testing
  • Varicose Veins
  • Vascular Duplex Ultrasonography and Plethysmography
  • Venous Embolism and Thrombosis
  • Venous Insufficiency
  • Viral Hepatitis
  • Vomiting Disorders
  • Whipple's Disease
  • Wireless pH Testing

Insurance Check

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Dr. Onuma accepts

Accepted insurance can change. Please double-check when making an appointment.

(650) 342-7432

Dr. Onuma accepts the following insurance:

Aetna
Aetna HMO
Choice Plus POS II
Anthem
Advantage-CA HMO
Advantage-CA PPO
Blue Cross (CACare) - Individual-CA HMO
Blue Cross (CACare) - Large Group-CA HMO
Blue Cross (CACare) - Small Group-CA HMO
Blue Cross (Prudent Buyer) - Individual-CA PPO
Blue Cross (Prudent Buyer) - Large Group-CA PPO
Blue Cross (Prudent Buyer) - Small Group-CA PPO
Blue Cross (Prudent Buyer) - Student Health-CA PPO
Blue Cross-CA HMO-POS
Bronze EPO (Prudent Buyer / Small Grp)-CA PPO
Bronze EPO (Prudent Buyer EPO/ Small Grp)-CA
Bronze Select (Select PPO/ Small Grp)-CA PPO
Bronze Select w/ H.S.A (Select PPO/ Small Grp)-CA PPO
Bronze w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Dignity Health Custom Advantage-CA HMO
Dignity Health EPO / PPO-CA
Dignity Health Ventura EPO/PPO-CA
EPO-CA
Gold (CaliforniaCare HMO/ Small Grp) HMO
Gold (Prudent Buyer PPO/ Small Grp)-CA PPO
Gold Advantage-CA PPO
Gold EPO (Prudent Buyer / Small Grp)-CA PPO
Gold EPO (Prudent Buyer EPO/ Small Grp)-CA
Gold Select (Select PPO/ Small Grp)-CA PPO
Lumenos Plans-CA PPO
Major Risk Medical Insurance Program (MRMIP) - Prudent Buyer-CA PPO
MemorialCare Custom-CA PPO
National (BlueCard Basic) PPO
National (BlueCard) PPO
PERS Traditional-CA HMO
Platinum (CaliforniaCare HMO/ Small Grp) HMO
Platinum (Prudent Buyer PPO/ Small Grp)-CA PPO
Platinum Select (Select PPO/ Small Grp)-CA PPO
Select (PERS Select Providers)-CA PPO
Select Plus-CA HMO
Select-CA PPO
Silver (CaliforniaCare HMO/ Small Grp) HMO
Silver Advantage-CA PPO
Silver EPO (Prudent Buyer EPO/ Small Grp)-CA
Silver EPO w/ H.S.A (Prudent Buyer/Small Grp)-CA PPO
Silver Select (Select PPO/ Small Grp)-CA PPO
Silver Select w/ H.S.A (Select PPO/ Small Grp)-CA PPO
Silver w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Tenet Network-CA PPO
Traditional
Traditional PPO
UC Care-CA PPO
UC CORE-CA PPO
UC Health Savings Plan-CA
UC High Option Supplement to Medicare-CA
UC Medicare with Prescription Drugs-CA PPO
UC Medicare without Prescription Drugs-CA PPO
UC Resident and Fellows-CA PPO
UCSHIP-CA PPO
USC Plan (Two Tiered Network)-CA HMO
Blue Cross Blue Shield
Blue Card PPO
Blue Cross Blue Shield of California
Advantage Preferred DirectAccess Plus PPO
Blue Cross Blue Shield of California PPO
Select PPO
Blue Shield of California
Access Plus Savenet
Local Access Plus HMO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
Chinese Community Health Plan (CCHP)
Cigna
Cigna HMO
Cigna PPO
LocalPlus
Open Access Plus
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Humana
Choice Care PPO
MultiPlan
MultiPlan PPO

Dr. Onuma's Reviews

Likelihood to recommend Dr. Onuma

3.7

Based on 6 ratings

5 Stars
66.66666666666667%
(4)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
33.333333333333336%
(2)
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How likely are you to recommend
Dr. Onuma
What went well
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What could be improved
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RecentHighestLowestMost Helpful
Reply
Incredibly inefficient front desk staff. Save yourself the headache and look for another GI doctor if you want to avoid scheduling, billing, getting lab results, etc. issues.
What went well
No results
What could be improved
  • Staff wasn't friendly
Helpful
Jul 13, 2021
×Post a ResponseAre you Dr. Edward Onuma, MD?
Reply
Dr Onuma is my second opinion dr He is very kind and concerned about all your health conditions.He knows how to explain, listen and speaks to his patient. To me having others medical conditions and being treated for different specialists . The main key for a good dr is having all good !!! Mentioned above !!! That I was missing from my previous Gastrentologist . Excellent and I will recommend him 100%.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Sonia – Mar 16, 2018
×Post a ResponseAre you Dr. Edward Onuma, MD?
Reply
Dr. Onuma is a fantastic doctor! He takes the time to listen to you and your concerns. He also takes the time to get to know you. He is great at returning calls if you have a concern or need anything. I am so grateful that I found him!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
8 people found this helpful
Helpful
Jul 03, 2017
×Post a ResponseAre you Dr. Edward Onuma, MD?

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About Me

Biography

Dr. Edward Onuma, MD is a Gastroenterology Specialist in San Mateo, CA and has over 32 years of experience in the medical field. Dr. Onuma has extensive...Read more

Specialties

  • Gastroenterology
  • Vascular Surgery

Board Certifications

  • Gastroenterology
  • Internal Medicine

Education

Robert Wood Johnson University Hospital
Fellowship Hospital
1995
Robert Wood Johnson University Hospital
Residency Hospital
1993
Robert Wood Johnson University Hospital
Internship Hospital
1992
St Vincent's Hosp & Med Ctr
Residency Hospital
1990
STATE UNIVERSITY OF NEW YORK / HEALTH SCIENCE CENTER AT SYRACUSE
Medical School
,

Languages

  • English
  • Japanese

Awards

Frequently Asked Questions

Does Dr. Edward Onuma, MD offer telehealth services?

Dr. Onuma has indicated that they offer telehealth. Contact the office to check for eligibility for your needs.

Is Dr. Edward Onuma, MD accepting new patients?

Dr. Edward Onuma, MD generally accepts new patients on Healthgrades. You can see Dr. Onuma's profile to make an appointment.

Does Dr. Edward Onuma, MD accept my insurance?

Use the Healthgrades insurance check to verify if Dr. Onuma accepts your insurance.

What are Dr. Edward Onuma, MD's top areas of care?

Dr. Onuma frequently treats Pancreatic Disease and Esophageal Disorders. See all practice areas where Dr. Onuma specializes.

Where is Dr. Edward Onuma, MD's office located?

Dr. Onuma's office is located at 100 S Ellsworth Ave Ste 507, San Mateo, CA 94401. Find other locations and directions on Healthgrades.

What languages does Dr. Edward Onuma, MD speak?

Dr. Onuma speaks Japanese and English. View profile to see all.

How can I make an appointment with Dr. Edward Onuma, MD?

Find contact information here to make an appointment.

Locations

Peninsula Gastrointestinal Specialists

Peninsula Gastrointestinal Specialists100 S Ellsworth Ave Ste 507 San Mateo, CA 94401
1

Affiliated Hospitals

Dr. Onuma is affiliated with the following hospital. Select the hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Mills-peninsula Medical Center

Burlingame, CA

82% Patients that would definitely recommend, 12% higher than the national average

26 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2022)