The 20 Best HER-2 Positive Breast Cancer Doctors Near Me in Ontario, CA

Find the Top HER-2 Positive Breast Cancer Experts and Specialists

Last Updated: 04/28/2026

Save doctors for later
Sign Up
Not sure about your diagnosis?
Check Your Symptoms
Already have a doctor?
Find A Second Opinion

MediFind found 66 doctor with experience in HER-2 Positive Breast Cancer near Ontario, CA. Of these, 56 are Experienced, 9 are Advanced and 1 are Distinguished.

Location
LocationClose
66 providers found
    Distinguished in HER-2 Positive Breast Cancer

    Christine B. Masley-Brezden
    Distinguished in HER-2 Positive Breast Cancer

    Christine B. Masley-Brezden
    Sinai Health System Mount Sinai Hospital, 
    Toronto, ON, CA 

    Christine Masley-Brezden practices practicing medicine in Toronto, Canada. Ms. Masley-Brezden is rated as a Distinguished expert by MediFind in the treatment of HER-2 Positive Breast Cancer. She is also highly rated in 5 other conditions, according to our data. Her clinical expertise encompasses Breast Cancer, HER-2 Positive Breast Cancer, Iron Deficiency Anemia, and Gastroesophageal Junction Cancer.

    Advanced in HER-2 Positive Breast Cancer

    Kathleen I. Pritchard
    Advanced in HER-2 Positive Breast Cancer

    Kathleen I. Pritchard
    2075 Bayview Ave, 
    Toronto, ON, CA 

    Kathleen Pritchard practices practicing medicine in Toronto, Canada. Pritchard is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. They are also highly rated in 4 other conditions, according to our data. Their clinical expertise encompasses Breast Cancer, Menopause, Amenorrhea, HER-2 Positive Breast Cancer, and Mastectomy.

    Advanced in HER-2 Positive Breast Cancer

    Sandeep R. Sehdev
    Advanced in HER-2 Positive Breast Cancer

    Sandeep R. Sehdev
    Ottawa, ON, CA 

    Sandeep Sehdev practices practicing medicine in Ottawa, Canada. Mr. Sehdev is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses HER-2 Positive Breast Cancer, Breast Cancer, Sudden Infant Death Syndrome (SIDS), and Febrile Neutropenia.

    Learn about our expert tiers
    Advanced in HER-2 Positive Breast Cancer

    David W. Cescon
    Advanced in HER-2 Positive Breast Cancer

    David W. Cescon
    101 College Street, M5G1L7, 
    Toronto, ON, CA 

    David Cescon practices practicing medicine in Toronto, Canada. Mr. Cescon is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Breast Cancer, Triple-Negative Breast Cancer, HER-2 Positive Breast Cancer, Tissue Biopsy, and Mastectomy.

    Advanced in HER-2 Positive Breast Cancer

    Husam M. Qadir-Abdel
    Advanced in HER-2 Positive Breast Cancer

    Husam M. Qadir-Abdel
    200 Elizabeth Street, 
    Toronto, ON, CA 

    Husam Qadir-Abdel practices practicing medicine in Toronto, Canada. Mr. Qadir-Abdel is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Atrial Fibrillation, Heart Failure, Breast Cancer, HER-2 Positive Breast Cancer, and Percutaneous Coronary Intervention (PCI).

    Advanced in HER-2 Positive Breast Cancer

    Jacques H. Raphael
    Advanced in HER-2 Positive Breast Cancer

    Jacques H. Raphael
    London, ON, CA 

    Jacques Raphael practices practicing medicine in London, Canada. Mr. Raphael is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Breast Cancer, Lung Cancer, HER-2 Positive Breast Cancer, Non-Small Cell Lung Cancer (NSCLC), and Bone Marrow Aspiration.

    Advanced in HER-2 Positive Breast Cancer

    Andrea F. Eisen
    Advanced in HER-2 Positive Breast Cancer

    Andrea F. Eisen
    Hamilton, ON, CA 

    Andrea Eisen practices practicing medicine in Hamilton, Canada. Ms. Eisen is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Breast Cancer, Ovarian Cancer, HER-2 Positive Breast Cancer, Oophorectomy, and Mastectomy.

    Advanced in HER-2 Positive Breast Cancer

    Kullervo H. Hynynen
    Advanced in HER-2 Positive Breast Cancer

    Kullervo H. Hynynen
    27 King's College Circle, M5S 1A1, 
    Toronto, ON, CA 

    Kullervo Hynynen practices practicing medicine in Toronto, Canada. Hynynen is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. They are also highly rated in 13 other conditions, according to our data. Their clinical expertise encompasses Essential Tremor, Alzheimer's Disease, Dementia, Thalamotomy, and Lithotripsy.

    Advanced in HER-2 Positive Breast Cancer

    Maureen E. Trudeau
    Advanced in HER-2 Positive Breast Cancer

    Maureen E. Trudeau
    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 HER-2 Positive Breast Cancer. 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 HER-2 Positive Breast Cancer

    Jason F. Moffat
    Advanced in HER-2 Positive Breast Cancer

    Jason F. Moffat
    160 College Street, 
    Toronto, ON, CA 

    Jason Moffat practices practicing medicine in Toronto, Canada. Mr. Moffat is rated as an Advanced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Brain Tumor, Glioblastoma, Glioma, and Astrocytoma.

    Experienced in HER-2 Positive Breast Cancer

    John M. Bartlett
    Experienced in HER-2 Positive Breast Cancer

    John M. Bartlett
    Toronto, ON, CA 

    John Bartlett practices practicing medicine in Toronto, Canada. Mr. Bartlett is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Breast Cancer, Breast Cancer in Men, HER-2 Positive Breast Cancer, Mastectomy, and Cataract Removal.

    Experienced in HER-2 Positive Breast Cancer

    Arvind S. Mer
    Experienced in HER-2 Positive Breast Cancer

    Arvind S. Mer
    Ottawa, ON, CA 

    Arvind Mer practices practicing medicine in Ottawa, Canada. Mr. Mer is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. His clinical expertise encompasses HER-2 Positive Breast Cancer, Acute Myeloid Leukemia (AML), Leukemia, and Breast Cancer.

    Experienced in HER-2 Positive Breast Cancer

    Allison L. Nixon
    Experienced in HER-2 Positive Breast Cancer

    Allison L. Nixon
    Toronto, ON, CA 

    Allison Nixon practices practicing medicine in Toronto, Canada. Nixon is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. Their clinical expertise encompasses HER-2 Positive Breast Cancer, Glioblastoma, and Astrocytoma.

    Experienced in HER-2 Positive Breast Cancer

    Azin Sayad
    Experienced in HER-2 Positive Breast Cancer

    Azin Sayad
    Toronto, ON, CA 

    Azin Sayad practices practicing medicine in Toronto, Canada. Sayad is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. Their clinical expertise encompasses HER-2 Positive Breast Cancer, Ovarian Cancer, and Breast Cancer.

    Experienced in HER-2 Positive Breast Cancer

    Kevin R. Brown
    Experienced in HER-2 Positive Breast Cancer

    Kevin R. Brown
    101 College Street, M5G 1×5, 
    Toronto, ON, CA 

    Kevin Brown practices practicing medicine in Toronto, Canada. Mr. Brown is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Glioma, Gliomatosis Cerebri, Medulloblastoma, and Brain Tumor.

    Experienced in HER-2 Positive Breast Cancer

    Bernd J. Wintersperger
    Experienced in HER-2 Positive Breast Cancer

    Bernd J. Wintersperger
    Toronto, ON, CA 

    Bernd Wintersperger practices practicing medicine in Toronto, Canada. Mr. Wintersperger is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Cardiomyopathy, Tetralogy of Fallot, Hypertrophic Cardiomyopathy (HCM), and HER-2 Positive Breast Cancer.

    Experienced in HER-2 Positive Breast Cancer

    Scott R. Berry
    Experienced in HER-2 Positive Breast Cancer

    Scott R. Berry
    2075 Bayview Ave, 
    Toronto, ON, CA 

    Scott Berry practices practicing medicine in Toronto, Canada. Mr. Berry is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Febrile Neutropenia, Pancreatic Cancer, Prostate Cancer, and Embolectomy.

    Experienced in HER-2 Positive Breast Cancer

    Eldad Zacksenhaus
    Experienced in HER-2 Positive Breast Cancer

    Eldad Zacksenhaus
    101 College Street, 
    Toronto, ON, CA 

    Eldad Zacksenhaus practices practicing medicine in Toronto, Canada. Mr. Zacksenhaus is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Acute Erythroid Leukemia (AEL), Pineoblastoma, Retinoblastoma, and Pineocytoma.

    Experienced in HER-2 Positive Breast Cancer

    Dakota Gustafson
    Experienced in HER-2 Positive Breast Cancer

    Dakota Gustafson
    Kingston, ON, CA 

    Dakota Gustafson practices practicing medicine in Kingston, Canada. Gustafson is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. They are also highly rated in 1 other condition, according to our data. Their clinical expertise encompasses Restrictive Cardiomyopathy (RCM), HER-2 Positive Breast Cancer, Cardiac Amyloidosis, and COVID-19.

    Experienced in HER-2 Positive Breast Cancer

    Caroline E. Munoz
    Experienced in HER-2 Positive Breast Cancer

    Caroline E. Munoz
    Toronto, ON, CA 

    Caroline Munoz practices practicing medicine in Toronto, Canada. Ms. Munoz is rated as an Experienced expert by MediFind in the treatment of HER-2 Positive Breast Cancer. Her clinical expertise encompasses Asthma, HER-2 Positive Breast Cancer, Atopic Dermatitis, and Hydronephrosis.

    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 66

    Last Updated: 04/28/2026

    What is the definition of HER-2 Positive Breast Cancer?

    HER2-positive breast cancer is a subtype of breast cancer that contains human epidermal growth factor receptor 2 (HER2), which is a protein that increases the growth of cancer cells. One out of five breast cancers contain the HER2 protein. Eighteen-to-twenty percent of invasive breast cancers are HER2-positive, which are more aggressive than other breast cancers, more likely to spread and relapse, and have resulted in a decreased survival rate in the past. While previously considered to be the most aggressive type of breast cancer, HER-2 positive breast cancer can now be treated with new biologic targeted therapies that have significantly improved outcomes. HER2-positive breast cancer is categorized in stages that take into account the diameter of the tumor, whether the cancer has spread to axillary (underarm) lymph nodes, and whether the cancer has spread to other organs, such as the liver, lung, brain and bone. Staging allows for treatment plans that target each patient’s individual breast cancer disease. Early breast cancers are staged based on the following criteria: Stage 0 – Ductal cancer in situ (DCIS), or a noninvasive breast cancer that is limited to the ducts. Stage I (A/B) – Cancer has spread from ducts to the surrounding fatty breast tissue. Tumor is smaller than 2 centimeters and has not spread to lymph nodes. Stage II (IIA/B) – Cancer has spread from ducts to the surrounding fatty breast tissue and may have spread to near lymph nodes. Tumor is between 2-to-5 centimeters wide. Advanced breast cancers are staged based on the following criteria: Stage III (IIIA/B) – The tumor is larger than 5 centimeters, cancer may or may not have spread to lymph nodes, or the tumor is smaller, and cancer has spread to lymph nodes. Stage IV – Metastatic Breast Cancer. Cancer has spread to lymph nodes and other parts of the body, with other organs affected, such as liver, lungs, brain, or bones.

    When should I see a HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctor in Ontario, CA?

    You can find a HER-2 Positive Breast Cancer doctor in any of the 10 largest U.S. cities by clicking below:

    HER-2 Positive Breast Cancer doctor near New York, NY
    HER-2 Positive Breast Cancer doctor near Los Angeles, CA
    HER-2 Positive Breast Cancer doctor near Chicago, IL
    HER-2 Positive Breast Cancer doctor near Houston, TX
    HER-2 Positive Breast Cancer doctor near Phoenix, AZ
    HER-2 Positive Breast Cancer doctor near Philadelphia, PA
    HER-2 Positive Breast Cancer doctor near Atlanta, GA
    HER-2 Positive Breast Cancer doctor near Boston, MA
    HER-2 Positive Breast Cancer doctor near Dallas, TX
    HER-2 Positive Breast Cancer doctor near San Jose, CA

    How does MediFind rank HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctor search results page. 

    Why is it important to get a second opinion from a different HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctors in Ontario, CA?

    Look for the filter feature on the left side of the HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctor that offers video calls?

    Look for the filter feature on the left-side of the HER-2 Positive Breast Cancer 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 

    Read more about our Content Policy.