The 20 Best Insomnia Doctors Near Me in Diamond Bar, CA

Find the Top Insomnia Experts and Specialists

The 20 Best Insomnia Doctors near Diamond Bar, CA

Last Updated: 02/22/2026

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MediFind found 348 doctor with experience in Insomnia near Diamond Bar, CA. Of these, 331 are Experienced, 16 are Advanced and 1 are Distinguished.

Location
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348 providers found
    Distinguished in Insomnia
    Neurology | Sleep Medicine
    Distinguished in Insomnia
    Neurology | Sleep Medicine
    101 East Valencia Mesa Drive, Suite 7B, 
    Fullerton, CA 
     (9.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Errajith Desilva is a Neurologist and a Sleep Medicine provider in Fullerton, California. Dr. Desilva is rated as a Distinguished provider by MediFind in the treatment of Insomnia. His top areas of expertise are Obstructive Sleep Apnea, Insomnia, Drowsiness, Gastrostomy, and Endoscopy. Dr. Desilva is currently accepting new patients.

    Experienced in Insomnia
    Pediatrics | Internal Medicine
    Experienced in Insomnia
    Pediatrics | Internal Medicine
    2707 South Diamond Bar Boulevard, Suite 104, 
    Diamond Bar, CA 
     (1.2 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Offers Telehealth

    Jonathan Ou is a primary care provider, practicing in Pediatrics and Internal Medicine in Diamond Bar, California. Dr. Ou has been practicing medicine for over 17 years and is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Osteomyelitis in Children, High Cholesterol, Febrile Neutropenia, and Vitamin D Deficiency.

    Advanced in Insomnia
    Family Medicine
    Advanced in Insomnia
    Family Medicine

    Office

    3110 Chino Ave Ste 150A, 
    Chino Hills, CA 
     (4.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Ryan Agena is a primary care provider, practicing in Family Medicine in Chino Hills, California. Dr. Agena is rated as an Advanced provider by MediFind in the treatment of Insomnia. His top areas of expertise are High Cholesterol, Glucocorticoid-Remediable Aldosteronism, Hypertension, and Familial Hypertension.

    Learn about our expert tiers
    Advanced in Insomnia
    Family Medicine
    Advanced in Insomnia
    Family Medicine

    Office

    2425 S Azusa Ave, 
    West Covina, CA 
     (6.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Armen Nercessian is a primary care provider, practicing in Family Medicine in West Covina, California. Dr. Nercessian is rated as an Advanced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, Hypertension, and Type 2 Diabetes (T2D).

    Advanced in Insomnia
    General Practice | Internal Medicine
    Advanced in Insomnia
    General Practice | Internal Medicine

    Office

    1840 N Hacienda Blvd Ste 6, 
    La Puente, CA 
     (7.5 miles away)
    Languages Spoken:
    English

    Jesus Arenas is a primary care provider, practicing in General Practice and Internal Medicine in La Puente, California. Dr. Arenas is rated as an Advanced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Arthritis, Hypertensive Heart Disease, Enlarged Liver, and Type 2 Diabetes (T2D).

    Dennis J. Ponzio
    Experienced in Insomnia
    Family Medicine | Pediatrics
    Experienced in Insomnia
    Family Medicine | Pediatrics

    Caduceus Medical Group

    18200 Yorba Linda Blvd, Suite 250, 
    Yorba Linda, CA 
     (7.8 miles away)
    Experience:
    38+ years
    Languages Spoken:
    English
    Offers Telehealth

    Dennis Ponzio is a primary care provider, practicing in Pediatrics and Family Medicine in Yorba Linda, California. Dr. Ponzio has been practicing medicine for over 38 years and is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are High Cholesterol, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine
    253 South Diamond Bar Boulevard, 
    Diamond Bar, CA 
     (1.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Aaron Lin is a primary care provider, practicing in Family Medicine in Diamond Bar, California. Dr. Lin is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are High Cholesterol, Chronic Rhinosinusitis with Nasal Polyps (CRSwNP), Sciatica, and COVID-19. Dr. Lin is currently accepting new patients.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine
    253 South Diamond Bar Boulevard, 
    Diamond Bar, CA 
     (1.2 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Eric Lee is a primary care provider, practicing in Family Medicine in Diamond Bar, California. Dr. Lee has been practicing medicine for over 10 years and is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are High Cholesterol, Type 2 Diabetes (T2D), Gout, and Congenital Hemolytic Anemia. Dr. Lee is currently accepting new patients.

    Experienced in Insomnia
    Family Medicine | Geriatrics
    Experienced in Insomnia
    Family Medicine | Geriatrics
    253 South Diamond Bar Boulevard, 
    Diamond Bar, CA 
     (1.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    David Rhodes is a primary care provider, practicing in Family Medicine and Geriatrics in Diamond Bar, California. Dr. Rhodes is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Type 2 Diabetes (T2D), Osteomyelitis in Children, Familial Hypertension, and Glucocorticoid-Remediable Aldosteronism.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine
    253 South Diamond Bar Boulevard, 
    Diamond Bar, CA 
     (1.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Patrick Bachoura is a primary care provider, practicing in Family Medicine in Diamond Bar, California. Dr. Bachoura is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Cerebellar Multiple System Atrophy, Hepatocerebral Degeneration, Chronic Pain, and Osteomyelitis in Children. Dr. Bachoura is currently accepting new patients.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    St. Jude Heritage Diamond Bar-Primary Care

    1514 Valley Vista Dr, 
    Diamond Bar, CA 
     (1.7 miles away)
    Languages Spoken:
    English

    Jeanette Castro is a primary care provider, practicing in Family Medicine in Diamond Bar, California. Dr. Castro is rated as an Experienced provider by MediFind in the treatment of Insomnia. Her top areas of expertise are Cerebellar Multiple System Atrophy, Hepatocerebral Degeneration, High Cholesterol, and Osteomyelitis in Children.

    Experienced in Insomnia
    Family Medicine | Internal Medicine
    Experienced in Insomnia
    Family Medicine | Internal Medicine

    Jonah Medical Group, Inc

    20627 Golden Springs Dr, 
    Diamond Bar, CA 
     (2.5 miles away)
    Experience:
    14+ years
    Languages Spoken:
    English
    Offers Telehealth

    Jun Chung is a primary care provider, practicing in Internal Medicine and Family Medicine in Diamond Bar, California. Dr. Chung has been practicing medicine for over 14 years and is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Shingles, Familial Combined Hyperlipidemia, Xanthoma, Endoscopy, and Pacemaker Implantation.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    Premier Family Medicine Associates, Inc

    2140 Grand Ave, Suite 125, 
    Chino Hills, CA 
     (3.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Jesse Cheung is a primary care provider, practicing in Family Medicine in Chino Hills, California. Dr. Cheung is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Type 2 Diabetes (T2D), Obesity, Sepsis, and Glucocorticoid-Remediable Aldosteronism.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    Luis Perez M.D. A Professional Corp.

    716 E Mission Blvd Ste D, 
    Pomona, CA 
     (4.3 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Luis Mejia is a primary care provider, practicing in Family Medicine in Pomona, California. Dr. Mejia is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Type 2 Diabetes (T2D), Osteomyelitis in Children, High Cholesterol, and Infant Hyperglycemia.

    Experienced in Insomnia
    Holistic Medicine
    Experienced in Insomnia
    Holistic Medicine

    Western Univ. Of Health Sciences

    795 E 2nd St Ste 5, 
    Pomona, CA 
     (4.3 miles away)
    Languages Spoken:
    English

    Dat Trinh is a primary care provider, practicing in Holistic Medicine in Pomona, California. Mr. Trinh is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Obesity in Children, Food Allergy, Obesity, and Type 2 Diabetes (T2D).

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    Western Univ. Of Health Sciences

    795 E 2nd St Ste 5, 
    Pomona, CA 
     (4.3 miles away)
    Languages Spoken:
    English

    Stephanie White is a primary care provider, practicing in Family Medicine in Pomona, California. Dr. White is rated as an Experienced provider by MediFind in the treatment of Insomnia. Her top areas of expertise are Type 2 Diabetes (T2D), Sciatica, Vaginal Cysts, and Vaginal Dryness.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    Western Univ. Of Health Sciences

    795 E 2nd St Ste 5, 
    Pomona, CA 
     (4.3 miles away)
    Languages Spoken:
    English

    Nghia Phan is a primary care provider, practicing in Family Medicine in Pomona, California. Dr. Phan is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Type 2 Diabetes (T2D), Osteomyelitis in Children, Cirrhosis, and Familial Combined Hyperlipidemia.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    Smartclinic Inc.

    2707 E Valley Blvd, 
    West Covina, CA 
     (4.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    David Chen is a primary care provider, practicing in Family Medicine in West Covina, California. Dr. Chen is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are High Cholesterol, Fish-Eye Disease, Familial Hypobetalipoproteinemia, and Hypolipoproteinemia.

    Experienced in Insomnia
    Family Medicine
    Experienced in Insomnia
    Family Medicine

    Avita Pharmacy 1013

    1555 S Garey Ave, 
    Pomona, CA 
     (4.5 miles away)
    Languages Spoken:
    English

    Asheesh Pasi is a primary care provider, practicing in Family Medicine in Pomona, California. Dr. Pasi is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Obesity in Children, Food Allergy, Type 2 Diabetes (T2D), and Familial Hypertriglyceridemia.

    Experienced in Insomnia
    Internal Medicine
    Experienced in Insomnia
    Internal Medicine

    Jason S Paek MD Inc.

    18773 Colima Rd, 
    Rowland Heights, CA 
     (4.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Jason Paek is a primary care provider, practicing in Internal Medicine in Rowland Heights, California. Dr. Paek is rated as an Experienced provider by MediFind in the treatment of Insomnia. His top areas of expertise are Osteomyelitis in Children, Infant Hyperglycemia, Indigestion, and Tracheitis.

    Showing 1-20 of 348

    Last Updated: 02/22/2026

    What is the definition of Insomnia?

    Insomnia is trouble falling asleep, staying asleep (usually through the night), or waking up too early in the morning.

    Episodes of insomnia may come and go or be long-lasting.

    The quality of your sleep is as important as how much sleep you get.

    When should I see an Insomnia doctor near Diamond Bar, 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 an Insomnia doctor near Diamond Bar, 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 Insomnia doctors near Diamond Bar, 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 Insomnia doctors near Diamond Bar, 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 an Insomnia doctor near Diamond Bar, 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 Insomnia doctor search results page. 

    Why is it important to get a second opinion from a different Insomnia 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 an Insomnia doctor near Diamond Bar, 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 Insomnia 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 Insomnia 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 Insomnia doctors near Diamond Bar, CA?

    Look for the filter feature on the left side of the Insomnia 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 an Insomnia doctor that offers video calls?

    Look for the filter feature on the left-side of the Insomnia 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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