The 20 Best Sinusitis Doctors Near Me in O Fallon, MO

Find the Top Sinusitis Experts and Specialists

Last Updated: 09/26/2026

Save doctors for later
Sign Up
Not sure about your diagnosis?
Check Your Symptoms
Already have a doctor?
Find A Second Opinion

MediFind found 116 doctor with experience in Sinusitis near O Fallon, MO. Of these, 108 are Experienced, 4 are Advanced and 4 are Distinguished.

Location
LocationClose
116 providers found
    Distinguished in Sinusitis
    Otolaryngology
    Distinguished in Sinusitis
    Otolaryngology
    Referral may be required

    Midwest ENT Centre

    4790 Executive Centre Parkway, 
    St. Peters, MO 
     (6.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    John Conoyer is an Otolaryngologist practicing medicine in St. Peters, Missouri. Dr. Conoyer is rated as a Distinguished provider by MediFind in the treatment of Sinusitis. He is also highly rated in 39 other conditions, according to our data. His clinical expertise encompasses Nasal Septal Hematoma, Sinusitis, Infant Hearing Loss, and Chronic Rhinosinusitis with Nasal Polyps (CRSwNP). Dr. Conoyer is board certified in American Board Of Otolaryngology , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Conoyer is currently accepting new patients.

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

    Midwest ENT Centre

    4790 Executive Centre Parkway, 
    St. Peters, MO 
     (6.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Karen Boone is an Otolaryngologist practicing medicine in St. Peters, Missouri. Dr. Boone is rated as a Distinguished provider by MediFind in the treatment of Sinusitis. She is also highly rated in 31 other conditions, according to our data. Her clinical expertise encompasses Low Nasal Bridge, Nasal Septal Hematoma, Perichondritis, and Infant Hearing Loss. Dr. Boone is board certified in American Board Of Otolaryngology , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Boone is currently accepting new patients.

    Experienced in Sinusitis
    Experienced in Sinusitis

    SSM Health Medical Group

    1101 Highway K, 
    O Fallon, MO 
     (1.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Michael Hemmersmeier is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Hemmersmeier is rated as an Experienced 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 Familial Hypertension, Coronary Heart Disease, Sacroiliac Joint Disease, Hypothyroidism, and Endoscopy. Dr. Hemmersmeier is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Family Medicine , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Hemmersmeier is currently accepting new patients.

    Learn about our expert tiers
    Distinguished in Sinusitis
    Distinguished in Sinusitis
    Referral may be required

    Midwest ENT Centre

    4790 Executive Centre Parkway, 
    St. Peters, MO 
     (6.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Robert Macdonald is an Otolaryngologist practicing medicine in St. Peters, Missouri. Dr. Macdonald is rated as a Distinguished provider by MediFind in the treatment of Sinusitis. He is also highly rated in 27 other conditions, according to our data. His clinical expertise encompasses DFNB1, Jones Syndrome, Infant Hearing Loss, and Sinusitis. Dr. Macdonald is board certified in American Board Of Otolaryngology , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Macdonald is currently accepting new patients.

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

    Midwest ENT Centre

    4790 Executive Centre Parkway, 
    St. Peters, MO 
     (6.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Ben Conoyer is an Otolaryngologist practicing medicine in St. Peters, Missouri. Dr. Conoyer is rated as a Distinguished provider by MediFind in the treatment of Sinusitis. He is also highly rated in 32 other conditions, according to our data. His clinical expertise encompasses Nasal Septal Hematoma, Low Nasal Bridge, Perichondritis, and Chronic Rhinosinusitis with Nasal Polyps (CRSwNP). Dr. Conoyer is board certified in American Board Of Otolaryngology , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Conoyer is currently accepting new patients.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine
    1002 Peruque Crossing Court, Suite 102, 
    O Fallon, MO 
     (3.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Matthew Meier is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Meier 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 Transient Familial Hyperbilirubinemia, Congenital Hypothyroidism, Thyroid Dysgenesis, Colonoscopy, and Endoscopy. Dr. Meier is board certified in Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration. Dr. Meier is currently accepting new patients.

    Advanced in Sinusitis
    Physician Assistant
    Advanced in Sinusitis
    Physician Assistant
    Referral may be required

    SSM Health Cardinal Glennon Pediatrics Specialty Services

    301 Caledonia Parkway, Suite 220, 
    O Fallon, MO 
     (4.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Cynthia Emily is a Physician Assistant practicing medicine in O Fallon, Missouri. Emily, PA is rated as an Advanced 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 Chronic Rhinosinusitis with Nasal Polyps (CRSwNP), Sinusitis, and Allergic Rhinitis. Emily, PA is board certified in Missouri State Board Of Registration , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Illinois Department Of Financial & Professional Regulation , and National Comm On Certif Of Physician Assistants. Emily, PA is currently accepting new patients.

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

    Midwest ENT Centre

    4790 Executive Centre Parkway, 
    St. Peters, MO 
     (6.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Matthew Page is an Otolaryngologist practicing medicine in St. Peters, Missouri. Dr. Page is rated as an Advanced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 29 other conditions, according to our data. His clinical expertise encompasses Nasal Septal Hematoma, Infant Hearing Loss, Nonsyndromic Hearing Loss, and Benign Paroxysmal Positional Vertigo. Dr. Page is board certified in American Board Of Otolaryngology , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Page is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    SSM Health Medical Group

    1101 Highway K, 
    O Fallon, MO 
     (1.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Leonard Hoffmann is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Hoffmann is rated as an Experienced 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 Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, and Hypothyroidism. Dr. Hoffmann is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Family Medicine , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Hoffmann is currently accepting new patients.

    Experienced in Sinusitis
    Pediatrics | Internal Medicine
    Experienced in Sinusitis
    Pediatrics | Internal Medicine
    Referral may be required

    SSM Health Medical Group

    400 Medical Plaza, Suite 200, 
    Lake St. Louis, MO 
     (4.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Paul Hinton is a primary care provider, practicing in Pediatrics and Internal Medicine in Lake St. Louis, Missouri. Dr. Hinton 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 High Cholesterol, Chronic Obstructive Pulmonary Disease (COPD), Type 2 Diabetes (T2D), Endoscopy, and Gastrostomy. Dr. Hinton is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Pediatrics , Missouri State Board Of Registration, American Board Of Internal Medicine , and Drug Enforcement Administration . Dr. Hinton is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    SSM Health Medical Group

    400 Medical Plaza, Suite 200, 
    Lake St. Louis, MO 
     (4.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jason Vangundy is a primary care provider, practicing in Family Medicine in Lake St. Louis, Missouri. Dr. Vangundy is rated as an Experienced 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 Type 1 Diabetes (T1D), Childhood Iron Deficiency Anemia, End-Stage Renal Disease (ESRD), and Type 2 Diabetes (T2D). Dr. Vangundy is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Family Medicine , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Vangundy is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    SSM Health Medical Group

    400 Medical Plaza, Suite 200, 
    Lake St. Louis, MO 
     (4.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Brian Smith is a primary care provider, practicing in Family Medicine in Lake St. Louis, Missouri. Dr. Smith is rated as an Experienced 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 Migraine, Peripheral Artery Disease, Coronary Heart Disease, and Breast Cancer. Dr. Smith is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Family Medicine , Missouri State Board Of Registration, and Drug Enforcement Administration .

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    SSM Health Medical Group

    301 Caledonia Parkway, Suite 150, 
    O Fallon, MO 
     (4.4 miles away)
    Languages Spoken:
    English, Farsi, Turkish
    Accepting New Patients
    Offers Telehealth

    Maryam Naemi is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Naemi is rated as an Experienced provider by MediFind in the treatment of Sinusitis. Her clinical expertise encompasses Familial Hypertension, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Nephrosclerosis. Dr. Naemi is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Family Medicine , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Naemi is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    SSM Health Medical Group

    301 Caledonia Parkway, Suite 150, 
    O Fallon, MO 
     (4.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Chandra Wiewel is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Wiewel is rated as an Experienced provider by MediFind in the treatment of Sinusitis. Her clinical expertise encompasses Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, and Hypothyroidism. Dr. Wiewel is board certified in Missouri Dept Of Health/Narcotics&Dangerous Drugs , American Board Of Family Medicine , Missouri State Board Of Registration, American Board Of Obesity Medicine , and Drug Enforcement Administration . Dr. Wiewel is currently accepting new patients.

    Experienced in Sinusitis
    General Surgery | Otolaryngology
    Experienced in Sinusitis
    General Surgery | Otolaryngology
    Referral may be required
    300 Winding Woods Drive, Suite 502S, 
    O Fallon, MO 
     (1.8 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Jason Hanson is a General Surgeon and an Otolaryngologist practicing medicine in O Fallon, Missouri. Dr. Hanson is rated as an Experienced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Jones Syndrome, DFNB1, Infant Hearing Loss, and Otitis. Dr. Hanson is board certified in American Board Of Otolaryngology , Missouri Dept Of Health/Narcotics&Dangerous Drugs , Missouri State Board Of Registration, and Drug Enforcement Administration . Dr. Hanson is currently accepting new patients.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    BJC Medical Group At O'Fallon

    2630 Highway K, 
    O Fallon, MO 
     (2.7 miles away)
    Languages Spoken:
    English, Spanish

    Timothy Moore is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Moore is rated as an Experienced provider by MediFind in the treatment of Sinusitis. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Peptic Ulcer, Necrosis, Chronic Cough, and Cellulitis.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    BJC Medical Group At O'Fallon

    2630 Highway K, 
    O Fallon, MO 
     (2.7 miles away)
    Languages Spoken:
    English

    Judith Dibble is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Dibble is rated as an Experienced provider by MediFind in the treatment of Sinusitis. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, Breast Cancer, and Nephrosclerosis.

    Experienced in Sinusitis
    Family Medicine
    Experienced in Sinusitis
    Family Medicine

    Office

    300 Winding Woods Dr Ste 222, 
    O Fallon, MO 
     (3.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Alyssa Keller is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Keller is rated as an Experienced 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 Phantom Limb Pain, Generalized Anxiety Disorder (GAD), High Cholesterol, and Hypertension. Dr. Keller is currently accepting new patients.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    Office

    300 Winding Woods Dr Ste 218, 
    O Fallon, MO 
     (3.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    James Ketchum is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Ketchum 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 Sitosterolemia, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension. Dr. Ketchum is currently accepting new patients.

    Experienced in Sinusitis
    Internal Medicine
    Experienced in Sinusitis
    Internal Medicine

    Outreach Specialty Physicians LLC

    300 Winding Woods Dr Ste 214, 
    O Fallon, MO 
     (3.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Kent Cassmeyer is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Cassmeyer is rated as an Experienced provider by MediFind in the treatment of Sinusitis. His clinical expertise encompasses High Cholesterol, Cirrhosis, Familial Combined Hyperlipidemia, and Xanthoma. Dr. Cassmeyer is currently accepting new patients.

    Showing 1-20 of 116

    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 O Fallon, MO?

    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 O Fallon, MO?

    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 O Fallon, MO?

    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 O Fallon, MO?

    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 O Fallon, MO?

    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 O Fallon, MO?

    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 O Fallon, MO?

    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.