Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Oei, Gastroenterologist in Fontana, CA?
Dr. Tommy Oei, MD is a Gastroenterologist, who primarily practices in Fontana, CA with 1 additional practice location. He is board certified. Dr. Oei graduated from New York University School of Medicine and completed his residency at Univ Of S Ca/Lac & Usc, Gastroenterology; Ucla Med Ctr/Ucla D Geffen Sch, Internal Medicine. Dr. Oei is fluent in English, and is currently seeing new patients. Dr. Oei’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Oei’s office at (909) 427-3910.
Where did Dr. Oei go to medical school and complete their residency?
Residency: Univ Of S Ca/Lac & Usc, Gastroenterology; Ucla Med Ctr/Ucla D Geffen Sch, Internal Medicine
Medical School: New York Univ Sch of Med, New York Ny | New York University School of Medicine
Is Dr. Oei board certified as a Gastroenterologist?
Yes, Dr. Tommy Oei, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Oei speak?
Dr. Oei and their clinical team can communicate with patients in the following languages:
English
What conditions does a Gastroenterologist like Dr. Oei typically treat?
As a Gastroenterologist, Dr. Oei 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. Oei. 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. Learn more about our claims-based healthcare methodology.
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:
- Abdominal Pain
- Stomach Ache
- Belly Pain
- Stomach Pain
ICD-10 Codes:
- R109: Unspecified abdominal pain
Also known as:
- Cirrhosis
- Liver scarring
- End-stage liver disease
- Chronic liver failure
ICD-10 Codes:
- K7460: Unspecified cirrhosis of liver
Also known as:
- Diarrhea
- Loose stools
- Runny poop
- Frequent bowel movements
ICD-10 Codes:
- R197: Diarrhea, unspecified
What procedures does a Gastroenterologist like Dr. Oei typically perform?
As a Gastroenterologist, Dr. Oei performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Oei. 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. Learn more about our claims-based healthcare methodology.
Also known as:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
CPT Codes:
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
Also known as:
- Diagnostic Upper Endoscopy with Biopsy
- Esophagus Widening Procedure (Endoscopic)
- EGD with Esophageal Balloon Dilation
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
- Esophageal Dilation
- EGD with Dilation
- Upper Endoscopy with Widening
- Upper Endoscopy with Esophageal Dilation
- Flexible Esophagoscopy with Balloon
- EGD with Balloon Widening
CPT Codes:
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 43248: Esophagogastroduodenoscopy, flexible, transoral; with insertion of guide wire followed by passage of dilator(s) through esophagus over guide wire
- 43249: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic balloon dilation of esophagus (less than 30 mm diameter)
Also known as:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Does Dr. Oei accept my insurance?
Dr. Oei accepts most major insurance plans. Important: Please call our office at (909) 427-3910 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Oei accept in Fontana, CA?
Dr. Oei in Fontana, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Apex Healthcare
Centene Corporation
Heritage Health
Inland Faculty Medical Group, Inc
Kaiser Permanente
Medicare
Other Health Care Provider
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Oei's office located?
What is Dr. Oei's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Oei's National Provider Identifier (NPI) number is 1033286844.
What common questions do patients ask about Dr. Oei?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Oei
What is Dr. Tommy Oei's specialty?
Dr. Oei is a Gastroenterologist near Fontana, CA.
What does a Gastroenterologist do?
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.
Is this Dr. Tommy Oei affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Oei is affiliated with Kaiser Permanente Fontana Medical Center, Ucla Santa Monica Medical Center, Kaiser Permanente Baldwin Park Medical Center, Ronald Reagan Ucla Medical Center, Kaiser Permanente Riverside Medical Center which are a Castle Connolly Top Hospitals. 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
When to see a Gastroenterologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Gastroenterologist. Explore 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 Tommy Oei accepting new patients in Fontana, CA?
Yes, Dr. Tommy Oei is accepting new patients at this time.
Does Dr. Tommy Oei offer online booking?
Please contact Dr. Oei's office at (909) 427-3910 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Tommy Oei?
Please contact Dr. Oei's office at (909) 427-3910 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Tommy Oei have?
Dr. Tommy Oei is certified by the American Board of Internal Medicine.
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