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John T. Dugan, III, M.D.

Book an appointment online by clicking the “Book Online” button or call Dr. Dugan’s secretary at (713) 807-4576.

SpecialtyGastroenterology
DegreesM.D.
Areas of Expertise

  • Screening for Colon Cancer and Colon Polyps (including colonoscopy)

  • Therapeutic and Diagnostic Endoscopy

  • Radiofrequency Ablation (RFA) for Barrett’s Esophagus

  • Heartburn, Acid Reflux, and Peptic Ulcer Disease (including Upper Endoscopy)

  • Evaluation of Anemia and Gastrointestinal Bleeding

  • Inflammatory Bowel Disease (Crohn’s Disease and Ulcerative Colitis)

  • Celiac Disease

  • Irritable Bowel Disease

  • Diverticulosis and Diverticulitis

  • Evaluation of Abnormal Liver Functions Tests

  • Evaluation of Chronic Abdominal Pain, Nausea, and Vomiting

Board Certification
  • American Board of Internal Medicine, 2014

  • American Board of Internal Medicine – Gastroenterology, 2016
  • Hospital Affiliation
  • Houston Methodist Hospital

  • Memorial Hermann Hospital – Texas Medical Center
  • Office4th Floor
    Phone(713) 807-4576
    FAX(713) 807-4972

    Dr. Dugan received his medical degree from the University of Texas Medical School at Houston in 2010. After obtaining his medical degree, Dr. Dugan continued his education at the University of Texas Medical School at Houston where he completed his Internship and Residency in Internal Medicine. Dr. Dugan was honored to receive the Cheves and Isabella Smythe Excellence Award, given to the resident that exemplifies the qualities of “Selfless, Mentor, Young at heart, Thinker, Healer and Excellence”. In addition, he received the Monica Monet Holloway Barrett, MD Award, given to the graduating internal medicine resident who exemplifies the professional qualities of integrity, excellence in patient care, leadership in community service and kindness of spirit. Prior to medical school he worked as an engineer after obtaining a Bachelor of Science degree in Mechanical Engineering from Texas A&M University at College Station in 2002.

    At the University of Texas Medical School at Houston he went on to complete a gastroenterology fellowship and worked in three institutions: MD Anderson Cancer Center, Memorial Hermann Hospital Texas Medical Center, and Lyndon Baines Johnson County Hospital. Each facility provided a unique learning environment and diverse patient encounters, which have enabled him to develop broad clinical skills. During his final year of fellowship, Dr. Dugan was honored to serve as chief gastroenterology fellow before joining Medical Clinic of Houston, L.L.P. in August 2016. Dr. Dugan is board certified in both Internal Medicine and in Gastroenterology.

    Medical Education

    The University of Texas Houston Medical School - HoustonChief Gastroenterology Fellow

    The University of Texas Houston Medical School - HoustonFellowship in Gastroenterology, Hepatology and Nutrition

    The University of Texas Houston Medical School - HoustonResidency in Internal Medicine

    The University of Texas Houston Medical School - HoustonM.D.

    Texas A&M University - College StationB.S. - Mechanical Engineering

    Recognition and Awards

    • HealthGrades Recognized Doctor Honor Roll (2016-2018)

    • Texas Monthly’s SUPER DOCTORS® Rising Stars (2018-2020)

    • Cheves and Isabella Smythe Excellence Award: for resident that exemplifies the qualities of “Selfless, Mentor, Young at heart, Thinker, Healer and Excellence”

    • Monica Monet Holloway Barrett, MD Award: for graduating internal medicine resident who exemplifies the professional qualities of integrity, excellence in patient care, leadership in community service and kindness of spirit

    Patient Reviews