The 20 Best Gastrointestinal Stromal Tumor Doctors Near Me in Ontario, CA

Find the Top Gastrointestinal Stromal Tumor Experts and Specialists

Last Updated: 06/30/2026

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MediFind found 23 doctor with experience in Gastrointestinal Stromal Tumor near Ontario, CA. Of these, 21 are Experienced and 2 are Advanced.

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23 providers found
    Advanced in Gastrointestinal Stromal Tumor

    Albiruni A. Razak
    Advanced in Gastrointestinal Stromal Tumor

    Albiruni A. Razak
    Referral may be required
    Toronto, ON, CA 

    Albiruni Razak practices practicing medicine in Toronto, Canada. Razak is rated as an Advanced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. They are also highly rated in 2 other conditions, according to our data. Their clinical expertise encompasses Adult Soft Tissue Sarcoma, Gastrointestinal Stromal Tumor, Head and Neck Squamous Cell Carcinoma (HNSCC), and Undifferentiated Pleomorphic Sarcoma.

    Advanced in Gastrointestinal Stromal Tumor

    Allan E. Okrainec
    Advanced in Gastrointestinal Stromal Tumor

    Allan E. Okrainec
    Referral may be required
    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 Gastrointestinal Stromal Tumor. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Obesity, Hernia, Peptic Ulcer, Gastric Bypass, and Endoscopy.

    Experienced in Gastrointestinal Stromal Tumor

    Timothy R. Asmis
    Experienced in Gastrointestinal Stromal Tumor

    Timothy R. Asmis
    Referral may be required
    501 Smyth Road, 
    Ottawa, ON, CA 

    Timothy Asmis practices practicing medicine in Ottawa, Canada. Mr. Asmis is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Anal Cancer, Gastrointestinal Stromal Tumor, Pancreatic Cancer, and Colostomy.

    Learn about our expert tiers
    Experienced in Gastrointestinal Stromal Tumor

    Julie H. Hallet
    Experienced in Gastrointestinal Stromal Tumor

    Julie H. Hallet
    Referral may be required
    2075 Bayview Avenue, M4N 3M5, 
    Toronto, ON, CA 

    Julie Hallet practices practicing medicine in Toronto, Canada. Ms. Hallet is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. She is also highly rated in 14 other conditions, according to our data. Her clinical expertise encompasses Neuroendocrine Tumor, Pancreatic Islet Cell Tumor, Pancreatic Cancer, Hepatectomy, and Hepato-Pancreato-Biliary Surgery.

    Experienced in Gastrointestinal Stromal Tumor

    Fayez A. Quereshy
    Experienced in Gastrointestinal Stromal Tumor

    Fayez A. Quereshy
    Referral may be required
    Toronto, ON, CA 

    Fayez Quereshy practices practicing medicine in Toronto, Canada. Mr. Quereshy is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Gastrointestinal Stromal Tumor, Obesity, Ileostomy, and Endoscopy.

    Experienced in Gastrointestinal Stromal Tumor

    Rebecca A. Gladdy
    Experienced in Gastrointestinal Stromal Tumor

    Rebecca A. Gladdy
    Referral may be required
    Toronto, ON, CA 

    Rebecca Gladdy practices practicing medicine in Toronto, Canada. Ms. Gladdy is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Adult Soft Tissue Sarcoma, Desmoid Tumor, Fibromatosis, and Angiosarcoma.

    Experienced in Gastrointestinal Stromal Tumor

    Shailendra Verma
    Experienced in Gastrointestinal Stromal Tumor

    Shailendra Verma
    Referral may be required
    501 Smyth Road, 
    Ottawa, ON, CA 

    Shailendra Verma practices practicing medicine in Ottawa, Canada. Verma is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. They are also highly rated in 3 other conditions, according to our data. Their clinical expertise encompasses Breast Cancer, Febrile Neutropenia, Agranulocytosis, Gastrointestinal Stromal Tumor, and Mastectomy.

    Experienced in Gastrointestinal Stromal Tumor

    Klaudia M. Nowak
    Experienced in Gastrointestinal Stromal Tumor

    Klaudia M. Nowak
    Referral may be required
    Toronto, ON, CA 

    Klaudia Nowak practices practicing medicine in Toronto, Canada. Ms. Nowak is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. Her clinical expertise encompasses Gastrointestinal Stromal Tumor, Hepatic Hemangioma, Hemangioendothelioma, Sleeve Gastrectomy, and Gastrectomy.

    Experienced in Gastrointestinal Stromal Tumor

    Runjan Chetty
    Experienced in Gastrointestinal Stromal Tumor

    Runjan Chetty
    Referral may be required
    Toronto, ON, CA 

    Runjan Chetty practices practicing medicine in Toronto, Canada. Chetty is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. They are also highly rated in 1 other condition, according to our data. Their clinical expertise encompasses Colorectal Cancer, Appendix Cancer, Pancreatic Cancer, Sleeve Gastrectomy, and Endoscopy.

    Experienced in Gastrointestinal Stromal Tumor

    Arash Azin
    Experienced in Gastrointestinal Stromal Tumor

    Arash Azin
    Referral may be required
    Toronto, ON, CA 

    Arash Azin practices practicing medicine in Toronto, Canada. Mr. Azin is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Gangrene, Gastrointestinal Stromal Tumor, Ileostomy, and Colonoscopy.

    Experienced in Gastrointestinal Stromal Tumor

    Carol J. Swallow
    Experienced in Gastrointestinal Stromal Tumor

    Carol J. Swallow
    Referral may be required

    Mount Sinai Hospital, Sinai Health

    Toronto, ON, CA 

    Carol Swallow practices practicing medicine in Toronto, Canada. Ms. Swallow is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. She is also highly rated in 10 other conditions, according to our data. Her clinical expertise encompasses Adult Soft Tissue Sarcoma, Stomach Cancer, Liposarcoma, Gastrectomy, and Pancreaticoduodenectomy.

    Experienced in Gastrointestinal Stromal Tumor

    Ozgur Mete
    Experienced in Gastrointestinal Stromal Tumor

    Ozgur Mete
    Referral may be required
    200 Elizabeth Street, 
    Toronto, ON, CA 

    Ozgur Mete practices practicing medicine in Toronto, Canada. Mete is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. They are also highly rated in 30 other conditions, according to our data. Their clinical expertise encompasses Neuroendocrine Tumor, Pituitary Tumor, Hypothalamic Tumor, Thyroidectomy, and Parathyroidectomy.

    Experienced in Gastrointestinal Stromal Tumor

    Mario Musella
    Experienced in Gastrointestinal Stromal Tumor

    Mario Musella
    Referral may be required
    MGB/OAGB Club, 
    Toronto, ON, CA 

    Mario Musella practices practicing medicine in Toronto, Canada. Mr. Musella is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. He is also highly rated in 9 other conditions, according to our data. His clinical expertise encompasses Obesity, Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, Gastric Bypass, and Sleeve Gastrectomy.

    Experienced in Gastrointestinal Stromal Tumor

    Nasser I. Alqahtani
    Experienced in Gastrointestinal Stromal Tumor

    Nasser I. Alqahtani
    Referral may be required
    501 Smyth Road, 
    Ottawa, ON, CA 

    Nasser Alqahtani practices practicing medicine in Ottawa, Canada. Mr. Alqahtani is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. His clinical expertise encompasses Gastrointestinal Stromal Tumor, Breast Cancer, and Mastectomy.

    Experienced in Gastrointestinal Stromal Tumor

    Nisha Kanwar
    Experienced in Gastrointestinal Stromal Tumor

    Nisha Kanwar
    Referral may be required
    Toronto, ON, CA 

    Nisha Kanwar practices practicing medicine in Toronto, Canada. Ms. Kanwar is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Breast Cancer, Li-Fraumeni Syndrome, Cafe-Au-Lait Spots, Myeloproliferative Neoplasms (MPN), and Tissue Biopsy.

    Experienced in Gastrointestinal Stromal Tumor

    Seng Thipphavong
    Experienced in Gastrointestinal Stromal Tumor

    Seng Thipphavong
    Referral may be required
    Mount Sinai Hospital And Women's College Hospital, 610 University Ave, 3-957, 
    Toronto, ON, CA 

    Seng Thipphavong practices practicing medicine in Toronto, Canada. Mr. Thipphavong is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. His clinical expertise encompasses Liposarcoma, Hernia, Adult Soft Tissue Sarcoma, and Gastrointestinal Stromal Tumor.

    Experienced in Gastrointestinal Stromal Tumor

    David M. Malkin
    Experienced in Gastrointestinal Stromal Tumor

    David M. Malkin
    Referral may be required
    Toronto, ON, CA 

    David Malkin practices practicing medicine in Toronto, Canada. Mr. Malkin is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. He is also highly rated in 21 other conditions, according to our data. His clinical expertise encompasses Li-Fraumeni Syndrome, Cerebral Ventricle Cancer, Choroid Plexus Carcinoma, and Rhabdomyosarcoma.

    Experienced in Gastrointestinal Stromal Tumor

    Anita Villani
    Experienced in Gastrointestinal Stromal Tumor

    Anita Villani
    Referral may be required
    Toronto, ON, CA 

    Anita Villani practices practicing medicine in Toronto, Canada. Ms. Villani is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. She is also highly rated in 5 other conditions, according to our data. Her clinical expertise encompasses Li-Fraumeni Syndrome, DICER1 Syndrome, Turcot Syndrome, and Rommen Mueller Sybert Syndrome.

    Experienced in Gastrointestinal Stromal Tumor

    Adam Shlien
    Experienced in Gastrointestinal Stromal Tumor

    Adam Shlien
    Referral may be required
    Toronto, ON, CA 

    Adam Shlien practices practicing medicine in Toronto, Canada. Mr. Shlien is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Li-Fraumeni Syndrome, Choroid Plexus Carcinoma, Cerebral Ventricle Cancer, and Adult Soft Tissue Sarcoma.

    Experienced in Gastrointestinal Stromal Tumor

    Awrad M. Nasralla
    Experienced in Gastrointestinal Stromal Tumor

    Awrad M. Nasralla
    Referral may be required
    Toronto, ON, CA 

    Awrad Nasralla practices practicing medicine in Toronto, Canada. Nasralla is rated as an Experienced expert by MediFind in the treatment of Gastrointestinal Stromal Tumor. Their clinical expertise encompasses Parapneumonic Pleural Effusion, Intussusception in Children, Empyema, and Fibromatosis.

    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 23

    Last Updated: 06/30/2026

    What is the definition of Gastrointestinal Stromal Tumor?

    A gastrointestinal stromal tumor (GIST) is a type of tumor that occurs in the gastrointestinal tract, most commonly in the stomach or small intestine. This type of tumor is thought to grow from specialized cells found in the gastrointestinal tract called interstitial cells of Cajal (ICCs) or precursors to these cells. Affected individuals can develop one or more tumors. GISTs are usually found in adults between ages 40 and 70; rarely, children and young adults develop this type of tumor.

    When should I see a Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor doctor in Ontario, CA?

    You can find a Gastrointestinal Stromal Tumor doctor in any of the 10 largest U.S. cities by clicking below:

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    How does MediFind rank Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor doctor search results page. 

    Why is it important to get a second opinion from a different Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor doctors in Ontario, CA?

    Look for the filter feature on the left side of the Gastrointestinal Stromal Tumor 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 Gastrointestinal Stromal Tumor doctor that offers video calls?

    Look for the filter feature on the left-side of the Gastrointestinal Stromal Tumor 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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