The 20 Best Collagenous Colitis Doctors Near Me in Portland, OR

Find the Top Collagenous Colitis Experts and Specialists

The 20 Best Collagenous Colitis Doctors near Portland, OR

Last Updated: 02/22/2026

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MediFind found 36 doctor with experience in Collagenous Colitis near Portland, OR. Of these, 33 are Experienced and 3 are Advanced.

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36 providers found
    Advanced in Collagenous Colitis

    Dr. Elliot N. Joo
    Gastroenterology
    Advanced in Collagenous Colitis

    Dr. Elliot N. Joo
    Gastroenterology
    9701 Southwest Barnes Road, Suite 300, 
    Portland, OR 
     (4.5 miles away)
    503-297-8081
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    Elliot Joo is a Gastroenterologist in Portland, Oregon. Dr. Joo is rated as an Advanced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Enlarged Liver, Pancreatic Cancer, Familial Pancreatic Cancer, Endoscopy, and Gastrectomy. Dr. Joo is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Chris B. Hyun
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Chris B. Hyun
    Gastroenterology
    800 Southwest 13th Avenue, 
    Portland, OR 
     (1.6 miles away)
    503-221-0161
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients

    Chris Hyun is a Gastroenterologist in Portland, Oregon. Dr. Hyun is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Familial Adenomatous Polyposis, Turcot Syndrome, Heartburn, and Gardner Syndrome. Dr. Hyun is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Young K. Choi
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Young K. Choi
    Gastroenterology
    800 Southwest 13th Avenue, 
    Portland, OR 
     (1.6 miles away)
    503-221-0161
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    Young Choi is a Gastroenterologist in Portland, Oregon. Dr. Choi is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Hemorrhoids, Familial Adenomatous Polyposis, Turcot Syndrome, Endoscopy, and Gastrectomy. Dr. Choi is currently accepting new patients.

    Learn about our expert tiers
    Experienced in Collagenous Colitis

    Dr. David M. Grunkemeier
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. David M. Grunkemeier
    Gastroenterology
    9701 Southwest Barnes Road, Suite 300, 
    Portland, OR 
     (4.5 miles away)
    503-297-8081
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    David Grunkemeier is a Gastroenterologist in Portland, Oregon. Dr. Grunkemeier is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Familial Adenomatous Polyposis, Colonoscopy, and Gastrectomy. Dr. Grunkemeier is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Sarah A. Rodriguez
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Sarah A. Rodriguez
    Gastroenterology
    9701 Southwest Barnes Road, Suite 300, 
    Portland, OR 
     (4.5 miles away)
    503-297-8081
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    Sarah Rodriguez is a Gastroenterologist in Portland, Oregon. Dr. Rodriguez is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Cholestasis, Bile Duct Obstruction, Bile Duct Stricture, Endoscopy, and Gastrectomy. Dr. Rodriguez is currently accepting new patients.

    Advanced in Collagenous Colitis

    Dr. Amnon Sonnenberg
    Gastroenterology
    Advanced in Collagenous Colitis

    Dr. Amnon Sonnenberg
    Gastroenterology

    Office

    3710 SW US Veterans Hospital Rd, 
    Portland, OR 
     (1.3 miles away)
    503-220-8262
    Languages Spoken:
    English
    See accepted insurances

    Amnon Sonnenberg is a Gastroenterologist in Portland, Oregon. Dr. Sonnenberg is rated as an Advanced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Helicobacter Pylori Infection, Gastritis, Viral Gastroenteritis, Endoscopy, and Colonoscopy.

    Experienced in Collagenous Colitis

    Dr. Sarah Diamond
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Sarah Diamond
    Gastroenterology

    OHSU Hospital

    3181 SW Sam Jackson Park Rd, 
    Portland, OR 
     (1.3 miles away)
    503-494-8311
    Languages Spoken:
    English
    See accepted insurances
    Offers Telehealth

    Sarah Diamond is a Gastroenterologist in Portland, Oregon. Dr. Diamond is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Colitis, Achalasia, Gastroparesis, Endoscopy, and Gastrectomy.

    Experienced in Collagenous Colitis

    Dr. Elisa Boden
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Elisa Boden
    Gastroenterology

    Office

    3485 S Bond Ave Bldg 2, 
    Portland, OR 
     (1.8 miles away)
    503-494-4373
    Languages Spoken:
    English
    See accepted insurances
    Offers Telehealth

    Elisa Boden is a Gastroenterologist in Portland, Oregon. Dr. Boden is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Crohn's Disease, Ulcerative Colitis, Colitis, Endoscopy, and Gastrectomy.

    Experienced in Collagenous Colitis

    Dr. Pamela Miner
    Palliative Medicine
    Experienced in Collagenous Colitis

    Dr. Pamela Miner
    Palliative Medicine

    Housecall Providers Services LLC

    5100 S Macadam Ave Ste 200, 
    Portland, OR 
     (1.8 miles away)
    971-202-5500
    Languages Spoken:
    English
    See accepted insurances

    Pamela Miner is a primary care provider, practicing in Palliative Medicine in Portland, Oregon. Dr. Miner is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Malnutrition, Short Bowel Syndrome, Small Bowel Bacterial Overgrowth, and Alcoholic Neuropathy.

    Experienced in Collagenous Colitis

    Dr. Jane Ware
    Internal Medicine
    Experienced in Collagenous Colitis

    Dr. Jane Ware
    Internal Medicine

    Legacy Medical Group-Broadway-A Department Of Legacy Emanuel Medical Center

    1600 NE Broadway St, 
    Portland, OR 
     (2.1 miles away)
    503-525-7599
    Languages Spoken:
    English
    See accepted insurances
    Offers Telehealth

    Jane Ware is a primary care provider, practicing in Internal Medicine in Portland, Oregon. Dr. Ware is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Musculocontractural Ehlers-Danlos Syndrome (mcEDS), Ehlers-Danlos Syndrome (EDS), Mast Cell Activation Syndrome (MCAS), and Meige Disease.

    Experienced in Collagenous Colitis

    Dr. Nicole Weksler
    Internal Medicine
    Experienced in Collagenous Colitis

    Dr. Nicole Weksler
    Internal Medicine

    Legacy Medical Group-Broadway-A Department Of Legacy Emanuel Medical Center

    1600 NE Broadway St, 
    Portland, OR 
     (2.1 miles away)
    503-525-7599
    Languages Spoken:
    English
    See accepted insurances
    Offers Telehealth

    Nicole Weksler is a primary care provider, practicing in Internal Medicine in Portland, Oregon. Dr. Weksler is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Granulomatosis with Polyangiitis, Necrotizing Vasculitis, Insomnia, and Sitosterolemia.

    Experienced in Collagenous Colitis

    Dr. Diane Williams
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Diane Williams
    Gastroenterology

    Metro Anesthesia LLC

    9701 SW Barnes Rd Ste 300, 
    Portland, OR 
     (4.5 miles away)
    503-692-1836
    Languages Spoken:
    English
    See accepted insurances

    Diane Williams is a Gastroenterologist in Portland, Oregon. Dr. Williams is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Ulcerative Colitis, Familial Adenomatous Polyposis, Painful Swallowing, Swallowing Difficulty, and Gastrectomy.

    Experienced in Collagenous Colitis

    Dr. Glenn Eisen
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Glenn Eisen
    Gastroenterology

    Office

    9701 SW Barnes Rd, 
    Portland, OR 
     (4.7 miles away)
    503-297-8081
    Languages Spoken:
    English
    See accepted insurances

    Glenn Eisen is a Gastroenterologist in Portland, Oregon. Dr. Eisen is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Gastrointestinal Bleeding, Barrett Esophagus, Angiodysplasia of the Colon, Colonoscopy, and Endoscopy.

    Experienced in Collagenous Colitis

    Dr. James K. Regan
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. James K. Regan
    Gastroenterology
    1111 Northeast 99th Avenue, Suite 301, 
    Portland, OR 
     (6.2 miles away)
    503-963-2707
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients

    James Regan is a Gastroenterologist in Portland, Oregon. Dr. Regan is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Bile Duct Obstruction, Swallowing Difficulty, Painful Swallowing, Endoscopy, and Gastrectomy. Dr. Regan is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Hong Shen
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Hong Shen
    Gastroenterology
    1111 Northeast 99th Avenue, Suite 301, 
    Portland, OR 
     (6.2 miles away)
    503-963-2707
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients

    Hong Shen is a Gastroenterologist in Portland, Oregon. Dr. Shen is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Familial Adenomatous Polyposis, Gardner Syndrome, Turcot Syndrome, and Crohn's Disease. Dr. Shen is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Rebecca A. Fausel
    Internal Medicine | Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Rebecca A. Fausel
    Internal Medicine | Gastroenterology
    1111 Northeast 99th Avenue, Suite 301, 
    Portland, OR 
     (6.2 miles away)
    503-963-2707
    Experience:
    18+ years
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    Rebecca Fausel is an Internal Medicine specialist and a Gastroenterologist in Portland, Oregon. Dr. Fausel has been practicing medicine for over 18 years and is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Ulcerative Colitis, Crohn's Disease, Colitis, Colonoscopy, and Endoscopy. Dr. Fausel is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Don F. Lum
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Don F. Lum
    Gastroenterology
    1111 Northeast 99th Avenue, Suite 301, 
    Portland, OR 
     (6.2 miles away)
    503-963-2707
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    Don Lum is a Gastroenterologist in Portland, Oregon. Dr. Lum is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Painful Swallowing, Swallowing Difficulty, and Endoscopy. Dr. Lum is currently accepting new patients.

    Advanced in Collagenous Colitis

    Dr. Swapna B. Reddy
    Gastroenterology
    Advanced in Collagenous Colitis

    Dr. Swapna B. Reddy
    Gastroenterology
    19250 Southwest 90th Avenue, 
    Tualatin, OR 
     (10.9 miles away)
    503-692-3750
    Languages Spoken:
    English
    See accepted insurances
    Accepting New Patients
    Offers Telehealth

    Swapna Reddy is a Gastroenterologist in Tualatin, Oregon. Dr. Reddy is rated as an Advanced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Collagenous Colitis, Crohn's Disease, Colitis, Familial Adenomatous Polyposis, and Endoscopy. Dr. Reddy is currently accepting new patients.

    Experienced in Collagenous Colitis

    Dr. Anne Breitinger
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Anne Breitinger
    Gastroenterology

    Providence Health & Services Oregon

    10150 SE 32nd Ave, 
    Portland, OR 
     (5.2 miles away)
    503-215-5895
    Languages Spoken:
    English
    See accepted insurances

    Anne Breitinger is a Gastroenterologist in Portland, Oregon. Dr. Breitinger is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Familial Adenomatous Polyposis, Trichohepatoenteric Syndrome, Diarrhea, Gastrectomy, and Endoscopy.

    Experienced in Collagenous Colitis

    Dr. Debbie Cheng
    Gastroenterology
    Experienced in Collagenous Colitis

    Dr. Debbie Cheng
    Gastroenterology

    The Oregon Clinic Gastroenterology East At Gateway

    1111 NE 99th Ave, 
    Portland, OR 
     (5.7 miles away)
    503-963-2707
    Languages Spoken:
    English
    See accepted insurances

    Debbie Cheng is a Gastroenterologist in Portland, Oregon. Dr. Cheng is rated as an Experienced provider by MediFind in the treatment of Collagenous Colitis. Her top areas of expertise are Colitis, Viral Gastroenteritis, Collagenous Colitis, and Ulcerative Colitis.

    Showing 1-20 of 36

    Last Updated: 02/22/2026

    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 Portland, OR?

    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 Portland, OR?

    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 do I find the best Collagenous Colitis doctor near Portland, OR?

    You can find a Collagenous Colitis doctor in any of the 10 largest U.S. cities by clicking below:

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    Collagenous Colitis doctor near Atlanta, GA
    Collagenous Colitis doctor near Boston, MA
    Collagenous Colitis doctor near Dallas, TX
    Collagenous Colitis doctor near San Jose, CA

    How does MediFind rank Collagenous Colitis doctors near Portland, OR?

    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 Portland, OR?

    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 Portland, OR?

    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 Portland, OR?

    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 Portland, OR?

    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 

    Read more about our Content Policy. 

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