The 20 Best Collagenous Colitis Doctors Near Me in Redwood City, CA

Find the Top Collagenous Colitis Experts and Specialists

Last Updated: 04/28/2026

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MediFind found 34 doctor with experience in Collagenous Colitis near Redwood City, CA. Of these, 33 are Experienced and 1 are Advanced.

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34 providers found
    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Peninsula Gastroenterology Medical Group,Inc.

    2900 Whipple Ave, Ste 245, 
    Redwood City, CA 
     (1.6 miles away)
    Languages Spoken:
    English, French, Greek
    Accepting New Patients
    Offers Telehealth

    Dr. Torosis is a native of Montreal, Canada and founded Peninsula Gastroenterology Medical Group in 1986. Dr. Torosis attended medical school and internship at McGill University in Montreal. In 1982 Dr. Torosis moved to California where he completed his internal medicine residency in San Diego. He attended Yale University for his fellowship in Gastroenterology and Liver Diseases. In 1986 at the completion of his fellowship, he moved to the Peninsula. Dr. Torosis is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Ulcerative Colitis, Diverticular Disease, Familial Adenomatous Polyposis, Colonoscopy, and Gastrectomy. Dr. Torosis is board certified in Internal Medicine (Sub: Gastroenterology) and Internal Medicine. Dr. Torosis is currently accepting new patients.

    Advanced in Collagenous Colitis
    Gastroenterology
    Advanced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Kian Keyashian is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Keyashian is rated as an Advanced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 36 other conditions, according to our data. His clinical expertise encompasses Viral Gastroenteritis, Crohn's Disease, Colitis, Endoscopy, and Colonoscopy.

    Experienced in Collagenous Colitis
    Internal Medicine
    Experienced in Collagenous Colitis
    Internal Medicine
    101 South San Mateo Dr., Suite 303, 
    San Mateo, CA 
     (7.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Frank Tortorice is a primary care provider, practicing in Internal Medicine in San Mateo, California. Dr. Tortorice is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Sulfite Oxidase Deficiency, Hypermethioninemia, Methylmalonic Acidemia with Homocystinuria, and Inborn Amino Acid Metabolism Disorder. Dr. Tortorice is board certified in Internal Medicine - Board Certified. Dr. Tortorice is currently accepting new patients.

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

    1720 El Camino Real Care Center

    Burlingame, CA 
     (9.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Ernest Ribera is a Gastroenterologist practicing medicine in Burlingame, California. Dr. Ribera is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Non-Alcoholic Fatty Liver Disease, Esophagitis, Barrett Esophagus, Gastroesophageal Reflux Disease (GERD), and Endoscopy. Dr. Ribera is board certified in Gastroenterology. Dr. Ribera is currently accepting new patients.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    1720 El Camino Real Care Center

    Burlingame, CA 
     (9.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Anne Thai is a Gastroenterologist practicing medicine in Burlingame, California. Dr. Thai is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. She is also highly rated in 17 other conditions, according to our data. Her clinical expertise encompasses Gastroesophageal Reflux Disease (GERD), Portal Hypertension, Gastrointestinal Bleeding, Endoscopy, and Gastrectomy. Dr. Thai is board certified in Gastroenterology. Dr. Thai is currently accepting new patients.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Sundeep Singh is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Colitis, Viral Gastroenteritis, Crohn's Disease, Ulcerative Colitis, and Gastrectomy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Sarah Streett is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Streett is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Crohn's Disease, Ulcerative Colitis, Hemorrhagic Proctocolitis, Viral Gastroenteritis, and Tissue Biopsy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    David Goldenberg is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Goldenberg is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Bacterial Gastroenteritis, Necrotizing Enterocolitis, Pseudomembranous Colitis, Gastrectomy, and Endoscopy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English

    Atul Shah is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Shah is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 21 other conditions, according to our data. His clinical expertise encompasses Hiatal Hernia, Congenital Diaphragmatic Hernia, Diverticular Disease, Endoscopy, and Gastrectomy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Irene Sonu is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Sonu is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. She is also highly rated in 40 other conditions, according to our data. Her clinical expertise encompasses Gastroparesis, Gastroesophageal Reflux Disease (GERD), Gastric Dysmotility, Endoscopy, and Colonoscopy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Uri Ladabaum is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Ladabaum is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Familial Colorectal Cancer, Familial Adenomatous Polyposis, Colonoscopy, and Endoscopy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Anesthesia Preoperative Evaluation Clinic At Stanford Medicine Outpatient Center

    420 Broadway St, 
    Redwood City, CA 
     (1.5 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Nielsen Fernandez is a Gastroenterologist practicing medicine in Redwood City, California. Dr. Fernandez is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. She is also highly rated in 27 other conditions, according to our data. Her clinical expertise encompasses Celiac Disease, Eosinophilic Esophagitis, Esophagitis, Endoscopy, and Colonoscopy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Univ. Healthcare Alliance

    321 Middlefield Rd Ste 260, 
    Menlo Park, CA 
     (3.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Tu Nguyen is a Gastroenterologist practicing medicine in Menlo Park, California. Dr. Nguyen is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 38 other conditions, according to our data. His clinical expertise encompasses Familial Adenomatous Polyposis, Turcot Syndrome, Gardner Syndrome, and Gastroesophageal Reflux Disease (GERD).

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Office

    321 Middlefield Rd Fl MC5804, 
    Menlo Park, CA 
     (3.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Rahul Verma is a Gastroenterologist practicing medicine in Menlo Park, California. Dr. Verma is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 24 other conditions, according to our data. His clinical expertise encompasses Familial Adenomatous Polyposis, Turcot Syndrome, Gardner Syndrome, and Hemorrhoids.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Univ. Healthcare Alliance

    321 Middlefield Rd Ste 260, 
    Menlo Park, CA 
     (3.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Sinda Mein is a Gastroenterologist practicing medicine in Menlo Park, California. Dr. Mein is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. She is also highly rated in 16 other conditions, according to our data. Her clinical expertise encompasses Familial Adenomatous Polyposis, Gas Bloat Syndrome, Turcot Syndrome, and Gardner Syndrome.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Dignity Health Medical Group - Sequoia

    1301 Shoreway Rd Ste 100, 
    Belmont, CA 
     (4.4 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Accepting New Patients

    Vijay Pottathil is a Gastroenterologist practicing medicine in Belmont, California. He has been practicing medicine for over 17 years. Dr. Pottathil is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Alcoholic Cirrhosis, Gardner Syndrome, Turcot Syndrome, Endoscopy, and Gastrectomy. Dr. Pottathil is currently accepting new patients.

    Experienced in Collagenous Colitis
    Internal Medicine
    Experienced in Collagenous Colitis
    Internal Medicine

    Imaging Services At Hoover Pavilion

    211 Quarry Rd, 
    Palo Alto, CA 
     (4.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Jacqueline Tai is a primary care provider, practicing in Internal Medicine in Palo Alto, California. Dr. Tai is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her clinical expertise encompasses Hereditary Angioedema, Glutamate Decarboxylase Deficiency, Thiopurine S-Methyltransferase Deficiency, and Properdin Deficiency.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Stanford Hospital And Clinics

    300 Pasteur Dr, 
    Stanford, CA 
     (4.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Edith Ho is a Gastroenterologist practicing medicine in Stanford, California. Dr. Ho is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Viral Gastroenteritis, Crohn's Disease, Ulcerative Colitis, Endoscopy, and Colonoscopy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Office

    300 Pasteur Dr, 
    Stanford, CA 
     (4.6 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Sidhartha Sinha is a Gastroenterologist practicing medicine in Stanford, California. Dr. Sinha is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Crohn's Disease, Ulcerative Colitis, Hemorrhagic Proctocolitis, Endoscopy, and Tissue Biopsy.

    Experienced in Collagenous Colitis
    Gastroenterology
    Experienced in Collagenous Colitis
    Gastroenterology

    Stanford Hospital And Clinics

    300 Pasteur Dr, 
    Stanford, CA 
     (4.6 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English
    Offers Telehealth

    Grant Barber is a Gastroenterologist practicing medicine in Stanford, California. He has been practicing medicine for over 10 years. Dr. Barber is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Ulcerative Colitis, Hemorrhagic Proctocolitis, Colitis, and Viral Gastroenteritis.

    Showing 1-20 of 34

    Last Updated: 04/28/2026

    What is the definition of Collagenous Colitis?

    Collagenous colitis is a type of inflammatory bowel disease that affects the colon. It is a form of microscopic colitis, which causes chronic diarrhea. In all forms of microscopic colitis, the colon appears normal or almost normal on colonoscopy, but the inflammation is visible when a biopsy of the colon is examined under a microscope (hence its name). People with this disease usually have between four and nine watery bowel movements per day, but in rare cases may have more than fifteen. Various other symptoms relating to the gastrointestinal system or other body symptoms may also be present. The cause of Collagenous colitis is not known but it is thought to be multifactorial. This means that both genetic and environmental factors may interact to cause a person to develop the disease. The extent to which genes play a role is unclear, but familial cases have been described. Certain medications, such as NSAIDS and proton pump inhibitors, have been reported to cause or trigger the disease in some people. However, strong evidence directly linking these medications to the disease is still lacking.

    When should I see a Collagenous Colitis doctor near Redwood City, 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 Collagenous Colitis doctor near Redwood City, 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 Collagenous Colitis doctors near Redwood City, 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 Collagenous Colitis doctors near Redwood City, 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 Collagenous Colitis doctor near Redwood City, 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 Collagenous Colitis doctor search results page. 

    Why is it important to get a second opinion from a different Collagenous 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 a Collagenous Colitis doctor near Redwood City, 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 Collagenous 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 Collagenous 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 Collagenous Colitis doctors near Redwood City, CA?

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

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