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    Last Updated: 02/22/2026

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    MediFind found 507 doctor with experience in Diarrhea near Fullerton, CA. Of these, 479 are Experienced, 26 are Advanced and 2 are Distinguished.

    Location
    LocationClose
    507 providers found
      Experienced in Diarrhea
      Family Medicine
      Experienced in Diarrhea
      Family Medicine

      St. Jude Heritage Brea-Primary Care Suite 110

      955 W Imperial Hwy Ste 110, 
      Brea, CA 
       (4.5 miles away)
      Languages Spoken:
      English

      Robert Ranney is a primary care provider, practicing in Family Medicine in Brea, California. Dr. Ranney is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Infant Hyperglycemia, High Cholesterol, West Nile Virus Infection, and Osteomyelitis in Children.

      Advanced in Diarrhea
      Gastroenterology | Internal Medicine
      Advanced in Diarrhea
      Gastroenterology | Internal Medicine

      Associated Gastroenterology

      1211 W La Palma Ave, 
      Anaheim, CA 
       (1.7 miles away)
      Experience:
      55+ years
      Languages Spoken:
      English
      Offers Telehealth

      Dennis Riff is an Internal Medicine specialist and a Gastroenterologist in Anaheim, California. Dr. Riff has been practicing medicine for over 55 years and is rated as an Advanced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Helicobacter Pylori Infection, Campylobacter Infection, Gastroesophageal Reflux Disease (GERD), Gastrostomy, and Gastrectomy.

      Brian P. Riff
      Experienced in Diarrhea
      Gastroenterology | Internal Medicine
      Experienced in Diarrhea
      Gastroenterology | Internal Medicine

      Associated Gastroenterology

      1211 W La Palma Ave, 
      Anaheim, CA 
       (1.7 miles away)
      Experience:
      17+ years
      Languages Spoken:
      English
      Offers Telehealth

      Brian Riff is an Internal Medicine specialist and a Gastroenterologist in Anaheim, California. Dr. Riff has been practicing medicine for over 17 years and is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Chronic Erosive Gastritis, Campylobacter Infection, Gastrostomy, and Gastrectomy.

      Learn about our expert tiers
      Advanced in Diarrhea
      Gastroenterology | Internal Medicine
      Advanced in Diarrhea
      Gastroenterology | Internal Medicine

      Digestive And Liver Disease Specialists

      1771 W Romneya Dr, 
      Anaheim, CA 
       (1.8 miles away)
      Experience:
      45+ years
      Languages Spoken:
      English

      Ravindra Alapati is an Internal Medicine specialist and a Gastroenterologist in Anaheim, California. Dr. Alapati has been practicing medicine for over 45 years and is rated as an Advanced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Visceromegaly, Bile Duct Obstruction, Diverticular Disease, Gastrostomy, and Gastrectomy.

      Advanced in Diarrhea
      Gastroenterology
      Advanced in Diarrhea
      Gastroenterology
      1837 Sunny Crest Drive, 
      Fullerton, CA 
       (2.2 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Sajen Mathews is a Gastroenterologist in Fullerton, California. Dr. Mathews is rated as an Advanced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Gastric Dysmotility, Diverticular Disease, Benign Esophageal Stricture, Endoscopy, and Gastrostomy.

      Advanced in Diarrhea
      Gastroenterology
      Advanced in Diarrhea
      Gastroenterology
      1837 Sunny Crest Drive, 
      Fullerton, CA 
       (2.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Scott Sainburg is a Gastroenterologist in Fullerton, California. Dr. Sainburg is rated as an Advanced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Benign Esophageal Stricture, Lower Esophageal Ring, Swallowing Difficulty, Endoscopy, and Gastrectomy. Dr. Sainburg is currently accepting new patients.

      Advanced in Diarrhea
      Gastroenterology
      Advanced in Diarrhea
      Gastroenterology
      1837 Sunny Crest Drive, 
      Fullerton, CA 
       (2.2 miles away)
      Languages Spoken:
      English
      Accepting New Patients
      Offers Telehealth

      Erika Hoyos is a Gastroenterologist in Fullerton, California. Dr. Hoyos is rated as an Advanced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Hemorrhoids, Intestinal Cancer, Chronic Erosive Gastritis, Endoscopy, and Gastrectomy. Dr. Hoyos is currently accepting new patients.

      Leila M. Yoonessi
      Experienced in Diarrhea
      Pediatrics | Pulmonary Medicine
      Experienced in Diarrhea
      Pediatrics | Pulmonary Medicine

      Choice Health Network

      408 S Beach Blvd, 
      Anaheim, CA 
       (4.9 miles away)
      Experience:
      17+ years
      Languages Spoken:
      English

      Dr. Leila Yoonessi is a pediatric pulmonologist practicing in Long Beach, CA.  She practices pediatric pulmonology and general pediatrics.  Dr. Yoonessi holds a BA in psychobiology with a minor in religious studies from Occidental College. She graduated cum laude and was awarded a psychobiology departmental award for her academic achievements. She then studied at the University of Southern California where she earned Master's in Public Health with a concentration in health care promotion. She went on to complete her medical degree at New York Medical College. She relocated to California to rejoin her family where she completed her pediatric residency at Los Angeles County University Southern California. She is currently a board certified pediatrician who has several research interests.  Publications include Progression and Prognostic Indicators of Bronchial and Alveolar Disease in Children with Sickle Cell Disease, and Environmental factors contributing to lung function and growth velocity decline in Sickle Cell Disease.Above all, she remains committed to patient advocacy, research, integrative work, medicine, preventive medicine, holistic health, and non-profit work.  Dr Yoonessi enjoys horseback riding, hiking with her 2 Shiba Inus and camping for fun.  Dr Yoonessi Jr. is overjoyed to be working alongside her mother who has always been dedicated to evidence based medicine, charity work, and community outreach projects!. Dr. Yoonessi is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Obesity in Children, Conjunctivitis with Pseudomembrane, Roseola, and Diarrhea.

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

      Caduceus Medical Group

      18200 Yorba Linda Blvd, Suite 250, 
      Yorba Linda, CA 
       (6.4 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 Diarrhea. His top areas of expertise are High Cholesterol, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension.

      Distinguished in Diarrhea
      Family Medicine
      Distinguished in Diarrhea
      Family Medicine

      Oc Urgent Care Medical Group

      4720 E Chapman Ave, 
      Orange, CA 
       (9.0 miles away)
      Experience:
      21+ years
      Languages Spoken:
      English
      Offers Telehealth

      Nahla Salem is a primary care provider, practicing in Family Medicine in Orange, California. Dr. Salem has been practicing medicine for over 21 years and is rated as a Distinguished provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Acute Cystitis, Otitis, Cellulitis, and Urinary Tract Infection in Children.

      Experienced in Diarrhea
      Internal Medicine
      Experienced in Diarrhea
      Internal Medicine
      907 West Wilshire Avenue, 
      Fullerton, CA 
       (0.3 miles away)
      Languages Spoken:
      English

      Arun Patel is a primary care provider, practicing in Internal Medicine in Fullerton, California. Dr. Patel is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Maturity Onset Diabetes of the Young, Neuralgia, Vertigo, Endoscopy, and Gastrostomy.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      St. Jude Heritage Fullerton-Gastroenterology

      1837 Sunny Crest Dr, 
      Fullerton, CA 
       (1.5 miles away)
      Languages Spoken:
      English

      Kumkum Patel is a Gastroenterologist in Fullerton, California. Dr. Patel is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), Gastric Dysmotility, Endoscopy, and Colonoscopy.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      National Ambulatory Hernia Institute

      1837 Sunny Crest Dr, 
      Fullerton, CA 
       (1.5 miles away)
      Languages Spoken:
      English

      Martin Carr is a Gastroenterologist in Fullerton, California. Dr. Carr is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Neuroendocrine Tumor, Gas Bloat Syndrome, Visceromegaly, and Enlarged Liver.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      Associated Gastroenterology

      1211 W La Palma Ave, 
      Anaheim, CA 
       (1.7 miles away)
      Experience:
      43+ years
      Languages Spoken:
      English

      Kevin Kuettel is a Gastroenterologist in Anaheim, California. Dr. Kuettel has been practicing medicine for over 43 years and is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Chronic Erosive Gastritis, Hiatal Hernia, Congenital Diaphragmatic Hernia, Gastrectomy, and Gastrostomy.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      Ambika Bali MD Inc

      1211 W La Palma Ave, 
      Anaheim, CA 
       (1.7 miles away)
      Experience:
      52+ years
      Languages Spoken:
      English

      Ambika Bali is a Gastroenterologist in Anaheim, California. Dr. Bali has been practicing medicine for over 52 years and is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Hemorrhoids, Menetrier Disease, Heartburn, Gastrectomy, and Colonoscopy.

      Experienced in Diarrhea
      Family Medicine
      Experienced in Diarrhea
      Family Medicine

      AHMC Anaheim Regional Medical Center

      1111 W La Palma Ave, 
      Anaheim, CA 
       (1.7 miles away)
      Languages Spoken:
      English

      Lakeisha Cox is a primary care provider, practicing in Family Medicine in Anaheim, California. Dr. Cox is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Lymphangitis, Glucocorticoid-Remediable Aldosteronism, Hypertension, and Familial Hypertension.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      Associated Gastroenterology Medical Group

      1211 W La Palma Ave Ste 306, 
      Anaheim, CA 
       (1.7 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Kavita Singh is a Gastroenterologist in Anaheim, California. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Familial Adenomatous Polyposis, Gardner Syndrome, Turcot Syndrome, Endoscopy, and Colonoscopy.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      Dr P G Rajan MD Inc

      1711 W Romneya Dr, 
      Anaheim, CA 
       (1.7 miles away)
      Languages Spoken:
      English

      Ashokkumar Amin is a Gastroenterologist in Anaheim, California. Dr. Amin is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Gastrointestinal Bleeding, Swallowing Difficulty, Painful Swallowing, Gastrostomy, and Gastrectomy.

      Experienced in Diarrhea
      Family Medicine | Geriatrics
      Experienced in Diarrhea
      Family Medicine | Geriatrics

      Anaheim Cardiology Medical Group, Inc.

      1735 W Romneya Dr, 
      Anaheim, CA 
       (1.7 miles away)
      Experience:
      22+ years
      Languages Spoken:
      English

      Reza Dolouei is a primary care provider, practicing in Family Medicine and Geriatrics in Anaheim, California. Dr. Dolouei has been practicing medicine for over 22 years and is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His top areas of expertise are Sepsis, Dysgraphia, Glucocorticoid-Remediable Aldosteronism, Gastrostomy, and Colonoscopy.

      Experienced in Diarrhea
      Gastroenterology
      Experienced in Diarrhea
      Gastroenterology

      Digestive And Liver Disease Specialists

      1771 W Romneya Dr, 
      Anaheim, CA 
       (1.8 miles away)
      Experience:
      27+ years
      Languages Spoken:
      English
      Offers Telehealth

      Amit Raina is a Gastroenterologist in Anaheim, California. Dr. Raina has been practicing medicine for over 27 years and is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her top areas of expertise are Bile Duct Obstruction, Childhood Pancreatitis, Cholestasis, Endoscopy, and Gastrostomy.

      Showing 1-20 of 507

      Last Updated: 02/22/2026

      What is the definition of Diarrhea?

      Diarrhea is when you pass loose or watery stool.

      When should I see a Diarrhea doctor near Fullerton, 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 Diarrhea doctor near Fullerton, 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 Diarrhea doctors near Fullerton, 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 Diarrhea doctors near Fullerton, 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 Diarrhea doctor near Fullerton, 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 Diarrhea doctor search results page. 

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

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

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