The 20 Best Colonoscopy Doctors near Tustin, CA

Find the Experts and Specialists who perform Colonoscopy

Last Updated: 02/22/2026

Save doctors for later
Sign Up
Not sure about your diagnosis?
Check Your Symptoms
Already have a doctor?
Find A Second Opinion

MediFind found 188 doctor with experience in Colonoscopy near Tustin, CA. Of these, 169 are Experienced, 17 are Advanced, 1 are Distinguished and 1 are Elite.

Location
LocationClose
188 providers found
    Elite in Colonoscopy
    Gastroenterology
    Elite in Colonoscopy
    Gastroenterology

    UCI Health H.H. Chao Comprehensive Digestive Disease Center

    101 The City Dr S Bldg 22C, 
    Orange, CA 
     (4.4 miles away)
    Languages Spoken:
    English

    Jason Samarasena is a Gastroenterologist in Orange, California. Dr. Samarasena is rated as an Elite provider by MediFind in Colonoscopy. His top areas of expertise are Barrett Esophagus, Jaundice, Gastroesophageal Reflux Disease (GERD), Endoscopy, and Colonoscopy.

    Imran Sharief
    Experienced in Colonoscopy
    Pulmonary Medicine | Sleep Medicine
    Experienced in Colonoscopy
    Pulmonary Medicine | Sleep Medicine

    Imran Sharief, MD Private Practice

    1901 E 4th St, 
    Santa Ana, CA 
     (1.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    I seek to provide the most complete care to my patients in a caring and respectful way. Dr. Sharief is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Hospital-Acquired Pneumonia, Atypical Pneumonia, Pneumonia, Obstructive Sleep Apnea, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology
    17400 Irvine Boulevard, Suite F, 
    Tustin, CA 
     (0.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Khaldoun Debian is a Gastroenterologist in Tustin, California. Dr. Debian is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Gardner Syndrome, Familial Adenomatous Polyposis, Turcot Syndrome, Endoscopy, and Gastrectomy. Dr. Debian is currently accepting new patients.

    Learn about our expert tiers
    Experienced in Colonoscopy
    General Surgery
    Experienced in Colonoscopy
    General Surgery

    Office

    333 City Blvd W Ste 850, 
    Orange, CA 
     (4.4 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Joseph Carmichael is a General Surgeon in Orange, California. Dr. Carmichael is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Rectal Prolapse, Appendectomy, and Ileostomy.

    Experienced in Colonoscopy
    Colorectal Surgery
    Experienced in Colonoscopy
    Colorectal Surgery
    363 South Main Street, Suite 420, 
    Orange, CA 
     (4.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Anita Gregory is a Colorectal Surgeon in Orange, California. Dr. Gregory is rated as an Experienced provider by MediFind in Colonoscopy. Her top areas of expertise are Familial Colorectal Cancer, Rectocele, Rectal Prolapse, Hernia Surgery, and Bladder Reconstruction. Dr. Gregory is currently accepting new patients.

    Experienced in Colonoscopy
    General Surgery
    Experienced in Colonoscopy
    General Surgery

    UCI Health

    101 The City Dr S, 
    Orange, CA 
     (5.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Skandan Shanmugan is a General Surgeon in Orange, California. Dr. Shanmugan is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Genital Warts, Hernia Surgery, and Ileostomy.

    Experienced in Colonoscopy
    General Surgery
    Experienced in Colonoscopy
    General Surgery

    UCI Health

    101 The City Dr S, 
    Orange, CA 
     (5.0 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Steven Mills is a General Surgeon in Orange, California. Dr. Mills is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Ogilvie Syndrome, Familial Colorectal Cancer, Colorectal Cancer, Ileostomy, and Endoscopy.

    Advanced in Colonoscopy
    Family Medicine
    Advanced in Colonoscopy
    Family Medicine

    Santa Ana Mammography

    1900 E 4th St, 
    Santa Ana, CA 
     (1.0 miles away)
    Languages Spoken:
    English

    William Hsu is a primary care provider, practicing in Family Medicine in Santa Ana, California. Dr. Hsu is rated as an Advanced provider by MediFind in Colonoscopy. His top areas of expertise are Lung Nodules, Lung Cancer, Colorectal Polyps, Colonoscopy, and Endoscopy.

    Advanced in Colonoscopy
    Gastroenterology
    Advanced in Colonoscopy
    Gastroenterology

    UCI Health H.H. Chao Comprehensive Digestive Disease Center

    101 The City Dr S Bldg 22C, 
    Orange, CA 
     (4.4 miles away)
    Languages Spoken:
    English

    John Lee is a Gastroenterologist in Orange, California. Dr. Lee is rated as an Advanced provider by MediFind in Colonoscopy. His top areas of expertise are Jaundice, Pancreatic Pseudocyst, Pancreatic Cancer, Endoscopy, and Colonoscopy.

    Essam Quraishi
    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Sing L Tung M.D. A Professional Corporation

    2621 S Bristol St Ste 202, 
    Santa Ana, CA 
     (4.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Essam Quraishi is a Gastroenterologist in Santa Ana, California. Dr. Quraishi is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Chronic Erosive Gastritis, Gastritis, Nonalcoholic Steatohepatitis (NASH), Gastrectomy, and Gastrostomy.

    Advanced in Colonoscopy
    Internal Medicine
    Advanced in Colonoscopy
    Internal Medicine

    UCI Health

    101 The City Dr S, 
    Orange, CA 
     (5.0 miles away)
    Languages Spoken:
    English

    Nathan Park is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Park is rated as an Advanced provider by MediFind in Colonoscopy. His top areas of expertise are Scrotal Swelling, Testicular Cancer, Gastrointestinal Bleeding, Colonoscopy, and Endoscopy.

    Advanced in Colonoscopy
    Internal Medicine
    Advanced in Colonoscopy
    Internal Medicine

    Uc Irvine Hospitalist Program

    101 The City Dr S, 
    Orange, CA 
     (5.0 miles away)
    Languages Spoken:
    English

    Erica Duh is a primary care provider, practicing in Internal Medicine in Orange, California. Dr. Duh is rated as an Advanced provider by MediFind in Colonoscopy. Her top areas of expertise are Colorectal Cancer, Kaposi Sarcoma, Diverticular Disease, Colonoscopy, and Endoscopy.

    Kenneth Chang
    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    UCI Health

    101 The City Dr S, 
    Orange, CA 
     (5.0 miles away)
    Languages Spoken:
    English

    Kenneth Chang is a Gastroenterologist in Orange, California. Dr. Chang is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Hiatal Hernia, Gastroesophageal Reflux Disease (GERD), Barrett Esophagus, Endoscopy, and Colonoscopy.

    Distinguished in Colonoscopy
    Gastroenterology
    Distinguished in Colonoscopy
    Gastroenterology
    27799 Medical Center Road, Suite 320, 
    Mission Viejo, CA 
     (12.8 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Douglas Nguyen is a Gastroenterologist in Mission Viejo, California. Dr. Nguyen is rated as a Distinguished provider by MediFind in Colonoscopy. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Hemorrhagic Proctocolitis, Colonoscopy, and Endoscopy. Dr. Nguyen is currently accepting new patients.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Won K Yu MD

    17400 Irvine Blvd, 
    Tustin, CA 
     (0.5 miles away)
    Experience:
    26+ years
    Languages Spoken:
    English
    Offers Telehealth

    Won Yu is an Internal Medicine provider in Tustin, California. Dr. Yu has been practicing medicine for over 26 years and is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Indigestion, Pancreatic Pseudocyst, Familial Adenomatous Polyposis, Gastrectomy, and Gastrostomy.

    Experienced in Colonoscopy
    Nephrology
    Experienced in Colonoscopy
    Nephrology

    Uc Irvine Health Medical Group-Tustin Fam Med

    1451 Irvine Blvd, 
    Tustin, CA 
     (1.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Fatima Malik is a Nephrologist in Tustin, California. Dr. Malik is rated as an Experienced provider by MediFind in Colonoscopy. Her top areas of expertise are Acute Kidney Failure, Chronic Kidney Disease, End-Stage Renal Disease (ESRD), Kidney Transplant, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Uc Irvine Health Medical Group-Tustin Fam Med

    1451 Irvine Blvd, 
    Tustin, CA 
     (1.1 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Carlos Saad is a Gastroenterologist in Tustin, California. Dr. Saad is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Gastric Dysmotility, Gastroesophageal Reflux Disease (GERD), Visceromegaly, Celiac Disease, and Colonoscopy.

    Experienced in Colonoscopy
    Family Medicine
    Experienced in Colonoscopy
    Family Medicine

    Altamed Medical And Dental Group-Santa Ana Main

    1400 N Main St, 
    Santa Ana, CA 
     (2.8 miles away)
    Languages Spoken:
    English

    Jeffrey Arroyo is a primary care provider, practicing in Family Medicine in Santa Ana, California. Dr. Arroyo is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Familial Colorectal Cancer, Osteomyelitis in Children, Type 2 Diabetes (T2D), Colonoscopy, and Endoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Genesis Healthcare Partners PC

    1010 W La Veta Ave, 
    Orange, CA 
     (3.5 miles away)
    Experience:
    25+ years
    Languages Spoken:
    English
    Offers Telehealth

    Hardeep Singh is a Gastroenterologist in Orange, California. Dr. Singh has been practicing medicine for over 25 years and is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Barrett Esophagus, Esophageal Varices, Pancreatic Cancer, Gastrostomy, and Gastrectomy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Genesis Healthcare Partners PC

    1010 W La Veta Ave, 
    Orange, CA 
     (3.5 miles away)
    Experience:
    36+ years
    Languages Spoken:
    English
    Offers Telehealth

    James Lee is a Gastroenterologist in Orange, California. Dr. Lee has been practicing medicine for over 36 years and is rated as an Experienced provider by MediFind in Colonoscopy. His top areas of expertise are Gas Bloat Syndrome, Familial Adenomatous Polyposis, Gastroesophageal Reflux Disease (GERD), Gastrostomy, and Endoscopy.

    Showing 1-20 of 188

    Last Updated: 02/22/2026

    What is the definition of Colonoscopy?

    A colonoscopy is an exam that views the inside of the colon (large intestine) and rectum, using a tool called a colonoscope.

    The colonoscope has a small camera attached to a flexible tube that can reach the entire length of the colon.

    When should I see a Colonoscopy doctor near Tustin, 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 Colonoscopy doctor near Tustin, 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 Colonoscopy doctors near Tustin, 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 Colonoscopy doctors near Tustin, 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 Colonoscopy doctor near Tustin, 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 Colonoscopy doctor search results page. 

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

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

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