The 20 Best Diarrhea Doctors Near Me in Ontario, CA

Find the Top Diarrhea Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 279 doctor with experience in Diarrhea near Ontario, CA. Of these, 262 are Experienced, 14 are Advanced and 3 are Distinguished.

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279 providers found
    Distinguished in Diarrhea
    Distinguished in Diarrhea
    555 University Ave, 
    Toronto, ON, CA 

    Stephen Freedman practices practicing medicine in Toronto, Canada. Mr. Freedman is rated as a Distinguished expert by MediFind in the treatment of Diarrhea. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Dehydration, Diarrhea, Viral Gastroenteritis, and D-Plus Hemolytic Uremic Syndrome.

    Distinguished in Diarrhea
    Distinguished in Diarrhea
    Guelph, ON, CA 

    David Renaud practices practicing medicine in Guelph, Canada. Mr. Renaud is rated as a Distinguished expert by MediFind in the treatment of Diarrhea. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Diarrhea, Endometritis, Pelvic Inflammatory Disease, and Dehydration.

    Distinguished in Diarrhea
    Distinguished in Diarrhea
    Hamilton, ON, CA 

    Joanna Dionne practices practicing medicine in Hamilton, Canada. Ms. Dionne is rated as a Distinguished expert by MediFind in the treatment of Diarrhea. 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.

    Learn about our expert tiers
    Advanced in Diarrhea
    Advanced in Diarrhea
    Hamilton, ON, CA 

    Jeffrey Pernica practices practicing medicine in Hamilton, Canada. Mr. Pernica is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Diarrhea, Pneumonia, Shigellosis, E Coli Enteritis, and Appendectomy.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Hamilton, ON, CA 

    Paul Moayyedi practices practicing medicine in Hamilton, Canada. Mr. Moayyedi is rated as an Advanced expert by MediFind in the treatment of Diarrhea. 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.

    Advanced in Diarrhea
    Advanced in Diarrhea
    50 Stone Road, N1G 2W1, 
    Guelph, ON, CA 

    Luis Arroyo practices practicing medicine in Guelph, Canada. Mr. Arroyo is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Diarrhea, Parvovirus Antenatal Infection, Viral Gastroenteritis, and Colitis.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Hamilton, ON, CA 

    Premysl Bercik practices practicing medicine in Hamilton, Canada. Bercik is rated as an Advanced expert by MediFind in the treatment of Diarrhea. They are also highly rated in 9 other conditions, according to our data. Their clinical expertise encompasses Irritable Bowel Syndrome (IBS), Celiac Disease, Malabsorption, Vagotomy, and Colonoscopy.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Hamilton, ON, CA 

    Marek Smieja practices practicing medicine in Hamilton, Canada. Mr. Smieja is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Flu, HIV/AIDS, Pneumonia, and Diarrhea.

    Advanced in Diarrhea
    Advanced in Diarrhea
    399 Bathurst St, 
    Toronto, ON, CA 

    Andrea Boggild practices practicing medicine in Toronto, Canada. Ms. Boggild is rated as an Advanced expert by MediFind in the treatment of Diarrhea. She is also highly rated in 18 other conditions, according to our data. Her clinical expertise encompasses Leishmaniasis, Strongyloidiasis, Rhabditida Infections, and Leprosy.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Guelph, ON, CA 

    David Kelton practices practicing medicine in Guelph, Canada. Mr. Kelton is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Breast Infection, Diarrhea, Streptococcal Group B Infection, and Middle East Respiratory Syndrome (MERS).

    Advanced in Diarrhea
    Advanced in Diarrhea
    Toronto, ON, CA 

    Robert Bandsma practices practicing medicine in Toronto, Canada. Mr. Bandsma is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Malnutrition, Kwashiorkor, Diarrhea, Exocrine Pancreatic Insufficiency, and Liver Transplant.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Toronto, ON, CA 

    Aleixo Muise practices practicing medicine in Toronto, Canada. Muise is rated as an Advanced expert by MediFind in the treatment of Diarrhea. They are also highly rated in 8 other conditions, according to our data. Their clinical expertise encompasses Viral Gastroenteritis, Colitis, Crohn's Disease, Ileostomy, and Bone Marrow Transplant.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Toronto, ON, CA 

    Suzanne Schuh practices practicing medicine in Toronto, Canada. Ms. Schuh is rated as an Advanced expert by MediFind in the treatment of Diarrhea. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Bronchitis, Nasal Flaring, Appendicitis, Dehydration, and Appendectomy.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Toronto, ON, CA 

    Yaron Avitzur practices practicing medicine in Toronto, Canada. Mr. Avitzur is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Short Bowel Syndrome, Autoimmune Hepatitis, Intestinal Pseudo-Obstruction, Liver Transplant, and Gastrostomy.

    Advanced in Diarrhea
    Advanced in Diarrhea
    London, ON, CA 

    Naveen Poonai practices practicing medicine in London, Canada. Mr. Poonai is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Intussusception in Children, Diarrhea, Stridor, and Viral Gastroenteritis.

    Advanced in Diarrhea
    Advanced in Diarrhea
    Toronto, ON, CA 

    Maureen Trudeau practices practicing medicine in Toronto, Canada. Ms. Trudeau is rated as an Advanced expert by MediFind in the treatment of Diarrhea. She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Breast Cancer, Febrile Neutropenia, Agranulocytosis, Inflammatory Breast Cancer, and Mastectomy.

    Advanced in Diarrhea
    Advanced in Diarrhea
    401 Smyth Road, 
    Ottawa, ON, CA 

    John Mclennan practices practicing medicine in Ottawa, Canada. Mr. Mclennan is rated as an Advanced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Fetal Alcohol Syndrome (FAS), Diarrhea, Anemia, and Attention Deficit Hyperactivity Disorder (ADHD).

    Experienced in Diarrhea
    Experienced in Diarrhea
    Toronto, ON, CA 

    Philip Sherman practices practicing medicine in Toronto, Canada. Mr. Sherman is rated as an Experienced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Necrotizing Enterocolitis, Viral Gastroenteritis, Necrosis, and Vitamin D Deficiency.

    Experienced in Diarrhea
    Experienced in Diarrhea
    Ottawa, ON, CA 

    Scott Laurie practices practicing medicine in Ottawa, Canada. Mr. Laurie is rated as an Experienced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Lung Cancer, Non-Small Cell Lung Cancer (NSCLC), Mesothelioma, Small Cell Lung Cancer (SCLC), and Laryngectomy.

    Experienced in Diarrhea
    Experienced in Diarrhea
    55 Harbord St, M5S 2 W6, 
    Toronto, ON, CA 

    Jeffrey Lipton practices practicing medicine in Toronto, Canada. Mr. Lipton is rated as an Experienced expert by MediFind in the treatment of Diarrhea. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Chronic Myelogenous Leukemia (CML), Leukemia, Pure Red Cell Aplasia, Aase Syndrome, and Bone Marrow Transplant.

    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 279

    Last Updated: 04/28/2026

    What is the definition of Diarrhea?

    Diarrhea is when you pass loose or watery stool.

    When should I see a Diarrhea 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 Diarrhea 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 does MediFind rank Diarrhea 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 Diarrhea 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 Diarrhea 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 Diarrhea doctor search results page. 

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

    Look for the filter feature on the left side of the Diarrhea 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 Diarrhea doctor that offers video calls?

    Look for the filter feature on the left-side of the Diarrhea 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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