The 20 Best Irritable Bowel Syndrome (IBS) Doctors Near Me in Thousand Oaks, CA

Find the Top Irritable Bowel Syndrome (IBS) Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 54 doctor with experience in Irritable Bowel Syndrome (IBS) near Thousand Oaks, CA. Of these, 48 are Experienced and 4 are Advanced.

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54 providers found
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    Arroyo Oaks Medical Associates, Inc

    2230 Lynn Rd Ste 200, 
    Thousand Oaks, CA 
     (3.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Dina Ohevshalom is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Ohevshalom is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Juvenile Primary Osteoporosis, Melorheostosis, Melorheostosis with Osteopoikilosis, Endoscopy, and Hip Replacement. Dr. Ohevshalom is currently accepting new patients.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    Arroyo Oaks Medical Associates, Inc

    2230 Lynn Rd Ste 200, 
    Thousand Oaks, CA 
     (3.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Russell Hines is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Hines is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, Colonoscopy, and Endoscopy. Dr. Hines is currently accepting new patients.

    Karen L. Simon
    Advanced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Advanced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Ventura County Gastroenterology Group

    4005 Mission Oaks Blvd, Ste A, 
    Camarillo, CA 
     (10.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Dr. Karen Simon received her B.A. from Stanford University in 1996. She then attended Northwestern University for medical school. She completed her residency at Cedars-Sinai Medical Center in 2004 and her fellowship at UCLA and Cedars in 2008.Dr. Simon has proudly been serving patients in Ventura County since 2008 and is very involved in field research. Dr. Simon is also a speaker for Exact Sciences on behalf of Cologuard and is actively associated in research studies. She is a part of the Takeda Chloride Channel Council and a speaker for Amitiza, as well.She enjoys educating the doctors and the community as a lecturer on topics such as colorectal cancer screening at St. John's Hospital, where she is also a part of the Ethics Committee.Dr. Simon aims specifically to work with patients to discover the problem and develop a treatment strategy. She has a particular interest in Celiac Disease, Inflammatory Bowel Disease (IBD), and a passion for improving colorectal cancer detection.She is dedicated to developing a relationship with patients by utilizing education and mutual information sharing. Dr. Simon is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Familial Adenomatous Polyposis, Swallowing Difficulty, Endoscopy, and Colonoscopy.

    Learn about our expert tiers
    Micha S. Rojany
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Ventura County Gastroenterology Group

    4005 Mission Oaks Blvd, Ste A, 
    Camarillo, CA 
     (10.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Dr. Micha Rojany was born and raised in Southern California. He received his undergraduate degree from the University of California, Berkeley. He attended USC Medical School and completed his internship and residency at Cedars-Sinai Medical Center in Los Angeles. His fellowship in Gastroenterology was completed at the University of California, Davis.Dr. Rojany has practiced in Ventura County since 2006 and is an active member of the local medical community and hospital staff at St. John's Regional Medical Center in Oxnard, and Pleasant Valley Hospital, in Camarillo. He enjoys practicing as a Gastroenterologist with special interests in inflammatory bowel disease and biliary tract diseases.As a Gastroenterologist, Dr. Rojany enjoys the depth and breadth of his field. He takes pride in providing excellent care while taking care of his patients and meeting their needs as a community specialist in digestive diseases. Dr. Rojany is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Familial Adenomatous Polyposis, Gastrointestinal Bleeding, Angiodysplasia of the Colon, Endoscopy, and Gastrectomy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    UCLA

    248 Hampshire Rd, 
    Thousand Oaks, CA 
     (1.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Craig Gluckman is an Internal Medicine provider in Thousand Oaks, California. Dr. Gluckman is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Achalasia, Gastroesophageal Reflux Disease (GERD), Bowel Incontinence, Endoscopy, and Colonoscopy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    Arroyo Oaks Medical Associates, Inc

    2230 Lynn Rd Ste 200, 
    Thousand Oaks, CA 
     (3.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Manoj Aswani is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Aswani is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are High Cholesterol, Hypertension, Familial Hypertension, Pacemaker Implantation, and Endoscopy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Family Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Family Medicine

    Arroyo Oaks Medical Associates, Inc

    2230 Lynn Rd Ste 200, 
    Thousand Oaks, CA 
     (3.1 miles away)
    Languages Spoken:
    English

    Elise Bukont is a primary care provider, practicing in Family Medicine in Thousand Oaks, California. Dr. Bukont is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Defective Apolipoprotein B-100, Heterozygous Familial Hypercholesterolemia (HeFH), Homozygous Familial Hypercholesterolemia (HoFH), Gastrostomy, and Hip Replacement.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    UCLA Heart And Vascular Services

    100 Moody Ct Ste 200, 
    Thousand Oaks, CA 
     (3.2 miles away)
    Languages Spoken:
    English

    Michael Albertson is a Gastroenterologist in Thousand Oaks, California. Dr. Albertson is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Swallowing Difficulty, Painful Swallowing, Irritable Bowel Syndrome (IBS), Endoscopy, and Gastrectomy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Gregory H Johnson MD Inc

    227 W Janss Rd Ste 215, 
    Thousand Oaks, CA 
     (3.2 miles away)
    Languages Spoken:
    English

    Gregory Johnson is a Gastroenterologist in Thousand Oaks, California. Dr. Johnson is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Gastrointestinal Bleeding, Diarrhea, Trichohepatoenteric Syndrome, Gastrectomy, and Endoscopy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    UCLA Heart And Vascular Services

    100 Moody Ct Ste 200, 
    Thousand Oaks, CA 
     (3.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Marjan Lyons is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Lyons is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Post-Traumatic Stress Disorder (PTSD), High Cholesterol, Hypothyroidism, and Obesity in Children.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    Jigar Ghelani, MD

    227 W Janss Rd Ste 110, 
    Thousand Oaks, CA 
     (3.2 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Jigar Ghelani is a primary care provider, practicing in Internal Medicine in Thousand Oaks, California. Dr. Ghelani is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Acute Kidney Failure, Hypertension, Glucocorticoid-Remediable Aldosteronism, Gastrostomy, and Colonoscopy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Thousand Oaks Primary & Specialty Care

    248 Hampshire Rd # 200, 
    Thousand Oaks, CA 
     (3.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Hamed Nayeb is a Gastroenterologist in Thousand Oaks, California. Dr. Nayeb is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Crohn's Disease, Familial Adenomatous Polyposis, Turcot Syndrome, Endoscopy, and Gastrectomy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Cristina S. Wiese. M.D. Inc.

    325 Rolling Oaks Dr Ste 100, 
    Thousand Oaks, CA 
     (3.6 miles away)
    Languages Spoken:
    English

    Cristina Wiese is a Gastroenterologist in Thousand Oaks, California. Dr. Wiese is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Gastric Dysmotility, Familial Adenomatous Polyposis, Gastroesophageal Reflux Disease (GERD), Gastrectomy, and Endoscopy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    Office

    1250 La Venta Dr Ste 207, 
    Westlake Village, CA 
     (3.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Kevin Pimstone is a primary care provider, practicing in Internal Medicine in Westlake Village, California. Dr. Pimstone is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Reactive Arthritis, Acute Interstitial Pneumonia, Cholesterol Pneumonia, and Glucocorticoid-Remediable Aldosteronism.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Office

    248 Hampshire Rd Ste 200, 
    Westlake Village, CA 
     (3.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Rimma Shaposhnikov is a Gastroenterologist in Westlake Village, California. Dr. Shaposhnikov is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Familial Adenomatous Polyposis, Gardner Syndrome, Turcot Syndrome, Endoscopy, and Gastrectomy.

    Experienced in Irritable Bowel Syndrome (IBS)
    Family Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Family Medicine

    UCLA Health Westlake Village Triunfo Primary & Specialty Care

    141 Triunfo Canyon Rd # 110, 
    Westlake Village, CA 
     (3.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Leslie Johnson is a primary care provider, practicing in Family Medicine in Westlake Village, California. Dr. Johnson is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are High Cholesterol, Irritable Bowel Syndrome (IBS), and Hypervitaminosis D.

    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine
    Experienced in Irritable Bowel Syndrome (IBS)
    Internal Medicine

    Office

    1250 La Venta Dr Ste 207, 
    Westlake Village, CA 
     (3.6 miles away)
    Languages Spoken:
    English

    Giselle Namazie is a primary care provider, practicing in Internal Medicine in Westlake Village, California. Dr. Namazie is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Type 1 Diabetes (T1D), Breast Cancer, Vertigo, and High Cholesterol.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    5800 Santa Rosa Road, Suite 149, 
    Camarillo, CA 
     (8.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Laya Nasrollah is a Gastroenterologist in Camarillo, California. Dr. Nasrollah is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Familial Adenomatous Polyposis, Diarrhea, Endoscopy, and Gastrectomy. Dr. Nasrollah is currently accepting new patients.

    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology
    Experienced in Irritable Bowel Syndrome (IBS)
    Gastroenterology

    Ventura County Gastroenterology Group

    4005 Mission Oaks Blvd, Ste A, 
    Camarillo, CA 
     (10.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Jay Guan is a Gastroenterologist in Camarillo, California. Dr. Guan is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Hemorrhoids, Hiatal Hernia, Congenital Diaphragmatic Hernia, Colonoscopy, and Gastrectomy. Dr. Guan is currently accepting new patients.

    Shawnita Preyer
    General Practice | Family Medicine
    General Practice | Family Medicine

    TSEN Healthcare

    1464 Madera Rd, PMB 1018, 
    Simi Valley, CA 
     (6.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Shawnita Preyer is a Family Medicine provider in Simi Valley, California. Her top areas of expertise are Insomnia, Hypertension, High Cholesterol, and Hypothyroidism.

    Showing 1-20 of 54

    Last Updated: 04/28/2026

    What is the definition of Irritable Bowel Syndrome (IBS)?

    Irritable bowel syndrome (IBS) is a disorder that leads to pain in abdomen and changes in bowel movements.

    IBS is not the same as inflammatory bowel disease (IBD).

    When should I see an Irritable Bowel Syndrome (IBS) doctor near Thousand Oaks, 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 Irritable Bowel Syndrome (IBS) doctor near Thousand Oaks, 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 Irritable Bowel Syndrome (IBS) doctors near Thousand Oaks, 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 Irritable Bowel Syndrome (IBS) doctors near Thousand Oaks, 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 Irritable Bowel Syndrome (IBS) doctor near Thousand Oaks, 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 Irritable Bowel Syndrome (IBS) doctor search results page. 

    Why is it important to get a second opinion from a different Irritable Bowel Syndrome (IBS) 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 Irritable Bowel Syndrome (IBS) doctor near Thousand Oaks, 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 Irritable Bowel Syndrome (IBS) 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 Irritable Bowel Syndrome (IBS) 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 Irritable Bowel Syndrome (IBS) doctors near Thousand Oaks, CA?

    Look for the filter feature on the left side of the Irritable Bowel Syndrome (IBS) 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 Irritable Bowel Syndrome (IBS) doctor that offers video calls?

    Look for the filter feature on the left-side of the Irritable Bowel Syndrome (IBS) 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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