The 20 Best Congenital Hyperinsulinism Doctors Near Me in downey, CA

Find the Top Congenital Hyperinsulinism Experts and Specialists

Last Updated: 09/26/2026

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MediFind found 30 doctor with experience in Congenital Hyperinsulinism near downey, CA. Of these, 24 are Experienced, 5 are Advanced and 1 are Distinguished.

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30 providers found
    Experienced in Congenital Hyperinsulinism
    Internal Medicine
    Experienced in Congenital Hyperinsulinism
    Internal Medicine

    Downey Medical Center

    9333 Imperial Hwy, 
    Downey, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Gal Sadlik is a primary care provider, practicing in Internal Medicine in Downey, California. Dr. Sadlik is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. His clinical expertise encompasses Congenital Hyperinsulinism, Low Blood Sugar, Malignant Otitis Externa, Portal Hypertension, and Gastric Bypass. Dr. Sadlik is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Internal Medicine
    Experienced in Congenital Hyperinsulinism
    Internal Medicine

    Kaiser Permanente Orchard Medical Offices

    9449 E Imperial Highway, 
    Downey, CA 
     (1.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Ted Chen is a primary care provider, practicing in Internal Medicine in Downey, California. Dr. Chen is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. His clinical expertise encompasses Obesity, Abdominal Obesity Metabolic Syndrome, Type 2 Diabetes (T2D), and Osteomyelitis in Children. Dr. Chen is currently accepting new patients.

    Advanced in Congenital Hyperinsulinism
    Endocrinology
    Advanced in Congenital Hyperinsulinism
    Endocrinology
    Referral required

    Keck Hospital Of USC

    1500 San Pablo St, 
    Los Angeles, CA 
     (9.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Kathleen Page is an Endocrinologist practicing medicine in Los Angeles, California. Dr. Page is rated as an Advanced provider by MediFind in the treatment of Congenital Hyperinsulinism. She is also highly rated in 5 other conditions, according to our data. Her clinical expertise encompasses Gestational Diabetes, Obesity, Congenital Hyperinsulinism, and Type 2 Diabetes (T2D). Dr. Page is currently accepting new patients.

    Learn about our expert tiers
    Advanced in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Advanced in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Referral may be required

    Lac-USC Medical Center

    1200 N State St, 
    Los Angeles, CA 
     (9.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Marc Weigensberg is a Pediatric Endocrinologist practicing medicine in Los Angeles, California. Dr. Weigensberg is rated as an Advanced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Obesity, Obesity in Children, Congenital Hyperinsulinism, and Type 1 Diabetes (T1D). Dr. Weigensberg is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Experienced in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Referral may be required

    Neurology Clinic At Miller Children's & Women's Hospital (Long Beach)

    2880 Atlantic Ave Ste 220, 
    Long Beach, CA 
     (9.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Rebecca Hicks is a Pediatric Endocrinologist practicing medicine in Long Beach, California. Dr. Hicks is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. Her clinical expertise encompasses Precocious Puberty, Short Stature (Growth Disorders), Idiopathic Short Stature (ISS), and Familial Short Stature (FSS). Dr. Hicks is currently accepting new patients.

    Distinguished in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Distinguished in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Referral may be required

    Children's Hospital Los Angeles

    4650 W Sunset Blvd, 
    Los Angeles, CA 
     (14.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Mitchell Geffner is a Pediatric Endocrinologist practicing medicine in Los Angeles, California. Dr. Geffner is rated as a Distinguished provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 19 other conditions, according to our data. His clinical expertise encompasses Congenital Adrenal Hyperplasia (CAH), Intersex, Ovarian Overproduction of Androgens, Short Stature (Growth Disorders), and Hormone Replacement Therapy (HRT). Dr. Geffner is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Experienced in Congenital Hyperinsulinism
    Referral required

    PIH Health Whittier Hospital

    12401 Washington Blvd, 
    Whittier, CA 
     (5.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Christian Gastelum is an Endocrinologist practicing medicine in Whittier, California. Dr. Gastelum is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 23 other conditions, according to our data. His clinical expertise encompasses Infant Hyperglycemia, Type 2 Diabetes (T2D), Hypothyroidism, and Maturity Onset Diabetes of the Young. Dr. Gastelum is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Endocrinology
    Experienced in Congenital Hyperinsulinism
    Endocrinology
    Referral required

    The Kidney Specialist Medical Corp.

    101 E Beverly Blvd, 
    Montebello, CA 
     (5.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Brian Zwecker is an Endocrinologist practicing medicine in Montebello, California. Dr. Zwecker is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses End-Stage Renal Disease (ESRD), Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Nephrocalcinosis. Dr. Zwecker is board certified in American Board Internal Medicine.

    Experienced in Congenital Hyperinsulinism
    Endocrinology
    Experienced in Congenital Hyperinsulinism
    Endocrinology
    Referral required

    The Kidney Specialist Medical Corp.

    101 E Beverly Blvd, 
    Montebello, CA 
     (5.5 miles away)
    Languages Spoken:
    English

    Willy Singh is an Endocrinologist practicing medicine in Montebello, California. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses End-Stage Renal Disease (ESRD), Type 2 Diabetes (T2D), Liver Failure, and Milk-Alkali Syndrome. Dr. Singh is board certified in American Board Internal Medicine.

    Experienced in Congenital Hyperinsulinism
    Endocrinology
    Experienced in Congenital Hyperinsulinism
    Endocrinology
    Referral required

    County Of Los Angeles Auditor Controller

    245 S Fetterly Ave, 
    Los Angeles, CA 
     (6.8 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Braden Barnett is an Endocrinologist practicing medicine in Los Angeles, California. Dr. Barnett is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 29 other conditions, according to our data. His clinical expertise encompasses Osteoporosis, Postmenopausal Osteoporosis, Paget's Disease of Bone, and Medullary Thyroid Carcinoma. Dr. Barnett is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Family Medicine
    Experienced in Congenital Hyperinsulinism
    Family Medicine

    Universal Community Health Center

    2801 S San Pedro St, 
    Los Angeles, CA 
     (9.2 miles away)
    Languages Spoken:
    English

    John-david Lyons is a primary care provider, practicing in Family Medicine in Los Angeles, California. Dr. Lyons is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 15 other conditions, according to our data. His clinical expertise encompasses Obesity, Obesity in Children, Familial Hypertriglyceridemia, Type 2 Diabetes (T2D), and Intrauterine Device Insertion. Dr. Lyons is board certified in American Board Of Family Medicine.

    Experienced in Congenital Hyperinsulinism
    Experienced in Congenital Hyperinsulinism
    Referral required

    Keck Hospital Of USC

    1500 San Pablo St, 
    Los Angeles, CA 
     (9.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Thomas Buchanan is an Endocrinologist practicing medicine in Los Angeles, California. Dr. Buchanan is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Gestational Diabetes, Type 2 Diabetes (T2D), Obesity, and Maturity Onset Diabetes of the Young. Dr. Buchanan is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Experienced in Congenital Hyperinsulinism
    Pediatric Endocrinology
    Referral may be required

    Cherese Mari Laulhere Children's Village

    2701 Atlantic Ave, 
    Long Beach, CA 
     (9.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Erin Okawa is a Pediatric Endocrinologist practicing medicine in Long Beach, California. Dr. Okawa is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. Her clinical expertise encompasses Congenital Hyperinsulinism, Short Stature (Growth Disorders), Familial Short Stature (FSS), and Idiopathic Short Stature (ISS). Dr. Okawa is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Endocrinology | Pediatrics
    Experienced in Congenital Hyperinsulinism
    Endocrinology | Pediatrics
    Referral required

    Brakin MD Faap Inc.,mario I

    2650 Elm Ave, 
    Long Beach, CA 
     (9.8 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Pablito Nagpala is an Endocrinologist and a Pediatrics provider practicing medicine in Long Beach, California. Dr. Nagpala is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 16 other conditions, according to our data. His clinical expertise encompasses Short Stature (Growth Disorders), Familial Short Stature (FSS), Idiopathic Short Stature (ISS), and Precocious Puberty. Dr. Nagpala is board certified in American Board Pediatrics. Dr. Nagpala is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Pediatrics | General Practice
    Experienced in Congenital Hyperinsulinism
    Pediatrics | General Practice
    Referral may be required

    Angeles Community Health Center

    1919 W 7th St, 
    Los Angeles, CA 
     (11.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jose Diaz is a primary care provider, a Pediatrics specialist and a General Practice provider in Los Angeles, California. Dr. Diaz is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 53 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Multisystem Inflammatory Syndrome in Children (MIS-C), COVID-19, Tracheitis, and Intrauterine Device Insertion. Dr. Diaz is board certified in American Board Pediatrics. Dr. Diaz is currently accepting new patients.

    Advanced in Congenital Hyperinsulinism
    Endocrinology
    Advanced in Congenital Hyperinsulinism
    Endocrinology
    Referral required

    Optum - Los Alamitos

    3460 Katella Ave, 
    Los Alamitos, CA 
     (10.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Stefan Cadag is an Endocrinologist practicing medicine in Los Alamitos, California. Dr. Cadag is rated as an Advanced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 27 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Maturity Onset Diabetes of the Young, Juvenile Primary Osteoporosis, and Obesity in Children. Dr. Cadag is board certified in National Board Of Physicians And Surgeons. Dr. Cadag is currently accepting new patients.

    Experienced in Congenital Hyperinsulinism
    Experienced in Congenital Hyperinsulinism
    Referral required

    Jhanna A. Nariyants, DO Private Practice

    988 S Fair Oaks Ave, 
    Pasadena, CA 
     (13.1 miles away)
    Languages Spoken:
    English, Armenian, Russian
    Accepting New Patients

    Jhanna Nariyants is an Endocrinologist practicing medicine in Pasadena, California. Dr. Nariyants is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. She is also highly rated in 4 other conditions, according to our data. Her clinical expertise encompasses Adrenal Gland Adenoma, Type 2 Diabetes (T2D), Pheochromocytoma, and Hereditary Paraganglioma-Pheochromocytoma Syndrome. Dr. Nariyants is board certified in Internal Medicine (Sub: Endocrinology, Diabetes & Met and American Board Of Internal Medicine. Dr. Nariyants is currently accepting new patients.

    Advanced in Congenital Hyperinsulinism
    Internal Medicine
    Advanced in Congenital Hyperinsulinism
    Internal Medicine

    Kaiser Permanente South Bay Medical Center

    25825 Vermont Ave, 
    Harbor City, CA 
     (13.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Jun Ma is a primary care provider, practicing in Internal Medicine in Harbor City, California. Dr. Ma is rated as an Advanced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 62 other conditions, according to our data. His clinical expertise encompasses Obesity, Obesity in Children, Nasopharyngeal Carcinoma, Osteotomy, and Laminectomy.

    Advanced in Congenital Hyperinsulinism
    Internal Medicine
    Advanced in Congenital Hyperinsulinism
    Internal Medicine

    Southern California Internists Medical Group

    1713 E Walnut St, 
    Pasadena, CA 
     (14.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Gregor Paronian is a primary care provider, practicing in Internal Medicine in Pasadena, California. Dr. Paronian is rated as an Advanced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Cirrhosis, Familial Combined Hyperlipidemia, Xanthoma, and Vitamin D Deficiency. Dr. Paronian is board certified in American Board Of Internal Medicine.

    Experienced in Congenital Hyperinsulinism
    Family Medicine | Geriatrics
    Experienced in Congenital Hyperinsulinism
    Family Medicine | Geriatrics

    Saran Medical Center

    1510 S Central Ave, 
    Glendale, CA 
     (14.7 miles away)
    Languages Spoken:
    English, Armenian, Farsi
    Accepting New Patients
    Offers Telehealth

    Ferdinant Saran is a primary care provider, practicing in Family Medicine and Geriatrics in Glendale, California. Dr. Saran is rated as an Experienced provider by MediFind in the treatment of Congenital Hyperinsulinism. He is also highly rated in 38 other conditions, according to our data. His clinical expertise encompasses Vitamin D Deficiency, Cirrhosis, Peptic Ulcer, Gastrostomy, and Colonoscopy. Dr. Saran is board certified in Family Medicine, Family Medicine (Sub: Hospice And Palliative Medicine, and American Board Internal Medicine. Dr. Saran is currently accepting new patients.

    Showing 1-20 of 30

    Last Updated: 09/26/2026

    What is the definition of Congenital Hyperinsulinism?

    Congenital hyperinsulinism is a condition that causes individuals to have abnormally high levels of insulin. Insulin is a hormone that helps control levels of blood glucose, also called blood sugar. People with this condition have frequent episodes of low blood glucose (hypoglycemia). In infants and young children, these episodes are characterized by a lack of energy (lethargy), irritability, or difficulty feeding. Repeated episodes of low blood glucose increase the risk for serious complications such as breathing difficulties, seizures, intellectual disability, vision loss, brain damage, and coma.

    When should I see a Congenital Hyperinsulinism doctor near downey, 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 Congenital Hyperinsulinism doctor near downey, 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 Congenital Hyperinsulinism doctors near downey, 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 Congenital Hyperinsulinism doctors near downey, 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 Congenital Hyperinsulinism doctor near downey, 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 Congenital Hyperinsulinism doctor search results page. 

    Why is it important to get a second opinion from a different Congenital Hyperinsulinism 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 Congenital Hyperinsulinism doctor near downey, 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 Congenital Hyperinsulinism 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 Congenital Hyperinsulinism 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 Congenital Hyperinsulinism doctors near downey, CA?

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

    Look for the filter feature on the left-side of the Congenital Hyperinsulinism 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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