The 20 Best Sinusitis Doctors Near Me in Ontario, CA

Find the Top Sinusitis Experts and Specialists

Last Updated: 09/26/2026

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MediFind found 298 doctor with experience in Sinusitis near Ontario, CA. Of these, 272 are Experienced, 23 are Advanced and 3 are Distinguished.

Location
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298 providers found
    Distinguished in Sinusitis
    Internal Medicine
    Distinguished in Sinusitis
    Internal Medicine

    Office

    440 N Mountain Ave Ste 301, 
    Upland, CA 
     (2.9 miles away)
    Languages Spoken:
    English

    Amit Patel is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Patel is rated as a Distinguished provider by MediFind in the treatment of Sinusitis. He is also highly rated in 13 other conditions, according to our data. His clinical expertise encompasses Grass Allergy, Hives, Empyema, and Sinusitis.

    Distinguished in Sinusitis
    Otolaryngology
    Distinguished in Sinusitis
    Otolaryngology
    Referral may be required

    Inland Ear Nose And Throat A Medical Group Inc.

    1030 E Foothill Blvd Ste 101, 
    Upland, CA 
     (3.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Natee Poopat is an Otolaryngologist practicing medicine in Upland, California. Dr. Poopat is rated as a Distinguished provider by MediFind in the treatment of Sinusitis. He is also highly rated in 28 other conditions, according to our data. His clinical expertise encompasses Sinusitis, Empyema, Chronic Rhinosinusitis with Nasal Polyps (CRSwNP), Infant Hearing Loss, and Myringotomy.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    Cucamonga Valley Medical Group, Inc.

    5562 Philadelphia St, 
    Chino, CA 
     (2.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jesse Minguez is a primary care provider, practicing in Family Medicine in Chino, California. Dr. Minguez is rated as an Experienced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 49 other conditions, according to our data. His clinical expertise encompasses Familial Combined Hyperlipidemia, Xanthoma, Cirrhosis, and Alcoholic Neuropathy. Dr. Minguez is board certified in American Board Of Family Medicine. Dr. Minguez is currently accepting new patients.

    Learn about our expert tiers
    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    Susan Biegel MD Inc.

    1004 W Foothill Blvd Ste 200, 
    Upland, CA 
     (2.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Susan Biegel is a primary care provider, practicing in Internal Medicine in Upland, California. Dr. Biegel is rated as an Experienced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 29 other conditions, according to our data. Her clinical expertise encompasses Sitosterolemia, Vitamin D Deficiency, Hypervitaminosis D, and High Cholesterol. Dr. Biegel is currently accepting new patients.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    Grove Internal Medicine, Inc.

    8283 Grove Ave, 
    Rancho Cucamonga, CA 
     (2.9 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Sean To is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. To is rated as an Experienced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 13 other conditions, according to our data. His clinical expertise encompasses Osteomyelitis in Children, Type 2 Diabetes (T2D), High Cholesterol, and Hypertension. Dr. To is currently accepting new patients.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    Chino Medical Group Inc

    5475 Walnut Ave, 
    Chino, CA 
     (3.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Venkata Pulakanti is a primary care provider, practicing in Internal Medicine in Chino, California. Dr. Pulakanti is rated as an Experienced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Obesity, Obesity in Children, Type 2 Diabetes (T2D), and Familial Hypertension. Dr. Pulakanti is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    Parktree Community Health Center

    1450 E Holt Ave, 
    Pomona, CA 
     (4.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Ngozi Chukwu is a primary care provider, practicing in Family Medicine in Pomona, California. Dr. Chukwu is rated as an Experienced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Obesity in Children, Food Allergy, Type 2 Diabetes (T2D), and Vitamin D Deficiency. Dr. Chukwu is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    Office

    1601 Monte Vista Ave Ste 190, 
    Claremont, CA 
     (4.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jose Ramos is a primary care provider, practicing in Family Medicine in Claremont, California. Dr. Ramos is rated as an Experienced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Sepsis, Peptic Ulcer, and Necrosis. Dr. Ramos is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    Cucamonga Valley Medical Group

    7777 Milliken Ave Ste 240, 
    Rancho Cucamonga, CA 
     (4.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    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 Sinusitis. He is also highly rated in 18 other conditions, according to our data. His clinical expertise encompasses Obesity, Cirrhosis, Familial Combined Hyperlipidemia, and Xanthoma. Dr. Bekemeier is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    9190 Haven Ave

    9190 Haven Ave Ste 102, 
    Rancho Cucamonga, CA 
     (4.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Ani Berberyan is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Berberyan is rated as an Experienced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 11 other conditions, according to our data. Her clinical expertise encompasses Obesity, Axillary Nerve Dysfunction, Sciatica, and High Cholesterol. Dr. Berberyan is currently accepting new patients.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    Harvey D. Cohen M.D. Inc.

    8330 Red Oak St Ste 201, 
    Rancho Cucamonga, CA 
     (4.7 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Accepting New Patients
    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 Sinusitis. 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. Dr. Tint is currently accepting new patients.

    Advanced in Sinusitis
    Otolaryngology
    Advanced in Sinusitis
    Otolaryngology
    Referral may be required

    Ent And Sinus Center, Inc.

    8241 Rochester Ave, 
    Rancho Cucamonga, CA 
     (6.6 miles away)
    Languages Spoken:
    English, Bengali, Spanish
    Accepting New Patients

    Deborshi Roy is an Otolaryngologist practicing medicine in Rancho Cucamonga, California. Dr. Roy is rated as an Advanced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Chronic Rhinosinusitis with Nasal Polyps (CRSwNP), Familial Deafness, Sinusitis, and Choanal Atresia. Dr. Roy is board certified in American Board Of Otolaryngology and Otolaryngology. Dr. Roy is currently accepting new patients.

    Advanced in Sinusitis
    Otolaryngology
    Advanced in Sinusitis
    Otolaryngology
    Referral may be required

    Inland Ear Nose And Throat A Medical Group Inc.

    1030 E Foothill Blvd Ste 101, 
    Upland, CA 
     (3.0 miles away)
    Languages Spoken:
    English

    Clara Olcott is an Otolaryngologist practicing medicine in Upland, California. Dr. Olcott is rated as an Advanced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 22 other conditions, according to our data. Her clinical expertise encompasses Familial Deafness, Palatal Myoclonus, Nonallergic Rhinopathy, and Ozena.

    Advanced in Sinusitis
    Family Medicine
    Advanced in Sinusitis
    Family Medicine

    Morris Kokhab M.D. A Medical Corporation

    974 W Foothill Blvd, 
    Upland, CA 
     (3.1 miles away)
    Languages Spoken:
    English

    Louis Dibernardo is a primary care provider, practicing in Family Medicine in Upland, California. Dr. Dibernardo is rated as an Advanced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Tracheitis, Lymphangitis, Otitis, and Cellulitis.

    Advanced in Sinusitis
    Otolaryngology
    Advanced in Sinusitis
    Otolaryngology
    Referral may be required

    Ontario Medical Center

    2295 S Vineyard Avenue, 
    Ontario, CA 
     (3.2 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Samaneh Ashktorab is an Otolaryngologist practicing medicine in Ontario, California. Dr. Ashktorab is rated as an Advanced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Sinusitis, Cheilitis Glandularis, Tonsil Stones, and Ozena. Dr. Ashktorab is currently accepting new patients.

    Advanced in Sinusitis
    Family Medicine
    Advanced in Sinusitis
    Family Medicine

    Office

    1601 Monte Vista Ave Ste 190, 
    Claremont, CA 
     (4.4 miles away)
    Languages Spoken:
    English

    Monique Castro is a primary care provider, practicing in Family Medicine in Claremont, California. Dr. Castro is rated as an Advanced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 35 other conditions, according to our data. Her clinical expertise encompasses Acute Cystitis, Otitis, Asthma in Children, and Eosinophilic Asthma.

    Advanced in Sinusitis
    Advanced in Sinusitis

    Office

    1601 Monte Vista Ave Ste 190, 
    Claremont, CA 
     (4.4 miles away)
    Languages Spoken:
    English

    Dana Homer-Bertrand is a primary care provider, practicing in Family Medicine in Claremont, California. Dr. Homer-Bertrand is rated as an Advanced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 39 other conditions, according to our data. Her clinical expertise encompasses Cellulitis, Parinaud Oculoglandular Syndrome, Otitis, and Peptic Ulcer.

    Advanced in Sinusitis
    Family Medicine
    Advanced in Sinusitis
    Family Medicine

    Office

    1601 Monte Vista Ave Ste 190, 
    Claremont, CA 
     (4.4 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English

    Irene Sung is a primary care provider, practicing in Family Medicine in Claremont, California. She has been practicing medicine for over 10 years. Dr. Sung is rated as an Advanced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 19 other conditions, according to our data. Her clinical expertise encompasses Parinaud Oculoglandular Syndrome, Cellulitis, Otitis, and Peptic Ulcer.

    Advanced in Sinusitis
    Allergy and Immunology
    Advanced in Sinusitis
    Allergy and Immunology
    Referral may be required

    Allergy And Asthma Specialty Center

    9045 Haven Ave, Ste 101, 
    Rancho Cucamonga, CA 
     (4.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Joshua Gibbs is an Allergy and Immunologist practicing medicine in Rancho Cucamonga, California. Dr. Gibbs is rated as an Advanced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Allergic Conjunctivitis, Conjunctivitis (Pink Eye), Grass Allergy, and Allergic Rhinitis. Dr. Gibbs is board certified in Allergy & Immunology and Internal Medicine. Dr. Gibbs is currently accepting new patients.

    Advanced in Sinusitis
    Family Medicine
    Advanced in Sinusitis
    Family Medicine

    Fagan, John A. Family Practice, Inc.

    10787 Laurel St, 
    Rancho Cucamonga, CA 
     (5.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    John Fagan is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Fagan is rated as an Advanced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 45 other conditions, according to our data. His clinical expertise encompasses Ehlers-Danlos Syndrome (EDS), Hypertension, Familial Hypertension, and Glucocorticoid-Remediable Aldosteronism. Dr. Fagan is board certified in American Board Of Family Medicine. Dr. Fagan is currently accepting new patients.

    Showing 1-20 of 298

    Last Updated: 09/26/2026

    What is the definition of Sinusitis?

    Sinusitis is present when the tissue lining the sinuses become swollen or inflamed. It occurs as the result of an inflammatory reaction or an infection from a virus, bacteria, or fungus.

    When should I see a Sinusitis doctor near 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 Sinusitis doctor near 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 does MediFind rank Sinusitis doctors near 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 Sinusitis doctors near 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 Sinusitis doctor near 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 Sinusitis doctor search results page. 

    Why is it important to get a second opinion from a different Sinusitis 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 Sinusitis doctor near 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 Sinusitis 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 Sinusitis 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 Sinusitis doctors near Ontario, CA?

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

    Look for the filter feature on the left-side of the Sinusitis 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. 

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