Dr. Edward Onuma, MD

Gastroenterology •  Male • Age 61
  
Dr. Onuma
Accepting new patients
Telehealth services available

Peninsula Gastrointestinal Specialists

100 S Ellsworth Ave Ste 507 San Mateo, CA 94401

Make an Appointment

(650) 342-7432

Dr. Edward Onuma, MD is a Gastroenterology Specialist in San Mateo, CA and has over 30 years of experience in the medical field. Dr. Onuma has more experience with Esophageal Disorders and Gastrointestinal Disorders than other specialists in his area. He graduated from New York State U, College of Medicine - Upstate medical school in 1990. He is affiliated with Mills-Peninsula Medical Center. He is accepting new patients and has indicated that he accepts telehealth appointments. Be sure to call ahead with Dr. Onuma to book an appointment.


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At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. See hospitals
  • Practices at Top Hospital
    Gastrointestinal Care Excellence Award™ See hospitals

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
Balanced (Prudent Buyer)-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 (Prudent Buyer PPO/ Small Grp)-CA PPO
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 PHC EPO & HDP/HSA-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 Choice / PERSCare Providers-CA 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 PPO (Select Network)-CA PPO
Select-CA PPO
Silver (CaliforniaCare HMO/ Small Grp) HMO
Silver (Prudent Buyer PPO/ Small Grp)-CA PPO
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 Plus HMO
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)
MultiPlan
MultiPlan PPO
PHCS Network PPO
Western Health Advantage

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

Practice Areas

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.

Typically treats 75% more than similar doctors

Based on claims data for 8 conditions and procedures

TreatmentsTreatment Frequency
Heartburn
very high
very high

Treatment Frequency

Dr. Onuma treats Heartburn more than 99% of their peers

Dr. Onuma treats this condition more than 99% of their peers

Dysphagia
very high
very high

Treatment Frequency

Dr. Onuma treats Dysphagia more than 99% of their peers

Dr. Onuma treats this condition more than 99% of their peers

Esophageal Diseases
very high
very high

Treatment Frequency

Dr. Onuma treats Esophageal Diseases more than 95% of their peers

Dr. Onuma treats this condition more than 95% of their peers

Gastrointestinal Disorders

Gastrointestinal disorders specialists diagnose and treat conditions that affect the gastrointestinal tract, including Crohn's disease, ulcers, hernias, and food poisoning.Compare with other Gastrointestinal Disorders specialists.

Typically treats 73% more than similar doctors

Based on claims data for 26 conditions and procedures

TreatmentsTreatment Frequency
Gastrointestinal Diseases
very high
very high

Treatment Frequency

Dr. Onuma treats Gastrointestinal Diseases more than 100% of their peers

Dr. Onuma treats this condition more than 100% of their peers

Abdominal Disorders
very high
very high

Treatment Frequency

Dr. Onuma treats Abdominal Disorders more than 100% of their peers

Dr. Onuma treats this condition more than 100% of their peers

Hemorrhoids
very high
very high

Treatment Frequency

Dr. Onuma treats Hemorrhoids more than 99% of their peers

Dr. Onuma treats this condition more than 99% of their peers

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

Dr. Onuma's conditions and procedures:

  • Abdominal Disorders
  • Abdominal Pain
  • Anal or Rectal Pain
  • Anemia
  • Autoimmune Diseases
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Benign Tumor
  • Biliary Atresia
  • Blood Disorders
  • Cancer
  • Celiac Disease
  • Cholecystitis and Gallstones
  • Cholelithiasis
  • Cirrhosis
  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Colorectal Cancer
  • Constipation
  • Crohn's Disease
  • Dehydration
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Ulcer
  • Duodenitis
  • Dysentery
  • Dysphagia
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Enteritis
  • Esophageal Achalasia and Cardiospasm
  • Esophageal Cancer
  • Esophageal Diseases
  • Esophageal Diverticulum
  • Esophageal Ulcer
  • Esophageal Varices
  • Esophagitis
  • Gallstones
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroenterology Procedures
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Diseases
  • Gastrointestinal Malabsorption
  • Gastrojejunal Ulcer
  • Gastroparesis
  • Heartburn
  • Hemochromatosis
  • Hemorrhoids
  • Hepatitis B - Immune Response
  • Hepatitis C
  • Hepatorenal Syndrome
  • Hernia
  • Ileus
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Ischemia
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Liver Biopsy
  • Liver Damage from Alcohol
  • Malnutrition
  • Megacolon
  • Nausea
  • Neoplasm of Gastrointestinal Tract
  • Non-Alcoholic Fatty Liver Disease
  • Non-Neonatal Jaundice
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Peptic Ulcer
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Small Intestine Cancer
  • Stomach and Small Intestine Cancer
  • Stomach Cancer
  • Stomach Diseases
  • Stomal Ulcer
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Vascular Insufficiency of Intestines
  • Viral Enteritis
  • Viral Hepatitis
  • Vomiting Disorders

Dr. Onuma's Reviews

Likelihood to recommend Dr. Onuma

4.2

Based on 5 ratings

5 Stars
80%
(4)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
20%
(1)
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Dr. Onuma?
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RecentHighestLowestMost Helpful
Reply Flag
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%.
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Sonia – Mar 16, 2018
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Reply Flag
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!
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Jul 03, 2017
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About Me

Biography

Dr. Edward Onuma, MD is a Gastroenterology Specialist in San Mateo, CA and has over 30 years of experience in the medical field. Dr. Onuma has more experience with Esophageal Disorders and Gastrointestinal Disorders than other specialists in his are...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
New York State U, College of Medicine - Upstate
Medical School

Languages

  • Japanese
  • English

Awards

Frequently Asked Questions

Does Dr. Edward Onuma, MD offer telehealth services?

Is Dr. Edward Onuma, MD accepting new patients?

Does Dr. Edward Onuma, MD accept my insurance?

Locations

Peninsula Gastrointestinal Specialists

San Mateo100 S Ellsworth Ave Ste 507 San Mateo, CA 94401
1

Affiliated Hospitals

Check the quality of care at hospitals where Dr. Onuma treats patients.

Learn more

Mills-Peninsula Medical Center

Burlingame, CA

80% Patient experience rating, 11% higher than the national average

  • America's 250 Best Hospitals Award™ (2020, 2019, 2018)
  • America's 50 Best Hospitals Award™ (2020, 2019, 2018)
  • Outstanding Patient Experience Award™ (2020, 2019, 2018)
  • Gastrointestinal Care Excellence Award™ (2018)
  • General Surgery Excellence Award™ (2018)