The 20 Best Hashimoto Thyroiditis Doctors Near Me in Fullerton, CA

Find the Top Hashimoto Thyroiditis Experts and Specialists

The 20 Best Hashimoto Thyroiditis Doctors near Fullerton, CA

Last Updated: 02/22/2026

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MediFind found 87 doctor with experience in Hashimoto Thyroiditis near Fullerton, CA. Of these, 77 are Experienced, 8 are Advanced and 1 are Distinguished.

Location
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87 providers found
    Distinguished in Hashimoto Thyroiditis
    Endocrinology
    Distinguished in Hashimoto Thyroiditis
    Endocrinology
    100 East Valencia Mesa Drive, Suite 105, 
    Fullerton, CA 
     (1.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    John Gilbert is an Endocrinologist in Fullerton, California. Dr. Gilbert is rated as a Distinguished provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Type 2 Diabetes (T2D), Hashimoto Thyroiditis, Thyroid Nodule, and Obesity in Children. Dr. Gilbert is currently accepting new patients.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology
    100 East Valencia Mesa Drive, Suite 105, 
    Fullerton, CA 
     (1.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jason Ling is an Endocrinologist in Fullerton, California. Dr. Ling is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Postmenopausal Osteoporosis, Osteoporosis, Type 2 Diabetes (T2D), and Osteopenia. Dr. Ling is currently accepting new patients.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology
    100 East Valencia Mesa Drive, Suite 105, 
    Fullerton, CA 
     (1.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Bradley Neutel is an Endocrinologist in Fullerton, California. Dr. Neutel is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Pituitary Tumor, Necrotizing Myopathy (NM), Type 2 Diabetes (T2D), and Thyroid Nodule. Dr. Neutel is currently accepting new patients.

    Learn about our expert tiers
    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    St. Jude Heritage Fullerton-Endocrinology

    100 E Valencia Mesa Dr Ste 105, 
    Fullerton, CA 
     (2.2 miles away)
    Languages Spoken:
    English

    Michael Kuo is an Endocrinologist in Fullerton, California. Dr. Kuo is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Empty Sella Syndrome, Thyroid Nodule, Postmenopausal Osteoporosis, and Osteoporosis.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    Office

    100 E Valencia Mesa Dr Ste 105, 
    Fullerton, CA 
     (2.2 miles away)
    Languages Spoken:
    English

    Serhat Aytug is an Endocrinologist in Fullerton, California. Dr. Aytug is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Pituitary Tumor, Type 2 Diabetes (T2D), Thyroid Nodule, and Prolactinoma.

    Advanced in Hashimoto Thyroiditis
    Endocrinology
    Advanced in Hashimoto Thyroiditis
    Endocrinology
    4300 Rose Drive, Suite G, 
    Yorba Linda, CA 
     (5.2 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Becky Muldoon is an Endocrinologist in Yorba Linda, California. Dr. Muldoon has been practicing medicine for over 17 years and is rated as an Advanced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Type 2 Diabetes (T2D), Thyroid Nodule, Hypothyroidism, and Hashimoto Thyroiditis. Dr. Muldoon is currently accepting new patients.

    Michael Tran
    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    Southern California Endocrine Medical Group PMC

    1310 W Stewart Dr Ste 215, 
    Orange, CA 
     (7.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Michael Tran is an Endocrinologist in Orange, California. Dr. Tran is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Type 2 Diabetes (T2D), Thyroid Storm, Diabetic Nephropathy, and Hyperthyroidism.

    Experienced in Hashimoto Thyroiditis
    Internal Medicine
    Experienced in Hashimoto Thyroiditis
    Internal Medicine
    2141 North Harbor Boulevard, Suite 25000, 
    Fullerton, CA 
     (2.2 miles away)
    Languages Spoken:
    English

    Bradley Borsari is a primary care provider, practicing in Internal Medicine in Fullerton, California. Dr. Borsari is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Autoerythrocyte Sensitivity, Purpura, Gardner-Diamond Syndrome, and Postmenopausal Osteoporosis.

    Experienced in Hashimoto Thyroiditis
    Internal Medicine
    Experienced in Hashimoto Thyroiditis
    Internal Medicine
    2141 North Harbor Boulevard, Suite 25000, 
    Fullerton, CA 
     (2.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Leo Garcia is a primary care provider, practicing in Internal Medicine in Fullerton, California. Dr. Garcia is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are High Cholesterol, Sitosterolemia, Chronic Cough, and Vitamin D Deficiency.

    Experienced in Hashimoto Thyroiditis
    Endocrinology | Internal Medicine
    Experienced in Hashimoto Thyroiditis
    Endocrinology | Internal Medicine

    Optum - Euclid

    925 S Euclid St, 
    Anaheim, CA 
     (3.7 miles away)
    Experience:
    15+ years
    Languages Spoken:
    English
    Offers Telehealth

    Yana Stolyarov is an Internal Medicine specialist and an Endocrinologist in Anaheim, California. Dr. Stolyarov has been practicing medicine for over 15 years and is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Hirsutism in Women, Type 2 Diabetes (T2D), Graves Disease, and Hashimoto Thyroiditis.

    Experienced in Hashimoto Thyroiditis
    Family Medicine
    Experienced in Hashimoto Thyroiditis
    Family Medicine

    Central City Community Health Center Inc

    2237 W Ball Rd, 
    Anaheim, CA 
     (4.2 miles away)
    Experience:
    39+ years
    Languages Spoken:
    English

    Hung Doan is a primary care provider, practicing in Family Medicine in Anaheim, California. Dr. Doan has been practicing medicine for over 39 years and is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Obesity in Children, High Cholesterol, Obesity, and Type 2 Diabetes (T2D).

    Experienced in Hashimoto Thyroiditis
    Family Medicine
    Experienced in Hashimoto Thyroiditis
    Family Medicine
    955 West Imperial Highway, Suite 200, 
    Brea, CA 
     (4.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Angelia Sidarta is a primary care provider, practicing in Family Medicine in Brea, California. Dr. Sidarta is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Familial Hypertriglyceridemia, Lesch-Nyhan Syndrome, Osteomyelitis in Children, and Familial Combined Hyperlipidemia. Dr. Sidarta is currently accepting new patients.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    UCI Health

    101 The City Dr S, 
    Orange, CA 
     (6.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Bogi Andersen is an Endocrinologist in Orange, California. Dr. Andersen is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Hashimoto Thyroiditis, Triple A Syndrome, Adrenal Insufficiency Pediatric, and Type 2 Diabetes (T2D).

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    UCI Health

    101 The City Dr S, 
    Orange, CA 
     (6.0 miles away)
    Languages Spoken:
    English

    Yung-in Choi is an Endocrinologist in Orange, California. Dr. Choi is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Thyroid Nodule, Postmenopausal Osteoporosis, Type 2 Diabetes (T2D), and Maturity Onset Diabetes of the Young.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology
    1310 West Stewart Drive, Suite 610, 
    Orange, CA 
     (6.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Ivy-joan Madu is an Endocrinologist in Orange, California. Dr. Madu is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Type 2 Diabetes (T2D), Obesity in Children, Hypothyroidism, and Thyroid Nodule. Dr. Madu is currently accepting new patients.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    Southern California Permanente Medical Group

    5475 E La Palma Ave, 
    Anaheim, CA 
     (7.4 miles away)
    Languages Spoken:
    English

    Mona Roy is an Endocrinologist in Anaheim, California. Dr. Roy is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Familial Hyperthyroidism due to Mutations in TSH Receptor, Thyroid Hormone Plasma Membrane Transport Defect, Generalized Resistance to Thyroid Hormone, and Thyroid Storm.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology
    9191 Westminster Avenue, Suite 207, 
    Garden Grove, CA 
     (8.0 miles away)
    Experience:
    44+ years
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Ole Opgaard is an Endocrinologist in Garden Grove, California. Dr. Opgaard has been practicing medicine for over 44 years and is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. His top areas of expertise are Type 2 Diabetes (T2D), Hyperthyroidism, Thyroid Storm, and Peripheral Neuropathy. Dr. Opgaard is currently accepting new patients.

    Experienced in Hashimoto Thyroiditis
    Endocrinology
    Experienced in Hashimoto Thyroiditis
    Endocrinology

    PIH Health Physicians

    12400 Bloomfield Ave, 
    Santa Fe Springs, CA 
     (8.7 miles away)
    Languages Spoken:
    English

    Ghasak Mahmood is an Endocrinologist in Santa Fe Springs, California. Dr. Mahmood is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Type 2 Diabetes (T2D), Thyroid Nodule, Obesity in Children, and Hyperparathyroidism.

    Experienced in Hashimoto Thyroiditis
    Experienced in Hashimoto Thyroiditis
    2501 East Chapman Avenue, Suite 203, 
    Orange, CA 
     (8.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Maruja Arjonilla is an Endocrinologist in Orange, California. Dr. Arjonilla is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Type 2 Diabetes (T2D), Diabetic Hyperglycemic Hyperosmolar Syndrome, Hashimoto Thyroiditis, Hypothyroidism, and Orchiectomy. Dr. Arjonilla is currently accepting new patients.

    Experienced in Hashimoto Thyroiditis
    Experienced in Hashimoto Thyroiditis
    2501 East Chapman Avenue, Suite 203, 
    Orange, CA 
     (8.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Llanyee Liwanpo is an Endocrinologist in Orange, California. Dr. Liwanpo is rated as an Experienced provider by MediFind in the treatment of Hashimoto Thyroiditis. Her top areas of expertise are Type 2 Diabetes (T2D), Autosomal Dominant Hypocalcemia, Osteogenesis Imperfecta, and Diabetic Hyperglycemic Hyperosmolar Syndrome. Dr. Liwanpo is currently accepting new patients.

    Showing 1-20 of 87

    Last Updated: 02/22/2026

    What is the definition of Hashimoto Thyroiditis?

    Hashimoto's disease is a condition that affects the function of the thyroid, which is a butterfly-shaped gland in the lower neck. The thyroid makes hormones that help regulate a wide variety of critical body functions. For example, thyroid hormones influence growth and development, body temperature, heart rate, menstrual cycles, and weight. Hashimoto's disease is a form of chronic inflammation that can damage the thyroid, reducing its ability to produce hormones.

    When should I see a Hashimoto Thyroiditis doctor near Fullerton, 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 Hashimoto Thyroiditis doctor near Fullerton, 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 Hashimoto Thyroiditis doctors near Fullerton, 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 Hashimoto Thyroiditis doctors near Fullerton, 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 Hashimoto Thyroiditis doctor near Fullerton, 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 Hashimoto Thyroiditis doctor search results page. 

    Why is it important to get a second opinion from a different Hashimoto Thyroiditis 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 Hashimoto Thyroiditis doctor near Fullerton, 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 Hashimoto Thyroiditis 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 Hashimoto Thyroiditis 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 Hashimoto Thyroiditis doctors near Fullerton, CA?

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

    Look for the filter feature on the left-side of the Hashimoto Thyroiditis 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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