The 20 Best Diarrhea Doctors Near Me in Rancho Cucamonga, CA

Find the Top Diarrhea Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 167 doctor with experience in Diarrhea near Rancho Cucamonga, CA. Of these, 157 are Experienced, 8 are Advanced and 2 are Distinguished.

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167 providers found
    Experienced in Diarrhea
    Gastroenterology
    Experienced in Diarrhea
    Gastroenterology

    Andrea S Tieng MD, Inc

    10801 Foothill Blvd, Ste 106, 
    Rancho Cucamonga, CA 
     (1.3 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Dr. Andrea Tieng was born and raised in New York City. She graduated Summa Cum Laude from the City University of New York and completed her medical degree at the State University of New York Health Science Center at the SUNY Downstate College of Medicine in Brooklyn, New York.Her internship and residency in Internal Medicine was completed at the Albert Einstein College of Medicine at Long Island Jewish Medical Center in New Hyde Park, New York, where she also fulfilled her Gastroenterology and Hepatology Fellowship.Board Certified by the American Board of Internal Medicine, Dr. Tieng is licensed to practice in both California and New York. She is a member of the American College of Gastroenterology and the American Gastroenterology Association.Prior to founding her own practice in Redlands and San Bernardino, Dr. Tieng worked as a private gastroenterologist at Cedars-Sinai Medical Center in Los Angeles.Dr. Tieng specializes in providing sensitive and compassionate care to women, and delivers personalized care to all patients 18 years and older. Dr. Tieng is a board certified physician who treats patients with gastrointestinal illnesses and liver diseases. She utilizes innovative technology to perform diagnostic and therapeutic procedures of the gastrointestinal tract, including colonoscopy and upper endoscopy. Dr. Tieng is rated as an Experienced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 4 other conditions, according to our data. Her clinical expertise encompasses Diverticular Disease, Familial Adenomatous Polyposis, Gastritis, Gastrectomy, and Endoscopy. Dr. Tieng is board certified in Internal Medicine. Dr. Tieng is currently accepting new patients.

    Distinguished in Diarrhea
    Gastroenterology
    Distinguished in Diarrhea
    Gastroenterology

    Basim Z. Abdelkarim, M.D., Inc.

    1310 San Bernardino Rd, 
    Upland, CA 
     (2.3 miles away)
    Experience:
    27+ years
    Languages Spoken:
    English
    Offers Telehealth

    Basim Abdelkarim is a Gastroenterologist practicing medicine in Upland, California. He has been practicing medicine for over 27 years. Dr. Abdelkarim is rated as a Distinguished provider by MediFind in the treatment of Diarrhea. He is also highly rated in 67 other conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Hemorrhoids, Gastroesophageal Reflux Disease (GERD), Gastrostomy, and Endoscopy. Dr. Abdelkarim is board certified in American Board Of Internal Medicine.

    Distinguished in Diarrhea
    Gastroenterology
    Distinguished in Diarrhea
    Gastroenterology

    Ct Hung MD Inc.

    629 N 13th Ave, 
    Upland, CA 
     (2.4 miles away)
    Languages Spoken:
    English

    Chuang-ti Hung is a Gastroenterologist practicing medicine in Upland, California. Dr. Hung is rated as a Distinguished provider by MediFind in the treatment of Diarrhea. He is also highly rated in 47 other conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Trichohepatoenteric Syndrome, Hemorrhoids, Gastrectomy, and Gastrostomy.

    Learn about our expert tiers
    Advanced in Diarrhea
    Gastroenterology
    Advanced in Diarrhea
    Gastroenterology

    Carlos R. Vigil DO A Professional Corp.

    7974 Haven Ave Ste 210, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Hussein Abidali is a Gastroenterologist practicing medicine in Rancho Cucamonga, California. Dr. Abidali is rated as an Advanced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 44 other conditions, according to our data. His clinical expertise encompasses Gastrointestinal Bleeding, Hiatal Hernia, Congenital Diaphragmatic Hernia, Endoscopy, and Gastrostomy.

    Advanced in Diarrhea
    Gastroenterology
    Advanced in Diarrhea
    Gastroenterology

    Basim Z. Abdelkarim, M.D., Inc.

    1310 San Bernardino Rd, 
    Upland, CA 
     (2.3 miles away)
    Experience:
    18+ years
    Languages Spoken:
    English
    Offers Telehealth

    Priyanka Yaramada is a Gastroenterologist practicing medicine in Upland, California. She has been practicing medicine for over 18 years. Dr. Yaramada is rated as an Advanced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 27 other conditions, according to our data. Her clinical expertise encompasses Anemia, Diverticular Disease, Hemorrhoids, Gastrectomy, and Gastrostomy. Dr. Yaramada is board certified in American Board Of Internal Medicine.

    Advanced in Diarrhea
    Pediatrics
    Advanced in Diarrhea
    Pediatrics

    Kaiser Permanente Fontana Medical Center

    9961 Sierra Ave, 
    Fontana, CA 
     (9.3 miles away)
    Languages Spoken:
    English

    Andrea Thorp is a Pediatrics provider practicing medicine in Fontana, California. Dr. Thorp is rated as an Advanced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Genetic Epilepsy with Febrile Seizures Plus (GEFS+), Diarrhea, Croup, Asthma in Children, and Gastrostomy.

    Experienced in Diarrhea
    Family Medicine
    Experienced in Diarrhea
    Family Medicine

    Channell Family Medical Group

    8008 Haven Ave, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Experience:
    38+ years
    Languages Spoken:
    English

    Patricia Guevara is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. She has been practicing medicine for over 38 years. Dr. Guevara is rated as an Experienced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 14 other conditions, according to our data. Her clinical expertise encompasses Silent Thyroiditis, Precocious Puberty, Vitamin D Deficiency, and Sitosterolemia. Dr. Guevara is board certified in American Board Of Family Medicine.

    Experienced in Diarrhea
    Experienced in Diarrhea

    Little Star Healthcare Little Star Pediatric Urgent Care

    10590 Town Center Dr Ste 170, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Ravi Garehgrat is a Pediatrics provider practicing medicine in Rancho Cucamonga, California. Dr. Garehgrat is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Croup, Roseola, Aseptic and Alopecic Nodules of Scalp (AANS), and Diarrhea.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Harvey D. Cohen M.D. Inc.

    8330 Red Oak St Ste 201, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Harvey Cohen is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Cohen is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, and Obesity.

    Experienced in Diarrhea
    Experienced in Diarrhea

    Filomena S. Pascual M.D. Inc.

    8710 Monroe Ct Ste 200, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Filomena Pascual is a Pediatrics provider practicing medicine in Rancho Cucamonga, California. Dr. Pascual is rated as an Experienced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Obesity in Children, Aseptic and Alopecic Nodules of Scalp (AANS), Asthma in Children, and Autism Spectrum Disorder.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Harvey D. Cohen M.D. Inc.

    8330 Red Oak St Ste 201, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    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 Diarrhea. 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.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Our Family Medical Group Inc.

    9190 Haven Ave Ste 102, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Hetalben Makwana is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Makwana is rated as an Experienced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 11 other conditions, according to our data. Her clinical expertise encompasses Osteomyelitis in Children, Breast Cancer, Obesity, and High Cholesterol.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Carlos R. Vigil DO A Professional Corp.

    7974 Haven Ave Ste 210, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Carlos Vigil is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Vigil is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 26 other conditions, according to our data. His clinical expertise encompasses Acute Kidney Failure, Renovascular Hypertension, End-Stage Renal Disease (ESRD), Gastrostomy, and Endoscopy.

    Experienced in Diarrhea
    Family Medicine
    Experienced in Diarrhea
    Family Medicine

    Norton Delgado Family Medicine

    8283 Grove Ave Ste 202, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    Laura Norton is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Norton is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her clinical expertise encompasses Vitamin D Deficiency, High Cholesterol, Type 2 Diabetes (T2D), and Familial Hypertension.

    Experienced in Diarrhea
    Family Medicine
    Experienced in Diarrhea
    Family Medicine

    Cucamonga Valley Medical Group

    7777 Milliken Ave Ste 240, 
    Rancho Cucamonga, CA 
     (0.9 miles away)
    Languages Spoken:
    English

    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 Diarrhea. He is also highly rated in 18 other conditions, according to our data. His clinical expertise encompasses Obesity, Cirrhosis, Familial Combined Hyperlipidemia, and Xanthoma.

    Experienced in Diarrhea
    Family Medicine
    Experienced in Diarrhea
    Family Medicine

    Fagan, John A. Family Practice, Inc.

    10787 Laurel St, 
    Rancho Cucamonga, CA 
     (1.3 miles away)
    Experience:
    40+ years
    Languages Spoken:
    English
    Offers Telehealth

    John Fagan is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 40 years. Dr. Fagan is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 45 other conditions, according to our data. His clinical expertise encompasses Ehlers-Danlos Syndrome (EDS), Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension. Dr. Fagan is board certified in American Board Of Family Medicine.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Rancho Cucamonga Medical Offices

    10850 Arrow Rte, 
    Rancho Cucamonga, CA 
     (1.5 miles away)
    Languages Spoken:
    English

    Iyad Hanna is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. Dr. Hanna is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 23 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Familial Colorectal Cancer, Maturity Onset Diabetes of the Young, and Chronic Cough.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Rapid Care

    10841 White Oak Ave, 
    Rancho Cucamonga, CA 
     (1.6 miles away)
    Experience:
    46+ years
    Languages Spoken:
    English

    Zaher Azzawi is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 46 years. Dr. Azzawi is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Orbital Cellulitis, Tracheitis, Cellulitis, and Lymphangitis. Dr. Azzawi is board certified in American Board Of Internal Medicine.

    Experienced in Diarrhea
    Internal Medicine
    Experienced in Diarrhea
    Internal Medicine

    Grove Internal Medicine, Inc.

    8283 Grove Ave, 
    Rancho Cucamonga, CA 
     (2.0 miles away)
    Experience:
    28+ years
    Languages Spoken:
    English
    Offers Telehealth

    Sean To is a primary care provider, practicing in Internal Medicine in Rancho Cucamonga, California. He has been practicing medicine for over 28 years. Dr. To is rated as an Experienced provider by MediFind in the treatment of Diarrhea. 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 Familial Hypertension.

    Experienced in Diarrhea
    Pediatrics
    Experienced in Diarrhea
    Pediatrics

    Children's Choice Pediatrics

    8112 Milliken Ave, 
    Rancho Cucamonga, CA 
     (2.0 miles away)
    Experience:
    24+ years
    Languages Spoken:
    English

    Rene Salhab is a Pediatrics provider practicing medicine in Rancho Cucamonga, California. He has been practicing medicine for over 24 years. Dr. Salhab is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Obesity in Children, Roseola, Undescended Testicle, and Delayed Growth. Dr. Salhab is board certified in American Board Of Pediatrics.

    Showing 1-20 of 167

    Last Updated: 04/28/2026

    What is the definition of Diarrhea?

    Diarrhea is when you pass loose or watery stool.

    When should I see a Diarrhea doctor near Rancho Cucamonga, 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 Rancho Cucamonga, 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 Rancho Cucamonga, 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 Rancho Cucamonga, 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 Rancho Cucamonga, 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 Rancho Cucamonga, 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 Rancho Cucamonga, 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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