The 20 Best Peptic Ulcer Doctors Near Me in Ontario, CA

Find the Top Peptic Ulcer Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 136 doctor with experience in Peptic Ulcer near Ontario, CA. Of these, 119 are Experienced, 14 are Advanced and 3 are Distinguished.

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136 providers found
    Distinguished in Peptic Ulcer

    Waleed A. Alhazzani
    Distinguished in Peptic Ulcer

    Waleed A. Alhazzani
    Hamilton, ON, CA 

    Waleed Alhazzani practices practicing medicine in Hamilton, Canada. Mr. Alhazzani is rated as a Distinguished expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses Peptic Ulcer, Gastrointestinal Bleeding, Acute Respiratory Distress Syndrome (ARDS), Thrombectomy, and Aortic Valve Replacement.

    Distinguished in Peptic Ulcer

    Richard H. Hunt
    Distinguished in Peptic Ulcer

    Richard H. Hunt
    Hamilton, ON, CA 

    Richard Hunt practices practicing medicine in Hamilton, Canada. Mr. Hunt is rated as a Distinguished expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Peptic Ulcer, Helicobacter Pylori Infection, Esophagitis, and Gastroesophageal Reflux Disease (GERD).

    Distinguished in Peptic Ulcer

    Paul M. Moayyedi
    Distinguished in Peptic Ulcer

    Paul M. Moayyedi
    Hamilton, ON, CA 

    Paul Moayyedi practices practicing medicine in Hamilton, Canada. Mr. Moayyedi is rated as a Distinguished expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 19 other conditions, according to our data. His clinical expertise encompasses Indigestion, Irritable Bowel Syndrome (IBS), Viral Gastroenteritis, Endoscopy, and Colonoscopy.

    Learn about our expert tiers
    Advanced in Peptic Ulcer

    John G. Muscedere
    Advanced in Peptic Ulcer

    John G. Muscedere
    Kingston, ON, CA 

    John Muscedere practices practicing medicine in Kingston, Canada. Mr. Muscedere is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Pneumonia, Delirium, Hospital-Acquired Pneumonia, and Gastrointestinal Bleeding.

    Advanced in Peptic Ulcer

    Grigorios I. Leontiadis
    Advanced in Peptic Ulcer

    Grigorios I. Leontiadis
    Hamilton, ON, CA 

    Grigorios Leontiadis practices practicing medicine in Hamilton, Canada. Leontiadis is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. They are also highly rated in 7 other conditions, according to our data. Their clinical expertise encompasses Gastrointestinal Bleeding, Peptic Ulcer, Hereditary Pancreatitis, Endoscopy, and Colonoscopy.

    Advanced in Peptic Ulcer

    Gordon H. Guyatt
    Advanced in Peptic Ulcer

    Gordon H. Guyatt
    1Department Of Psychiatry And Behavioural Neuroscience, 100 West 5th Street, 
    Hamilton, ON, CA 

    Gordon Guyatt practices practicing medicine in Hamilton, Canada. Mr. Guyatt is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 33 other conditions, according to our data. His clinical expertise encompasses Venous Thromboembolism (VTE), Chronic Pain, Gastrointestinal Bleeding, Lithotripsy, and Thrombectomy.

    Advanced in Peptic Ulcer

    Dr. Scott Gmora
    General Surgery
    Advanced in Peptic Ulcer

    Dr. Scott Gmora
    General Surgery
    50 Charlton Ave East, G836, 
    Hamilton, ON, CA 
    905-522-1155
    Languages Spoken:
    English

    Scott Gmora is a General Surgeon practicing medicine in Hamilton, Canada. Dr. Gmora is rated as an Advanced provider by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Peptic Ulcer, Obesity, Gastric Bypass, and Sleeve Gastrectomy.

    Advanced in Peptic Ulcer

    Allan E. Okrainec
    Advanced in Peptic Ulcer

    Allan E. Okrainec
    Toronto, ON, CA 

    Allan Okrainec practices practicing medicine in Toronto, Canada. Mr. Okrainec is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Obesity, Hernia, Peptic Ulcer, Endoscopy, and Gastric Bypass.

    Advanced in Peptic Ulcer

    Dennis G. Hong
    Advanced in Peptic Ulcer

    Dennis G. Hong
    Hamilton, ON, CA 

    Dennis Hong practices practicing medicine in Hamilton, Canada. Mr. Hong is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 9 other conditions, according to our data. His clinical expertise encompasses Obesity, Peptic Ulcer, Diverticular Disease, Gastric Bypass, and Ileostomy.

    Advanced in Peptic Ulcer

    Mehran Anvari
    Advanced in Peptic Ulcer

    Mehran Anvari
    St. Joseph's Hospital, 
    Hamilton, ON, CA 

    Mehran Anvari practices practicing medicine in Hamilton, Canada. Mr. Anvari is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Obesity, Peptic Ulcer, Vitamin D Deficiency, Gastric Bypass, and Gastrectomy.

    Advanced in Peptic Ulcer

    Yuhong C. Yuan
    Advanced in Peptic Ulcer

    Yuhong C. Yuan
    London, ON, CA 

    Yuhong Yuan practices practicing medicine in London, Canada. Yuan is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. They are also highly rated in 16 other conditions, according to our data. Their clinical expertise encompasses Viral Gastroenteritis, Esophagitis, Hereditary Pancreatitis, Ileostomy, and Endoscopy.

    Advanced in Peptic Ulcer

    Joanna C. Dionne
    Advanced in Peptic Ulcer

    Joanna C. Dionne
    Hamilton, ON, CA 

    Joanna Dionne practices practicing medicine in Hamilton, Canada. Ms. Dionne is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. She is also highly rated in 5 other conditions, according to our data. Her clinical expertise encompasses Gastrointestinal Bleeding, Diarrhea, Peptic Ulcer, Liver Failure, and Endoscopy.

    Advanced in Peptic Ulcer

    Simon M. Dong
    Advanced in Peptic Ulcer

    Simon M. Dong
    Ottawa, ON, CA 

    Simon Dong practices practicing medicine in Ottawa, Canada. Dong is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. They are also highly rated in 1 other condition, according to our data. Their clinical expertise encompasses Peptic Ulcer and Helicobacter Pylori Infection.

    Advanced in Peptic Ulcer

    Shane W. English
    Advanced in Peptic Ulcer

    Shane W. English
    Ottawa, ON, CA 

    Shane English practices practicing medicine in Ottawa, Canada. Mr. English is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 7 other conditions, according to our data. His clinical expertise encompasses Subarachnoid Hemorrhage, Gastrointestinal Bleeding, Pneumonia, Peptic Ulcer, and Kidney Transplant.

    Advanced in Peptic Ulcer

    Nicole L. Zytaruk
    Advanced in Peptic Ulcer

    Nicole L. Zytaruk
    Hamilton, ON, CA 

    Nicole Zytaruk practices practicing medicine in Hamilton, Canada. Ms. Zytaruk is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. She is also highly rated in 3 other conditions, according to our data. Her clinical expertise encompasses Gastrointestinal Bleeding, Toxic Megacolon, Peptic Ulcer, and Pneumonia.

    Advanced in Peptic Ulcer

    Bram Rochwerg
    Advanced in Peptic Ulcer

    Bram Rochwerg
    Box 211, 711 Concession St, 
    Hamilton, ON, CA 

    Bram Rochwerg practices practicing medicine in Hamilton, Canada. Mr. Rochwerg is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 15 other conditions, according to our data. His clinical expertise encompasses Sepsis, Acute Respiratory Distress Syndrome (ARDS), COVID-19, Thrombectomy, and Coronary Artery Bypass Graft (CABG).

    Advanced in Peptic Ulcer

    Mario Musella
    Advanced in Peptic Ulcer

    Mario Musella
    MGB/OAGB Club, 
    Toronto, ON, CA 

    Mario Musella practices practicing medicine in Toronto, Canada. Mr. Musella is rated as an Advanced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Obesity, Hiatal Hernia, Gastroesophageal Reflux Disease (GERD), Gastric Bypass, and Sleeve Gastrectomy.

    Experienced in Peptic Ulcer

    Joel D. Katz
    Experienced in Peptic Ulcer

    Joel D. Katz
    Toronto, ON, CA 

    Joel Katz practices practicing medicine in Toronto, Canada. Mr. Katz is rated as an Experienced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Acute Pain, Chronic Pain, Phantom Limb Pain, Hepatectomy, and Knee Replacement.

    Experienced in Peptic Ulcer

    John K. Marshall
    Experienced in Peptic Ulcer

    John K. Marshall
    Hamilton, ON, CA 

    John Marshall practices practicing medicine in Hamilton, Canada. Mr. Marshall is rated as an Experienced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 15 other conditions, according to our data. His clinical expertise encompasses Viral Gastroenteritis, Hemorrhagic Proctocolitis, Crohn's Disease, Colonoscopy, and Endoscopy.

    Experienced in Peptic Ulcer

    Salim M. Yusuf
    Experienced in Peptic Ulcer

    Salim M. Yusuf
    30 Birge St, 
    Hamilton, ON, CA 

    Salim Yusuf practices practicing medicine in Hamilton, Canada. Mr. Yusuf is rated as an Experienced expert by MediFind in the treatment of Peptic Ulcer. He is also highly rated in 23 other conditions, according to our data. His clinical expertise encompasses Atrial Fibrillation, Stroke, Heart Attack, Heart Bypass Surgery, and Coronary Artery Bypass Graft (CABG).

    While we make every effort to provide the best results possible, data is currently limited outside of the United States. Doctors listed may include both clinicians and researchers, and individuals relocate frequently. We recommend contacting doctors directly to confirm their location and areas of focus. Contact information is provided when available. Learn more about our expert tiers.
    Showing 1-20 of 136

    Last Updated: 04/28/2026

    What is the definition of Peptic Ulcer?

    A peptic ulcer is an open sore or raw area in the lining of the stomach (gastric ulcer) or in the first part of the small intestine (duodenal ulcer).

    There are two types of peptic ulcers:

    • Gastric ulcer -- occurs in the stomach
    • Duodenal ulcer -- occurs in the first part of the small intestine

    When should I see a Peptic Ulcer doctor in Ontario, CA?

    There are various reasons why you may want to see a specialist, such as: 

    • Your primary care provider recommends it. 
    • Your condition requires expert knowledge and specialized care. 
    • Your symptoms persist or worsen despite treatment. 
    • You need specialized testing or procedures. 
    • You want a second opinion.  

    What should I consider when choosing a Peptic Ulcer doctor in Ontario, CA?

    It’s important to see a provider with expertise in your specific condition. Each provider profile in MediFind’s doctor database includes information on which conditions they treat, years of experience, research contributions, languages spoken, insurance plans accepted, and more.  

    How do I find the best Peptic Ulcer doctor in Ontario, CA?

    You can find a Peptic Ulcer doctor in any of the 10 largest U.S. cities by clicking below:

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    How does MediFind rank Peptic Ulcer doctors in Ontario, CA?

    MediFind’s rankings are based on a variety of data sources, such as the number of articles a doctor has published in medical journals, participation in clinical trials and industry conferences, as well as the number of patients that provider sees for a given condition. Note that MediFind’s provider database is not based on user reviews, and providers do not pay to be included in the database. 

    What types of insurance are accepted by Peptic Ulcer doctors in Ontario, CA?

    Most profiles in MediFind’s doctor database include a list of insurance plans accepted by that provider. However, it’s a good idea to contact the provider’s office to make sure they still accept your insurance, then doublecheck by contacting your insurance plan to confirm they’re in network. 

    How can I book an appointment online with a Peptic Ulcer doctor in Ontario, CA?

    MediFind offers direct scheduling for certain providers using the “Request Appointment” button on that provider’s profile. If the schedule option is not available for a provider, tap the red “Show Phone Number” button on their profile to get their contact information. If you prefer to find providers who offer online scheduling, select “Schedules online” under the “Availability” category of the filter feature on the left side of the Peptic Ulcer doctor search results page. 

    Why is it important to get a second opinion from a different Peptic Ulcer doctor?

    Second opinions are an opportunity to confirm a diagnosis and its root cause, learn about alternative treatment options, or simply gain peace of mind. Many people, especially those with serious diagnoses, get second opinions so they can understand all their options and make informed decisions, so don’t hesitate to get one if you have any doubts or need more information or clarification regarding your care. Note that some insurance plans require second opinions, while others don’t cover second opinions, so be sure to confirm with your insurance provider first.   

    How can I prepare for my appointment with a Peptic Ulcer doctor in Ontario, CA?

    Prepare for your appointment by gathering the following items: 

    • Copies of medical records (dating back at least one year) 
    • Your medical history, including illnesses, medical conditions, surgeries, and other doctors you see 
    • Family history of disease 
    • List of current prescription drugs, over-the-counter medicines, vitamins, and herbal remedies or supplements including names and doses 
    • Allergies to medications, food, latex, insects, etc.  
    • List of questions and concerns 
    • Your insurance card 

    You might also contact the provider’s office to see if they offer transportation or childcare services or if you’re allowed to bring a loved one for support or to take notes during your visit. 

    What questions should I ask my Peptic Ulcer doctor?

    Here are some sample questions: 

    • Can you explain in simple terms what this condition is and how it’s treated? 
    • What symptoms or side effects should I watch for? 
    • What tests will be involved, and when can I expect results? 
    • Are there other specialists I need to see? 
    • What’s the best way to reach you if I have follow-up questions? 

    How can I learn about the latest clinical trials and research advances my Peptic Ulcer doctor may know about?

    MediFind’s Clinical Trials tool asks you a series of questions to help you narrow down your search by health condition, age, gender, location, how far you’re willing to travel, and more. Each question you answer filters down the number of trials until you find the ones that are most relevant to you. 

    MediFind’s Latest Advances tool features summaries of recent articles published in medical journals. We use cutting-edge technology to scour medical publication databases for the latest research advancements on any given condition, then we simplify this information in a way that’s useful and easy to understand. 

    Can I filter my search to show male or female Peptic Ulcer doctors in Ontario, CA?

    Look for the filter feature on the left side of the Peptic Ulcer doctor search results page. Select “Female” or “Male” under the “Gender” category to search for female or male providers exclusively. If the “Any” option is selected, it will pull results for both male and female providers. 

    Can I filter my search to find a Peptic Ulcer doctor that offers video calls?

    Look for the filter feature on the left-side of the Peptic Ulcer doctor search results page. Select “Offers telehealth visits” under the Availability category to search for providers who offer virtual appointments (video calls). 

    Reviewed on: 11/11/24  

    By: MediFind Medical Staff 

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