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    Last Updated: 10/30/2025

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    MediFind found 65 doctor with experience in Ulcerative Colitis near Fontana, CA. Of these, 61 are Experienced and 4 are Advanced.

    Location
    LocationClose
    65 providers found
      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine
      8110 Mango Ave, Suite 104, 
      Fontana, CA 
       (0.9 miles away)
      Languages Spoken:
      English

      Duc Nguyen is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Nguyen is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Osteomyelitis in Children, Type 2 Diabetes (T2D), High Cholesterol, and Purpura.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine
      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English

      Lester Tsai is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Tsai is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Hemorrhagic Proctocolitis, and Viral Gastroenteritis.

      What does Elite, Distinguished, Advanced, Experienced mean?
      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Southern California Permanente Medical Group

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

      Jessica Hong is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Hong is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. Her top areas of expertise are Hepatitis B, Esophageal Varices, Banti's Syndrome, and Diverticular Disease.

      Learn about our expert tiers
      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      Fontana Medical Center

      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Tommy Oei is a Gastroenterologist in Fontana, California. Dr. Oei is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Alcoholic Cirrhosis, Choledocholithiasis, Gallstones, Bile Duct Stricture, and Endoscopy. Dr. Oei is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Fontana Medical Center

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

      Kanchana Keerthipala is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Keerthipala is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. Her top areas of expertise are Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, Post-Splenectomy Syndrome, and Chronic Pain.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Fontana Medical Center

      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Experience:
      16+ years
      Languages Spoken:
      English
      Accepting New Patients

      Long Nguyendo is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Nguyendo has been practicing medicine for over 16 years and is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, Osteomyelitis in Children, and Obesity. Dr. Nguyendo is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Fontana Medical Center

      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Edward Im is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Im is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, Maturity Onset Diabetes of the Young, and Type 2 Diabetes (T2D). Dr. Im is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      Fontana Medical Center

      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Alexander Han is a Gastroenterologist in Fontana, California. Dr. Han is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Esophageal Varices, Hemorrhoids, Banti's Syndrome, Mallory-Weiss Syndrome, and Endoscopy. Dr. Han is currently accepting new patients.

      Experienced in Ulcerative Colitis
      General Practice | Internal Medicine
      Experienced in Ulcerative Colitis
      General Practice | Internal Medicine

      Fontana Medical Center

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

      Tsung Tsai is a primary care provider, practicing in Internal Medicine and General Practice in Fontana, California. Dr. Tsai is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Acute Respiratory Distress Syndrome (ARDS), Childhood Iron Deficiency Anemia, Type 2 Diabetes (T2D), and Iron Deficiency Anemia.

      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      Fontana Medical Center

      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Michael Chan is a Gastroenterologist in Fontana, California. Dr. Chan is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Mallory-Weiss Syndrome, Esophageal Varices, Bile Duct Obstruction, Bile Acid Malabsorption, and Endoscopy. Dr. Chan is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Pediatric Gastroenterology | Pediatrics
      Experienced in Ulcerative Colitis
      Pediatric Gastroenterology | Pediatrics
      9961 Sierra Ave, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English

      Bruce Grill is a Pediatric Gastroenterologist and a Pediatrics provider in Fontana, California. Dr. Grill is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Delayed Growth, Autism Spectrum Disorder, Encopresis, and Colitis.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Southern California Permanente Medical Group

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

      Kok-fon Lee is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Lee is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Bronchitis, Type 2 Diabetes (T2D), Opisthotonos, and Muscle Spasms.

      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      Fontana Medical Center

      9961 Sierra Avenue, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Jeremy Wang is a Gastroenterologist in Fontana, California. Dr. Wang is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Painful Swallowing, Swallowing Difficulty, Trichohepatoenteric Syndrome, and Diarrhea. Dr. Wang is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Kaiser Permanente Fontana Medical Center

      9961 Sierra Avenue, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English

      Sena St. John is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. St. John is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. Her top areas of expertise are Marginal Zone Lymphoma (MZL), Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, and Type 2 Diabetes (T2D).

      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      Fontana Medical Center

      9961 Sierra Avenue, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Timothy Kuo is a Gastroenterologist in Fontana, California. Dr. Kuo is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Bile Acid Malabsorption, Hemorrhoids, Visceromegaly, Alcoholic Cirrhosis, and Endoscopy. Dr. Kuo is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Internal Medicine
      Experienced in Ulcerative Colitis
      Internal Medicine

      Kaiser Permanente Fontana Medical Center - Internal Medicine Department

      9961 Sierra Avenue, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients
      Offers Telehealth

      Terence Sonuga is a primary care provider, practicing in Internal Medicine in Fontana, California. Dr. Sonuga is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Childhood Iron Deficiency Anemia, Asthma, Iron Deficiency Anemia, and Asthma in Children. Dr. Sonuga is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      Fontana Medical Center

      9961 Sierra Avenue, 
      Fontana, CA 
       (1.3 miles away)
      Languages Spoken:
      English
      Accepting New Patients

      Robert Kung is a Gastroenterologist in Fontana, California. Dr. Kung is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Gastritis, Esophageal Varices, Alcoholic Cirrhosis, Hemorrhoids, and Endoscopy. Dr. Kung is currently accepting new patients.

      Experienced in Ulcerative Colitis
      Gastroenterology
      Experienced in Ulcerative Colitis
      Gastroenterology

      San Bernardino Gastroenterology Associates Inc

      2006 N Riverside Ave, Suite B, 
      Rialto, CA 
       (4.8 miles away)
      Languages Spoken:
      English

      Anas Kawayeh is a Gastroenterologist in Rialto, California. Dr. Kawayeh is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Gastrointestinal Bleeding, Gallstones, Cholestasis, Gastrectomy, and Gastrostomy.

      Advanced in Ulcerative Colitis
      Gastroenterology
      Advanced in Ulcerative Colitis
      Gastroenterology

      Platinum Digestive Health

      9481 Pittsburgh Ave, Suite 200, 
      Rancho Cucamonga, CA 
       (6.9 miles away)
      Languages Spoken:
      English

      Bhavesh Patel is a Gastroenterologist in Rancho Cucamonga, California. Dr. Patel is rated as an Advanced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Swallowing Difficulty, Painful Swallowing, Bile Duct Obstruction, Endoscopy, and Gastrostomy.

      Experienced in Ulcerative Colitis
      Family Medicine
      Experienced in Ulcerative Colitis
      Family Medicine
      8231 Rochester Ave, Suite 110, 
      Rancho Cucamonga, CA 
       (6.3 miles away)
      Languages Spoken:
      English
      Offers Telehealth

      Ravinder Singh is a primary care provider, practicing in Family Medicine in Rancho Cucamonga, California. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His top areas of expertise are Hypercalcemia, Milk-Alkali Syndrome, Type 2 Diabetes (T2D), Hormone Replacement Therapy (HRT), and Parathyroidectomy.

      Showing 1-20 of 65

      Last Updated: 10/30/2025

      What is the definition of Ulcerative Colitis?

      Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD) characterized by the development of ulcers in the lining of the digestive tract, which most often affect the colon and rectum. While ulcerative colitis can occur at any age, it most frequently appears between the ages of 15 and 30, or after the age of 60. There are several types of ulcerative colitis that are categorized by the area of the digestive tract affected by the disease, such as ulcerative proctitis (inflammation of area closest to the rectum), proctosigmoiditis (inflammation of the sigmoid colon and rectum), left-sided colitis (inflammation of descending colon, sigmoid colon, and rectum), pancolitis (inflammation of the entire colon), and a rare form of ulcerative colitis known as acute severe ulcerative colitis (severe inflammation of entire colon). Ulcerative colitis can also affect other areas of the body, causing inflammation of the skin, eyes, liver, joints, and back.

      When should I see an Ulcerative Colitis doctor near Fontana, 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 Ulcerative Colitis doctor near Fontana, 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 Ulcerative Colitis doctors near Fontana, 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 Ulcerative Colitis doctors near Fontana, 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 Ulcerative Colitis doctor near Fontana, 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 Ulcerative Colitis doctor search results page. 

      Why is it important to get a second opinion from a different Ulcerative Colitis 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 Ulcerative Colitis doctor near Fontana, 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 Ulcerative Colitis 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 Ulcerative Colitis 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 Ulcerative Colitis doctors near Fontana, CA?

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

      Look for the filter feature on the left-side of the Ulcerative Colitis 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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