The 20 Best Colonoscopy Doctors near San Marcos, CA

Find the Experts and Specialists who perform Colonoscopy

Last Updated: 04/28/2026

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MediFind found 61 doctor with experience in Colonoscopy near San Marcos, CA. Of these, 58 are Experienced and 3 are Advanced.

Location
LocationClose
61 providers found
    Experienced in Colonoscopy
    General Surgery
    Experienced in Colonoscopy
    General Surgery

    Cleveland Clinic

    400 Craven Rd, 
    San Marcos, CA 
     (1.0 miles away)
    Languages Spoken:
    English

    Maysoon Ahmed is a General Surgeon practicing medicine in San Marcos, California. Dr. Ahmed is rated as an Experienced provider by MediFind in Colonoscopy. Her clinical expertise encompasses Colorectal Polyps, Colorectal Cancer, Hemorrhagic Proctocolitis, Endoscopy, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Cleveland Clinic

    400 Craven Rd, 
    San Marcos, CA 
     (1.0 miles away)
    Languages Spoken:
    English

    Carlos Simons is a Gastroenterologist practicing medicine in San Marcos, California. Dr. Simons is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 8 other conditions, according to our data. His clinical expertise encompasses Gallbladder Disease, Jaundice, Banti's Syndrome, Gastric Bypass, and Endoscopy.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Cleveland Clinic

    400 Craven Rd, 
    San Marcos, CA 
     (1.0 miles away)
    Languages Spoken:
    English

    Lora Sowunmi is a primary care provider, practicing in Internal Medicine in San Marcos, California. Dr. Sowunmi is rated as an Experienced provider by MediFind in Colonoscopy. She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Malnutrition, Autosomal Recessive Primary Microcephaly, Microcephaly, Endoscopy, and Colonoscopy.

    Learn about our expert tiers
    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Cleveland Clinic

    400 Craven Rd, 
    San Marcos, CA 
     (1.0 miles away)
    Languages Spoken:
    English

    Umang Singhal is a primary care provider, practicing in Internal Medicine in San Marcos, California. Dr. Singhal is rated as an Experienced provider by MediFind in Colonoscopy. His clinical expertise encompasses Malnutrition, Saddle Pulmonary Embolism, Pulmonary Edema, Colonoscopy, and Bone Marrow Aspiration.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Cleveland Clinic

    400 Craven Rd, 
    San Marcos, CA 
     (1.0 miles away)
    Languages Spoken:
    English

    Sara El Ouali is an Internal Medicine provider practicing medicine in San Marcos, California. Dr. El Ouali is rated as an Experienced provider by MediFind in Colonoscopy. She is also highly rated in 2 other conditions, according to our data. Her clinical expertise encompasses Viral Gastroenteritis, Crohn's Disease, Colitis, Endoscopy, and Colonoscopy.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Neighborhood Healthcare

    2085 Montiel Rd Ste 102, 
    San Marcos, CA 
     (1.9 miles away)
    Languages Spoken:
    English

    Arturo Tolentino is an Internal Medicine provider practicing medicine in San Marcos, California. Dr. Tolentino is rated as an Experienced provider by MediFind in Colonoscopy. His clinical expertise encompasses Vitamin D Deficiency, Liver Failure, Gallbladder Disease, Endoscopy, and Gastrostomy.

    Experienced in Colonoscopy
    Family Medicine
    Experienced in Colonoscopy
    Family Medicine

    Palomar Medical Center Laboratory

    2185 Citracado Pkwy, 
    Escondido, CA 
     (3.0 miles away)
    Languages Spoken:
    English

    Adnan Zahid is a primary care provider, practicing in Family Medicine in Escondido, California. Dr. Zahid is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Gastrointestinal Bleeding, Pneumonia, Sepsis, Endoscopy, and Colonoscopy.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Palomar Medical Center Laboratory

    2185 Citracado Pkwy, 
    Escondido, CA 
     (3.0 miles away)
    Languages Spoken:
    English

    Gurpreet Singh is an Internal Medicine provider practicing medicine in Escondido, California. Dr. Singh is rated as an Experienced provider by MediFind in Colonoscopy. His clinical expertise encompasses Gastrostomy and Hemorrhoidectomy.

    Experienced in Colonoscopy
    Experienced in Colonoscopy

    Office

    2125 Citracado Pkwy Ste 140, 
    Escondido, CA 
     (4.8 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Hardeep Phull is an Oncologist practicing medicine in Escondido, California. Dr. Phull is rated as an Experienced provider by MediFind in Colonoscopy. His clinical expertise encompasses Inflammatory Breast Cancer, Leukocytosis, Anemia, Angiosarcoma, and Colonoscopy. Dr. Phull is currently accepting new patients.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Escondido Office - Second Avenue Internal Medicine

    225 E 2nd Ave Ste 102, 
    Escondido, CA 
     (5.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Emad Bishay is a primary care provider, practicing in Internal Medicine in Escondido, California. Dr. Bishay is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Sepsis, Arthritis, Stroke, Gastrostomy, and Hip Replacement. Dr. Bishay is currently accepting new patients.

    Advanced in Colonoscopy
    Gastroenterology
    Advanced in Colonoscopy
    Gastroenterology

    Genesis Healthcare Partners, PC

    781 Garden View Ct, 
    Encinitas, CA 
     (7.9 miles away)
    Experience:
    22+ years
    Languages Spoken:
    English
    Offers Telehealth

    Steven Di Lauro is a Gastroenterologist practicing medicine in Encinitas, California. He has been practicing medicine for over 22 years. Dr. Di Lauro is rated as an Advanced provider by MediFind in Colonoscopy. He is also highly rated in 38 other conditions, according to our data. His clinical expertise encompasses Gastrointestinal Bleeding, Diverticular Disease, Colitis, Endoscopy, and Colonoscopy. Dr. Di Lauro is board certified in American Board Of Internal Medicine.

    Advanced in Colonoscopy
    Gastroenterology
    Advanced in Colonoscopy
    Gastroenterology

    Office

    Rancho Santa Fe, CA 
     (9.9 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Joseph Weiss is a Gastroenterologist practicing medicine in Rancho Santa Fe, California. Dr. Weiss is rated as an Advanced provider by MediFind in Colonoscopy. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Colorectal Cancer, Colonoscopy, and Endoscopy.

    Experienced in Colonoscopy
    Internal Medicine
    Experienced in Colonoscopy
    Internal Medicine

    Graybill Medical Group Inc.

    225 E 2nd Ave, 
    Escondido, CA 
     (5.3 miles away)
    Languages Spoken:
    English

    Khaldoun Abouelhosn is a primary care provider, practicing in Internal Medicine in Escondido, California. Dr. Abouelhosn is rated as an Experienced provider by MediFind in Colonoscopy. His clinical expertise encompasses Sepsis, Stroke, Volkmann Contracture, Endoscopy, and Hip Replacement.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Office

    935 E Pennsylvania Ave, 
    Escondido, CA 
     (5.7 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Naveen Gara is a Gastroenterologist practicing medicine in Escondido, California. Dr. Gara is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Hepatitis, Portal Hypertension, Nonalcoholic Steatohepatitis (NASH), Endoscopy, and Colonoscopy. Dr. Gara is currently accepting new patients.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Office

    488 E Valley Pkwy Ste 111, 
    Escondido, CA 
     (5.7 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Haritha Chelimilla is a Gastroenterologist practicing medicine in Escondido, California. Dr. Chelimilla is rated as an Experienced provider by MediFind in Colonoscopy. She is also highly rated in 17 other conditions, according to our data. Her clinical expertise encompasses Swallowing Difficulty, Painful Swallowing, Gastroesophageal Reflux Disease (GERD), Gastrostomy, and Gastrectomy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Gastroenterology

    225 E 2nd Ave Ste 102, 
    Escondido, CA 
     (5.7 miles away)
    Languages Spoken:
    English

    Mark Kadden is a Gastroenterologist practicing medicine in Escondido, California. Dr. Kadden is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Viral Gastroenteritis, Colitis, Swallowing Difficulty, Endoscopy, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    North County Gastroenterology Medical Group Inc.

    3923 Waring Rd Ste A, 
    Oceanside, CA 
     (7.8 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Michael Shim is a Gastroenterologist practicing medicine in Oceanside, California. Dr. Shim is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 28 other conditions, according to our data. His clinical expertise encompasses Familial Adenomatous Polyposis, Painful Swallowing, Swallowing Difficulty, Gastrectomy, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    North County Gastroenterology Medical Group Inc.

    3923 Waring Rd Ste A, 
    Oceanside, CA 
     (7.8 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Javaid Shad is a Gastroenterologist practicing medicine in Oceanside, California. Dr. Shad is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 31 other conditions, according to our data. His clinical expertise encompasses Heartburn, Diarrhea, Trichohepatoenteric Syndrome, Gastrectomy, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    North County Gastroenterology Medical Group Inc.

    3923 Waring Rd Ste A, 
    Oceanside, CA 
     (7.8 miles away)
    Languages Spoken:
    English
    Offers Telehealth

    Matthew Viernes is a Gastroenterologist practicing medicine in Oceanside, California. Dr. Viernes is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 23 other conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Familial Adenomatous Polyposis, Swallowing Difficulty, Gastrectomy, and Colonoscopy.

    Experienced in Colonoscopy
    Gastroenterology
    Experienced in Colonoscopy
    Gastroenterology

    Genesis Healthcare Partners, PC

    781 Garden View Ct, 
    Encinitas, CA 
     (7.9 miles away)
    Experience:
    18+ years
    Languages Spoken:
    English
    Offers Telehealth

    Ethan Bortniker is a Gastroenterologist practicing medicine in Encinitas, California. He has been practicing medicine for over 18 years. Dr. Bortniker is rated as an Experienced provider by MediFind in Colonoscopy. He is also highly rated in 16 other conditions, according to our data. His clinical expertise encompasses Heartburn, Hemorrhoids, Familial Adenomatous Polyposis, Endoscopy, and Colonoscopy. Dr. Bortniker is board certified in American Board Of Internal Medicine.

    Showing 1-20 of 61

    Last Updated: 04/28/2026

    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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 San Marcos, 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 

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