The 20 Best Type 1 Diabetes (T1D) Doctors Near Me in Rancho Cucamonga, CA

Find the Top Type 1 Diabetes (T1D) 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 64 doctor with experience in Type 1 Diabetes (T1D) near Rancho Cucamonga, CA. Of these, 51 are Experienced and 13 are Advanced.

Location
LocationClose
64 providers found
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology

    Bashar Saad, M.D., Inc.

    630 N 13th Ave, 
    Upland, CA 
     (2.3 miles away)
    Experience:
    28+ years
    Languages Spoken:
    English

    Tony Kastoon is an Endocrinologist practicing medicine in Upland, California. He has been practicing medicine for over 28 years. Dr. Kastoon is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Thyroid Storm, Type 2 Diabetes (T2D), Hypothyroidism, and Hyperparathyroidism. Dr. Kastoon is board certified in American Board Of Internal Medicine.

    Experienced in Type 1 Diabetes (T1D)
    Endocrinology
    Experienced in Type 1 Diabetes (T1D)
    Endocrinology

    Rubina Aqeel MD Inc.

    1183 E Foothill Blvd Ste 260, 
    Upland, CA 
     (3.9 miles away)
    Languages Spoken:
    English

    Rubina Aqeel is an Endocrinologist practicing medicine in Upland, California. Dr. Aqeel is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). She is also highly rated in 29 other conditions, according to our data. Her clinical expertise encompasses Hyperthyroidism, Sheehan Syndrome, Hypopituitarism, and Isolated Hypogonadotropic Hypogonadism.

    Advanced in Type 1 Diabetes (T1D)
    Family Medicine | Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Family Medicine | Endocrinology
    9220 Haven Ave, Suite 230, 
    Rancho Cucamonga, CA 
     (1.7 miles away)
    Languages Spoken:
    English

    Jeffrey Unger is an Endocrinologist practicing medicine in Rancho Cucamonga, California. Dr. Unger is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Type 1 Diabetes (T1D), Maturity Onset Diabetes of the Young, and Diabetic Neuropathy.

    Learn about our expert tiers
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology

    Inland Endocrine

    9471 Haven Ave, 
    Rancho Cucamonga, CA 
     (2.0 miles away)
    Experience:
    18+ years
    Languages Spoken:
    English
    Offers Telehealth

    Stuart Seigel is an Endocrinologist practicing medicine in Rancho Cucamonga, California. He has been practicing medicine for over 18 years. Dr. Seigel is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 15 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Type 1 Diabetes (T1D), Thyroid Storm, and Low Testosterone. Dr. Seigel is board certified in American Board Of Internal Medicine.

    Advanced in Type 1 Diabetes (T1D)
    Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology

    Inland Endocrine

    9471 Haven Ave, 
    Rancho Cucamonga, CA 
     (2.0 miles away)
    Experience:
    22+ years
    Languages Spoken:
    English
    Offers Telehealth

    Amitpal Kohli is an Endocrinologist practicing medicine in Rancho Cucamonga, California. He has been practicing medicine for over 22 years. Dr. Kohli is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Low Testosterone, Diabetic Neuropathy, and Thyroid Storm. Dr. Kohli is board certified in American Board Of Internal Medicine.

    Advanced in Type 1 Diabetes (T1D)
    Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology

    Southern California Permanente Medical Group

    2295 S Vineyard Ave, 
    Ontario, CA 
     (5.2 miles away)
    Languages Spoken:
    English

    Brandon Chock is an Endocrinologist practicing medicine in Ontario, California. Dr. Chock is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Type 1 Diabetes (T1D), Empty Sella Syndrome, Thyroid Nodule, and Prolactinoma.

    Advanced in Type 1 Diabetes (T1D)
    Advanced in Type 1 Diabetes (T1D)

    Southern California Permanente Medical Group

    2295 S Vineyard Ave, 
    Ontario, CA 
     (5.2 miles away)
    Languages Spoken:
    English

    Matthew Mccauley is an Endocrinologist practicing medicine in Ontario, California. Dr. Mccauley is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Thyroid Nodule, Type 1 Diabetes (T1D), Thyroid Storm, and Adrenal Insufficiency Pediatric.

    Advanced in Type 1 Diabetes (T1D)
    Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology

    Southern California Permanente Medical Group

    9961 Sierra Ave, 
    Fontana, CA 
     (9.3 miles away)
    Languages Spoken:
    English

    Dat Ha is an Endocrinologist practicing medicine in Fontana, California. Dr. Ha is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Type 1 Diabetes (T1D), Thyroid Nodule, Thyroid Storm, and Hyperthyroidism.

    Advanced in Type 1 Diabetes (T1D)
    Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Endocrinology

    Southern California Permanente Medical Group

    9961 Sierra Ave, 
    Fontana, CA 
     (9.3 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English

    Eunice Chuang is an Endocrinologist practicing medicine in Fontana, California. She has been practicing medicine for over 17 years. Dr. Chuang is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Type 1 Diabetes (T1D), Thyroid Nodule, Hyperthyroidism, and Addison's Disease.

    Advanced in Type 1 Diabetes (T1D)
    Pediatric Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Pediatric Endocrinology

    Southern California Permanente Medical Group

    9961 Sierra Ave, 
    Fontana, CA 
     (9.3 miles away)
    Languages Spoken:
    English

    Ramin Mogadas is a Pediatric Endocrinologist practicing medicine in Fontana, California. Dr. Mogadas is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Precocious Puberty, Short Stature (Growth Disorders), Ovarian Overproduction of Androgens, and Type 1 Diabetes (T1D).

    Advanced in Type 1 Diabetes (T1D)
    Pediatric Endocrinology
    Advanced in Type 1 Diabetes (T1D)
    Pediatric Endocrinology

    Kaiser Permanente Fontana

    9985 Sierra Ave, 
    Fontana, CA 
     (9.4 miles away)
    Languages Spoken:
    English

    Maria Lin is a Pediatric Endocrinologist practicing medicine in Fontana, California. Dr. Lin is rated as an Advanced provider by MediFind in the treatment of Type 1 Diabetes (T1D). She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Type 1 Diabetes (T1D), Newborn Jaundice, Adrenal Insufficiency Pediatric, and Short Stature (Growth Disorders).

    Experienced in Type 1 Diabetes (T1D)
    Family Medicine
    Experienced in Type 1 Diabetes (T1D)
    Family Medicine

    Rommie F. Fakhoury MD Inc.

    10601 Church St Ste 110, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Rommie Fakhoury is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Fakhoury is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). His clinical expertise encompasses Type 1 Diabetes (T1D), Urinary Tract Infection in Children, Urinary Tract Infection (UTI), and Hashimoto Thyroiditis.

    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine
    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine

    Carlos R. Vigil DO A Professional Corp.

    7974 Haven Ave Ste 210, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Carlos Vigil is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Vigil is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 26 other conditions, according to our data. His clinical expertise encompasses Acute Kidney Failure, Renovascular Hypertension, End-Stage Renal Disease (ESRD), Gastrostomy, and Endoscopy.

    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine
    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine

    Harvey D. Cohen M.D. Inc.

    8330 Red Oak St Ste 201, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Offers Telehealth

    Nyein Tint is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. She has been practicing medicine for over 17 years. Dr. Tint is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). She is also highly rated in 4 other conditions, according to our data. Her clinical expertise encompasses Obesity, Obesity in Children, High Cholesterol, and Vitamin D Deficiency.

    Experienced in Type 1 Diabetes (T1D)
    Family Medicine
    Experienced in Type 1 Diabetes (T1D)
    Family Medicine

    Cucamonga Valley Medical Group

    7777 Milliken Ave Ste 240, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Eric Bekemeier is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Bekemeier is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 18 other conditions, according to our data. His clinical expertise encompasses Obesity, Cirrhosis, Familial Combined Hyperlipidemia, and Xanthoma.

    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine
    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine

    Our Family Medical Group Inc.

    9190 Haven Ave Ste 102, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Hetalben Makwana is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Makwana is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). She is also highly rated in 11 other conditions, according to our data. Her clinical expertise encompasses Osteomyelitis in Children, Breast Cancer, Obesity, and High Cholesterol.

    Experienced in Type 1 Diabetes (T1D)
    Family Medicine
    Experienced in Type 1 Diabetes (T1D)
    Family Medicine

    Fagan, John A. Family Practice, Inc.

    10787 Laurel St, 
    Rancho Cucamonga, CA 
     (1.3 miles away)
    Experience:
    40+ years
    Languages Spoken:
    English
    Offers Telehealth

    John Fagan is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 40 years. Dr. Fagan is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 45 other conditions, according to our data. His clinical expertise encompasses Ehlers-Danlos Syndrome (EDS), Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension. Dr. Fagan is board certified in American Board Of Family Medicine.

    Experienced in Type 1 Diabetes (T1D)
    Endocrinology | Internal Medicine
    Experienced in Type 1 Diabetes (T1D)
    Endocrinology | Internal Medicine

    Chaparral Medical Group, Inc.

    8330 Red Oak St, 
    Rancho Cucamonga, CA 
     (1.4 miles away)
    Experience:
    47+ years
    Languages Spoken:
    English

    Daryoosh Valamanesh is an Internal Medicine specialist and an Endocrinologist practicing medicine in Rancho Cucamonga, California. He has been practicing medicine for over 47 years. Dr. Valamanesh is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 12 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Subacute Thyroiditis, Obesity, Gastrostomy, and Hernia Surgery. Dr. Valamanesh is board certified in American Board Internal Medicine.

    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine
    Experienced in Type 1 Diabetes (T1D)
    Internal Medicine

    Rancho Cucamonga Medical Offices

    10850 Arrow Rte, 
    Rancho Cucamonga, CA 
     (1.5 miles away)
    Languages Spoken:
    English

    Iyad Hanna is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Hanna is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). He is also highly rated in 23 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Familial Colorectal Cancer, Maturity Onset Diabetes of the Young, and Chronic Cough.

    Experienced in Type 1 Diabetes (T1D)
    Endocrinology
    Experienced in Type 1 Diabetes (T1D)
    Endocrinology

    Inland Endocrine

    9471 Haven Ave, 
    Rancho Cucamonga, CA 
     (2.0 miles away)
    Experience:
    11+ years
    Languages Spoken:
    English
    Offers Telehealth

    Jodi Nagelberg is an Endocrinologist practicing medicine in Rancho Cucamonga, California. She has been practicing medicine for over 11 years. Dr. Nagelberg is rated as an Experienced provider by MediFind in the treatment of Type 1 Diabetes (T1D). She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Hyperthyroidism, Thyroid Storm, Secondary Adrenal Insufficiency, Addison's Disease, and Parathyroidectomy. Dr. Nagelberg is board certified in American Board Of Internal Medicine.

    Showing 1-20 of 64

    Last Updated: 04/28/2026

    What is the definition of Type 1 Diabetes (T1D)?

    Type 1 diabetes is a lifelong (chronic) disease in which there is a high level of sugar (glucose) in the blood.

    When should I see a Type 1 Diabetes (T1D) doctor near Rancho Cucamonga, 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 Type 1 Diabetes (T1D) doctor near Rancho Cucamonga, 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 Type 1 Diabetes (T1D) doctors near Rancho Cucamonga, 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 Type 1 Diabetes (T1D) doctors near Rancho Cucamonga, 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 Type 1 Diabetes (T1D) doctor near Rancho Cucamonga, 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 Type 1 Diabetes (T1D) doctor search results page. 

    Why is it important to get a second opinion from a different Type 1 Diabetes (T1D) 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 Type 1 Diabetes (T1D) doctor near Rancho Cucamonga, 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 Type 1 Diabetes (T1D) 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 Type 1 Diabetes (T1D) 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 Type 1 Diabetes (T1D) doctors near Rancho Cucamonga, CA?

    Look for the filter feature on the left side of the Type 1 Diabetes (T1D) 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 Type 1 Diabetes (T1D) doctor that offers video calls?

    Look for the filter feature on the left-side of the Type 1 Diabetes (T1D) 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