Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Onuma, Gastroenterologist in San Mateo, CA?
Dr. Edward Onuma is a Gastroenterologist, who primarily practices in San Mateo, CA. He is board certified by the American Board of Internal Medicine. Dr. Onuma graduated from State University of New York Upstate Medical University. Dr. Onuma is fluent in English and Japanese, and is currently seeing new patients. Dr. Onuma’s practice accepts Cigna, Medicaid, Medicare, UnitedHealthcare, Aetna and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Onuma’s office at (650) 342-7432.
What are Areas of Expertise for Dr. Onuma?
Dr. Edward Onuma is a highly-rated, board-certified Gastroenterologist known for expertly diagnosing, treating, and managing a wide array of related conditions or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Onuma empowers patients to confidently navigate their health journey, specializing in Barrett's Esophagus, Endoscopy, or comprehensive wellness support. Serving the San Mateo/CA community, Dr. Onuma is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Onuma go to medical school and complete their residency?
Medical School: Upstate Medical University/ College of Health Professions | State University of New York Upstate Medical University
Is Dr. Onuma board certified in Gastroenterologist?
Yes, Dr. Edward Onuma is board certified by the American Board of Internal Medicine
What languages does Dr. Onuma speak?
Dr. Onuma and their clinical team can communicate with patients in the following languages:
English
Japanese
What conditions does Dr. Onuma treat?
As a Gastroenterologist, Dr. Onuma diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Onuma. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Benign Sigmoid Colon Polyp
- Benign Ascending Colon Polyp
- Benign Transverse Colon Polyp
- Benign Descending Colon Polyp
- Benign Cecum Polyp
- Benign Tumor
- Colonic Polyps
- Colon Polyps
- Non-cancerous sigmoid colon growth
- Sigmoid colon adenoma
- Sigmoid colon benign tumor
- Non-cancerous ascending colon growth
- Ascending colon adenoma
- Ascending colon benign tumor
- Non-cancerous transverse colon growth
- Transverse colon adenoma
- Transverse colon benign tumor
- Non-cancerous descending colon growth
- Descending colon adenoma
- Descending colon benign tumor
- Non-cancerous cecum growth
- Cecal adenoma
- Cecum benign tumor
ICD-10 Codes:
- D125: Benign neoplasm of sigmoid colon
- D122: Benign neoplasm of ascending colon
- D123: Benign neoplasm of transverse colon
- D124: Benign neoplasm of descending colon
- D120: Benign neoplasm of cecum
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal Polyps
- Intestinal Polyps
- Bowel Polyps
ICD-10 Codes:
- Z86010: Personal history of colon polyps
Also known as:
- Stomach and Duodenum Disorder
- Stomach Disorder
- Gastric Conditions
- Duodenal Conditions
- Digestive System Disorders
ICD-10 Codes:
- K3189: Other diseases of stomach and duodenum
Also known as:
- Diarrhea
- Loose stools
- Runny poop
- Frequent bowel movements
ICD-10 Codes:
- R197: Diarrhea, unspecified
Also known as:
- Other Esophagus Condition
- Barrett's Esophagus
- Esophagus Disorder
- Barrett’s Esophagus
- Various esophageal diseases
- Miscellaneous esophagus problems
- Other food pipe issues
- Barrett's condition
- Esophageal metaplasia
ICD-10 Codes:
- K2289: Other specified disease of esophagus
- K2270: Barrett's esophagus without dysplasia
Also known as:
- Large Intestine Diverticulosis
- Diverticulosis and Diverticulitis
- Diverticular Disease
- Colon Diverticula
- Pockets in the Colon
ICD-10 Codes:
- K5730: Diverticulosis of large intestine without perforation or abscess without bleeding
Also known as:
- Upper Middle Abdominal Pain
- Abdominal Pain
- Epigastric pain
- Pain below breastbone
- Upper stomach pain
ICD-10 Codes:
- R1013: Epigastric pain
Also known as:
- Hemorrhoids
- Piles
- Anal veins
- Swollen rectal veins
ICD-10 Codes:
- K648: Other hemorrhoids
Also known as:
- Anemia
- Low Red Blood Cell Count
- Low Hemoglobin
- Iron deficiency
ICD-10 Codes:
- D649: Anemia, unspecified
Also known as:
- Heartburn
- Acid Reflux
- Indigestion
- GERD Symptoms
ICD-10 Codes:
- R12: Heartburn
Also known as:
- Dark, Tarry Stools (Melena)
- Gastrointestinal Bleeding
- Melena
- Black Stools
- Upper GI Bleed Signs
ICD-10 Codes:
- K921: Melena
Also known as:
- Family History of Digestive Organ Cancer
- Cancer
- Family History
- Genetic risk for gastrointestinal cancer
- Family history of GI cancer
- Hereditary digestive cancer
ICD-10 Codes:
- Z800: Family history of malignant neoplasm of digestive organs
Also known as:
- Other Abnormal Enzyme Levels
- Unspecified high enzymes
- Various enzyme abnormalities
- Abnormal serum enzyme levels
ICD-10 Codes:
- R748: Abnormal levels of other serum enzymes
Also known as:
- Constipation
- Difficulty Passing Stool
- Infrequent Bowel Movements
- Hard Stools
ICD-10 Codes:
- K5909: Other constipation
Which procedures does Dr. Onuma perform as a Gastroenterologist?
As a Gastroenterologist, procedures performed by a Dr. Edward Onuma may include:
- Colonoscopy
- Colonoscopy Consultation
- Colorectal Cancer Screening
- Endoscopic Ultrasound
- Endoscopy / Endoscopic Ultrasound
- Gastric Balloon
- Gastric Stimulator Implantation Consultation
- Gastric Stimulator Implantation Follow Up
For detailed information, please contact Dr. Onuma's office.
Does Dr. Onuma accept my insurance?
Dr. Onuma accepts most major insurance plans. Important: Please call our office at (650) 342-7432 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Onuma accept in San Mateo, CA?
Dr. Onuma in San Mateo, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alignment Health Plan
All Other Third Party
Blue Shield of California
Cigna
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Medicare
Other Provider Networks
Sutter Health
UnitedHealthcare
View All Insurances
Where is Dr. Onuma's office located?
Dr. Edward Onuma's Primary Practice
100 S Ellsworth Ave Ste 507
San Mateo, CA 94401
(650) 342-7432
What is Dr. Onuma's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Onuma's National Provider Identifier (NPI) number is 1477559722.
What common questions do patients ask about Dr. Onuma?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Onuma
What is Dr. Edward Onuma's specialty?
Dr. Onuma is a Gastroenterologist near San Mateo, CA. An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs. Contact Dr. Onuma to book an appointment today.
Is this Dr. Edward Onuma affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Onuma is affiliated with Mills-Peninsula Medical Center which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Edward Onuma accepting new patients in San Mateo, CA?
Yes, Dr. Edward Onuma is accepting new patients at this time.
Does Dr. Edward Onuma offer online booking?
Please contact Dr. Onuma's office at (650) 342-7432 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Edward Onuma?
Please contact Dr. Onuma's office at (650) 342-7432 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Edward Onuma have?
Dr. Edward Onuma is certified by the American Board of Internal Medicine.
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