Dr. Theodore Sy, MD

New Patients

Dr. Theodore Sy, MD


Gastroenterology | Male

MemorialCare Medical Group 15 Mareblu Ste 100, Aliso Viejo, CA 92656 Get Directions
(949) 448-0656

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Personal Bio

Dr. Sy was glad to return home to Orange County for his internship and residency program at UCI Medical Center....Read more

Dr. Sy's Experience

Experience Match

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Board Certifications

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Conditions Treated

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Procedures Performed

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Background Check

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Awards & Recognition

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Languages Spoken

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Memberships & Professional Affiliations

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Visiting Dr. Sy

Dr. Sy accepts 13 insurance carriers

Dr. Sy's Reviews

Likelihood of recommending Dr. Sy to family and friends
based on 9 total surveys (2 with reviews)
Dr. Sy's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    10 to 15 minutes
Patient Reviews (2)
Aliso Viejo, CA |
Dr Sy and his staff are easy to reach , and will answer questions via the messaging system. He has successfully completed 3 colonoscopies where the previous Dr had to stop. Dr Sy and his staff were able to make an urgent scheduling request happen. I'm so thankful to have them as part of my health team!
in Rancho Santa Margarita, CA |
Dr. Sy is very professional and organized. My condition was Hep C type 3 which he recommended the new medication that was to be released in 1 month. He followed up and ordered the medication AND jumped through the hoop to get it covered with the insurance. HIGHLY RECOMMENDED! Above and beyond professionalism and personality!
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Dr. Sy says...

Dr. Sy was glad to return home to Orange County for his internship and residency program at UCI Medical Center. During his residency, he was a Chief Resident in internal medicine overseeing newer residents' training. Additionally, Dr. Sy also completed a three year post graduate fellowship in Gastroenterology at Kaiser Hospital in Los Angeles.

Originally, Dr. Sy thought he would follow his "family of scientists" into a laboratory research field, but after working in a lab for a while, he found that clinical work involving patient contact better suited him.

Dr. Sy's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Gastroenterology
  •  Board certified in Gastroenterology and Internal Medicine
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Sy has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for California.

    What is medical malpractice
  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions

Board Certifications

Why It Matters: Dr. Sy's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Gastroenterology
  • Internal Medicine

Conditions Treated

  • Cancer
  • Constipation
  • Esophageal Cancer
  • Esophageal Diseases
  • Gas-Bloat Syndrome
  • Hernia
  • Inflammatory Bowel Disease
  • Liver Damage from Alcohol
  • Ulcer
  • Ulcerative Colitis


  • Medical School
    Northwestern Center Feinberg School Of Medicine

    Graduated in 2003

  • Residency Hospital
    University Of California Irvine Medical Center

    Completed in 2006

  • Fellowship Hospital
    Kaiser Permanente Hospital Los Angeles

    Completed in 2007

Languages Spoken

  • English

Memberships &
Professional Affiliations

Dr. Sy does not have any memberships or affiliations listed. If you are Dr. Sy and would like to add memberships or affiliations, please update your free profile.


  • Gastroenterology

Procedures Performed

Dr. Sy does not have any procedures listed. If you are Dr. Sy and would like to add procedures you perform, please update your free profile.