The 20 Best Primary Immunodeficiency (PID) Doctors Near Me in Ontario, CA

Find the Top Primary Immunodeficiency (PID) Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 29 doctor with experience in Primary Immunodeficiency (PID) near Ontario, CA. Of these, 24 are Experienced, 4 are Advanced and 1 are Distinguished.

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29 providers found
    Distinguished in Primary Immunodeficiency (PID)

    Eyal Grunebaum
    Distinguished in Primary Immunodeficiency (PID)

    Eyal Grunebaum
    Toronto, ON, CA 

    Eyal Grunebaum practices practicing medicine in Toronto, Canada. Mr. Grunebaum is rated as a Distinguished expert by MediFind in the treatment of Primary Immunodeficiency (PID). He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Severe Combined Immunodeficiency (SCID), Adenosine Deaminase Deficiency, Purine Nucleoside Phosphorylase Deficiency, Primary Immunodeficiency (PID), and Bone Marrow Transplant.

    Advanced in Primary Immunodeficiency (PID)

    Nicola M. Wright
    Advanced in Primary Immunodeficiency (PID)

    Nicola M. Wright
    1145 Carling Ave, 
    Ottawa, ON, CA 

    Nicola Wright practices practicing medicine in Ottawa, Canada. Ms. Wright is rated as an Advanced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 3 other conditions, according to our data. Her clinical expertise encompasses Severe Combined Immunodeficiency (SCID), Infantile Neutropenia, Primary Immunodeficiency (PID), Splenectomy, and Bone Marrow Transplant.

    Advanced in Primary Immunodeficiency (PID)

    Chaim M. Roifman
    Advanced in Primary Immunodeficiency (PID)

    Chaim M. Roifman
    Toronto, ON, CA 

    Chaim Roifman practices practicing medicine in Toronto, Canada. Mr. Roifman is rated as an Advanced expert by MediFind in the treatment of Primary Immunodeficiency (PID). He is also highly rated in 9 other conditions, according to our data. His clinical expertise encompasses Severe Combined Immunodeficiency (SCID), ZAP70-Related Severe Combined Immunodeficiency, Primary Immunodeficiency (PID), Schwartz-Jampel Syndrome, and Bone Marrow Transplant.

    Learn about our expert tiers
    Advanced in Primary Immunodeficiency (PID)

    Julia M. Upton
    Advanced in Primary Immunodeficiency (PID)

    Julia M. Upton
    Toronto, ON, CA 

    Julia Upton practices practicing medicine in Toronto, Canada. Ms. Upton is rated as an Advanced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Anaphylaxis, Food Allergy, Familial Chronic Mucocutaneous Candidiasis, and Asthma.

    Advanced in Primary Immunodeficiency (PID)

    Caroline Kinnear
    Advanced in Primary Immunodeficiency (PID)

    Caroline Kinnear
    Toronto, ON, CA 

    Caroline Kinnear practices practicing medicine in Toronto, Canada. Ms. Kinnear is rated as an Advanced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 3 other conditions, according to our data. Her clinical expertise encompasses Supravalvular Aortic Stenosis, Primary Immunodeficiency (PID), Williams Syndrome, and Pulmonary Supravalvular Stenosis.

    Experienced in Primary Immunodeficiency (PID)

    Henry Y. Lu
    Experienced in Primary Immunodeficiency (PID)

    Henry Y. Lu
    1200 Montreal Rd, 
    Ottawa, ON, CA 

    Henry Lu practices practicing medicine in Ottawa, Canada. Mr. Lu is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). His clinical expertise encompasses Severe Combined Immunodeficiency (SCID), Primary Immunodeficiency (PID), Deafness Craniofacial Syndrome, and Osteochondroma.

    Experienced in Primary Immunodeficiency (PID)

    Paul K. Keith
    Experienced in Primary Immunodeficiency (PID)

    Paul K. Keith
    Hamilton, ON, CA 

    Paul Keith practices practicing medicine in Hamilton, Canada. Mr. Keith is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Angioedema, Hereditary Angioedema, Hives, and Allergic Rhinitis.

    Experienced in Primary Immunodeficiency (PID)

    Ruud J. Verstegen
    Experienced in Primary Immunodeficiency (PID)

    Ruud J. Verstegen
    Toronto, ON, CA 

    Ruud Verstegen practices practicing medicine in Toronto, Canada. Verstegen is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). They are also highly rated in 2 other conditions, according to our data. Their clinical expertise encompasses DRESS Syndrome, Down Syndrome, Juvenile Idiopathic Arthritis (JIA), and Primary Immunodeficiency (PID).

    Experienced in Primary Immunodeficiency (PID)

    Vy H. Kim
    Experienced in Primary Immunodeficiency (PID)

    Vy H. Kim
    Toronto, ON, CA 

    Vy Kim practices practicing medicine in Toronto, Canada. Ms. Kim is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Adenosine Deaminase Deficiency, Severe Combined Immunodeficiency (SCID), Primary Immunodeficiency (PID), Infantile Neutropenia, and Bone Marrow Transplant.

    Experienced in Primary Immunodeficiency (PID)

    Vy D. Kim
    Experienced in Primary Immunodeficiency (PID)

    Vy D. Kim
    Toronto, ON, CA 

    Vy Kim practices practicing medicine in Toronto, Canada. Ms. Kim is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). Her clinical expertise encompasses Severe Combined Immunodeficiency (SCID), Primary Immunodeficiency (PID), Secondary Immunodeficiency (SID), and Atopic Dermatitis.

    Experienced in Primary Immunodeficiency (PID)

    Robin J. Green
    Experienced in Primary Immunodeficiency (PID)

    Robin J. Green
    Toronto, ON, CA 

    Robin Green practices practicing medicine in Toronto, Canada. Green is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). They are also highly rated in 6 other conditions, according to our data. Their clinical expertise encompasses Systemic Lupus Erythematosus (SLE), Concussion, Bronchitis, and Pneumonia.

    Experienced in Primary Immunodeficiency (PID)

    Stephen D. Betschel
    Experienced in Primary Immunodeficiency (PID)

    Stephen D. Betschel
    St. Michael's Hospital, 
    Toronto, ON, CA 

    Stephen Betschel practices practicing medicine in Toronto, Canada. Mr. Betschel is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Angioedema, Hereditary Angioedema, Hives, and Common Variable Immune Deficiency.

    Experienced in Primary Immunodeficiency (PID)

    Linda Vong
    Experienced in Primary Immunodeficiency (PID)

    Linda Vong
    Toronto, ON, CA 

    Linda Vong practices practicing medicine in Toronto, Canada. Ms. Vong is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Vitamin D Deficiency, Severe Combined Immunodeficiency (SCID), Viral Gastroenteritis, and Colitis.

    Experienced in Primary Immunodeficiency (PID)

    Michaela Cada
    Experienced in Primary Immunodeficiency (PID)

    Michaela Cada
    Toronto, ON, CA 

    Michaela Cada practices practicing medicine in Toronto, Canada. Ms. Cada is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 8 other conditions, according to our data. Her clinical expertise encompasses Aase Syndrome, Infantile Neutropenia, Pure Red Cell Aplasia, Splenectomy, and Bone Marrow Transplant.

    Experienced in Primary Immunodeficiency (PID)

    Giacomo Grillo
    Experienced in Primary Immunodeficiency (PID)

    Giacomo Grillo
    Toronto, ON, CA 

    Giacomo Grillo practices practicing medicine in Toronto, Canada. Mr. Grillo is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses ICF Syndrome, Primary Immunodeficiency (PID), Prostate Cancer, and Familial Prostate Cancer.

    Experienced in Primary Immunodeficiency (PID)

    William H. Yang
    Experienced in Primary Immunodeficiency (PID)

    William H. Yang
    Ottawa, ON, CA 

    William Yang practices practicing medicine in Ottawa, Canada. Mr. Yang is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Angioedema, Hereditary Angioedema, Hives, and Asthma.

    Experienced in Primary Immunodeficiency (PID)

    Lucy Y. Duan
    Experienced in Primary Immunodeficiency (PID)

    Lucy Y. Duan
    Toronto, ON, CA 

    Lucy Duan practices practicing medicine in Toronto, Canada. Ms. Duan is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). Her clinical expertise encompasses Anaphylaxis, Primary Immunodeficiency (PID), and Grass Allergy.

    Experienced in Primary Immunodeficiency (PID)

    Daniele Merico
    Experienced in Primary Immunodeficiency (PID)

    Daniele Merico
    Toronto, ON, CA 

    Daniele Merico practices practicing medicine in Toronto, Canada. Ms. Merico is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Autism Spectrum Disorder, Obsessive-Compulsive Disorder (OCD), Attention Deficit Hyperactivity Disorder (ADHD), and Schizophrenia.

    Experienced in Primary Immunodeficiency (PID)

    Jo-anne Herbrick
    Experienced in Primary Immunodeficiency (PID)

    Jo-anne Herbrick
    Toronto, ON, CA 

    Jo-anne Herbrick practices practicing medicine in Toronto, Canada. Ms. Herbrick is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). Her clinical expertise encompasses Primary Immunodeficiency (PID).

    Experienced in Primary Immunodeficiency (PID)

    Patrick M. Brauer
    Experienced in Primary Immunodeficiency (PID)

    Patrick M. Brauer
    60 Leonard Ave, 
    Toronto, ON, CA 

    Patrick Brauer practices practicing medicine in Toronto, Canada. Mr. Brauer is rated as an Experienced expert by MediFind in the treatment of Primary Immunodeficiency (PID). His clinical expertise encompasses Primary Immunodeficiency (PID).

    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 29

    Last Updated: 04/28/2026

    When should I see a Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctor in Ontario, CA?

    You can find a Primary Immunodeficiency (PID) doctor in any of the 10 largest U.S. cities by clicking below:

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    How does MediFind rank Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctor search results page. 

    Why is it important to get a second opinion from a different Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctors in Ontario, CA?

    Look for the filter feature on the left side of the Primary Immunodeficiency (PID) 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 Primary Immunodeficiency (PID) doctor that offers video calls?

    Look for the filter feature on the left-side of the Primary Immunodeficiency (PID) 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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