The 20 Best L1 Syndrome Doctors Near Me in Ontario, CA

Find the Top L1 Syndrome Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 14 doctor with experience in L1 Syndrome near Ontario, CA. Of these, 11 are Experienced, 2 are Advanced and 1 are Distinguished.

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14 providers found
    Distinguished in L1 Syndrome

    Johann K. Hitzler
    Distinguished in L1 Syndrome

    Johann K. Hitzler
    555 University Avenue, 
    Toronto, ON, CA 

    Johann Hitzler practices practicing medicine in Toronto, Canada. Hitzler is rated as a Distinguished expert by MediFind in the treatment of L1 Syndrome. They are also highly rated in 6 other conditions, according to our data. Their clinical expertise encompasses Down Syndrome, L1 Syndrome, Acute Lymphoblastic Leukemia (ALL), Leukemia, and Bone Marrow Transplant.

    Advanced in L1 Syndrome

    James A. Whitlock
    Advanced in L1 Syndrome

    James A. Whitlock
    Toronto, ON, CA 

    James Whitlock practices practicing medicine in Toronto, Canada. Mr. Whitlock is rated as an Advanced expert by MediFind in the treatment of L1 Syndrome. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Langerhans Cell Histiocytosis, Acute Lymphoblastic Leukemia (ALL), Histiocytosis, and Reticulohistiocytoma.

    Advanced in L1 Syndrome

    Brenda J. Spiegler
    Advanced in L1 Syndrome

    Brenda J. Spiegler
    Toronto, ON, CA 

    Brenda Spiegler practices practicing medicine in Toronto, Canada. Ms. Spiegler is rated as an Advanced expert by MediFind in the treatment of L1 Syndrome. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses L1 Syndrome, Acute Lymphoblastic Leukemia (ALL), Medulloblastoma, Leukemia, and Bone Marrow Transplant.

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    Experienced in L1 Syndrome

    Serina Patel
    Experienced in L1 Syndrome

    Serina Patel
    London, ON, CA 

    Serina Patel practices practicing medicine in London, Canada. Ms. Patel is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. Her clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), L1 Syndrome, Dysfibrinogenemia, and Leukemia.

    Experienced in L1 Syndrome

    Rinku Sutradhar
    Experienced in L1 Syndrome

    Rinku Sutradhar
    155 College Street, 
    Toronto, ON, CA 

    Rinku Sutradhar practices practicing medicine in Toronto, Canada. Sutradhar is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. They are also highly rated in 12 other conditions, according to our data. Their clinical expertise encompasses Colorectal Cancer, Breast Cancer, Acute Lymphoblastic Leukemia (ALL), Mastectomy, and Colonoscopy.

    Experienced in L1 Syndrome

    Paul S. Gibson
    Experienced in L1 Syndrome

    Paul S. Gibson
    Hamilton, ON, CA 

    Paul Gibson practices practicing medicine in Hamilton, Canada. Mr. Gibson is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Infantile Neutropenia, Antiphospholipid Syndrome, L1 Syndrome, Acute Lymphoblastic Leukemia (ALL), and Bone Marrow Transplant.

    Experienced in L1 Syndrome

    Joerg A. Krueger
    Experienced in L1 Syndrome

    Joerg A. Krueger
    Toronto, ON, CA 

    Joerg Krueger practices practicing medicine in Toronto, Canada. Krueger is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. They are also highly rated in 8 other conditions, according to our data. Their clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), Hemophagocytic Lymphohistiocytosis, Osteopetrosis, Non-Langerhans-Cell Histiocytosis, and Bone Marrow Transplant.

    Experienced in L1 Syndrome

    Lillian Sung
    Experienced in L1 Syndrome

    Lillian Sung
    686 Bay Street, 
    Toronto, ON, CA 

    Lillian Sung practices practicing medicine in Toronto, Canada. Ms. Sung is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. She is also highly rated in 15 other conditions, according to our data. Her clinical expertise encompasses Febrile Neutropenia, Infantile Neutropenia, Agranulocytosis, Bone Marrow Transplant, and Bone Marrow Aspiration.

    Experienced in L1 Syndrome

    Laura Wheaton
    Experienced in L1 Syndrome

    Laura Wheaton
    Kingston, ON, CA 

    Laura Wheaton practices practicing medicine in Kingston, Canada. Ms. Wheaton is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. Her clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), L1 Syndrome, Lymphofollicular Hyperplasia, Leukemia, and Bone Marrow Aspiration.

    Experienced in L1 Syndrome

    Derek A. Stephens
    Experienced in L1 Syndrome

    Derek A. Stephens
    555 University Avenue, 
    Toronto, ON, CA 

    Derek Stephens practices practicing medicine in Toronto, Canada. Mr. Stephens is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Nasal Flaring, Bronchitis, Retropharyngeal Abscess, and Peters Anomaly.

    Experienced in L1 Syndrome

    Mylene Bassal
    Experienced in L1 Syndrome

    Mylene Bassal
    Ottawa, ON, CA 

    Mylene Bassal practices practicing medicine in Ottawa, Canada. Ms. Bassal is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), L1 Syndrome, Leukemia, and Doxorubicin-Induced Cardiomyopathy.

    Experienced in L1 Syndrome

    Jason D. Pole
    Experienced in L1 Syndrome

    Jason D. Pole
    155 College Street, 
    Toronto, ON, CA 

    Jason Pole practices practicing medicine in Toronto, Canada. Mr. Pole is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), Leukemia, Hodgkin Lymphoma, Thyroidectomy, and Bone Marrow Transplant.

    Experienced in L1 Syndrome

    Petros Pechlivanoglou
    Experienced in L1 Syndrome

    Petros Pechlivanoglou
    155 College St, M5T 3MG, 
    Toronto, ON, CA 

    Petros Pechlivanoglou practices practicing medicine in Toronto, Canada. Mr. Pechlivanoglou is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. His clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), Premature Infant, L1 Syndrome, Small Bowel Resection, and Lung Transplant.

    Experienced in L1 Syndrome

    Mary Shago
    Experienced in L1 Syndrome

    Mary Shago
    Toronto, ON, CA 

    Mary Shago practices practicing medicine in Toronto, Canada. Ms. Shago is rated as an Experienced expert by MediFind in the treatment of L1 Syndrome. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Acute Lymphoblastic Leukemia (ALL), Leukemia, Meier-Gorlin Syndrome, Mixed Gonadal Dysgenesis, 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 1-14 of 14

    Last Updated: 04/28/2026

    What is the definition of L1 Syndrome?

    L1 syndrome describes a group of conditions that primarily affect the nervous system and occur almost exclusively in males. These conditions vary in severity and include, from most severe to least, X-linked hydrocephalus with stenosis of the aqueduct of Sylvius (HSAS), MASA syndrome, spastic paraplegia type 1, and X-linked complicated corpus callosum agenesis.

    When should I see a L1 Syndrome 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 L1 Syndrome 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 L1 Syndrome doctor in Ontario, CA?

    You can find a L1 Syndrome doctor in any of the 10 largest U.S. cities by clicking below:

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    How does MediFind rank L1 Syndrome 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 L1 Syndrome 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 L1 Syndrome 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 L1 Syndrome doctor search results page. 

    Why is it important to get a second opinion from a different L1 Syndrome 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 L1 Syndrome 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 L1 Syndrome 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 L1 Syndrome 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 L1 Syndrome doctors in Ontario, CA?

    Look for the filter feature on the left side of the L1 Syndrome 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 L1 Syndrome doctor that offers video calls?

    Look for the filter feature on the left-side of the L1 Syndrome 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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