All professionals at Southwest Gastroenterology PA maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

  • Tony N. Tsen,

    Board Certified Gastroenterologist and General Internist, Dr. Tony Tsen, has been caring for patients in Seguin and the surrounding communities since 2002. He grew up in Houston, Texas and graduated from the University of Notre Dame. After completing medical school at the University of Texas Health Science Center San Antonio, he then went on to complete his residency at Washington University St. Louis, Barnes-Jewish Hospital before finishing Gastroenterology fellowship at the University of Missouri Kansas City, Truman Medical Center. Dr. Tsen has co-authored several publications and is included in the American Journal of Gastroenterology. He is also very active in the community, serving as a Preceptor for health science students and medical students and volunteering for the University of Incarnate Word School of Osteopathic Medicine. 

    Undergraduate Education: University of Notre Dame, Microbiology, 1986 

    Medical Education: University of Texas Health Science Center San Antonio, 1990 

    Residency: Washington University St Louis - Barnes-Jewish Hospital, 1993 

    Fellowship: University of Missouri Kansas City - Truman Medical Center, 1995 

    Counties Served: Guadalupe, Comal, Karnes, & surrounding area 

    Affiliated Centers: Guadalupe Regional Medical Center , Christus Santa Rosa Ambulator Surgery Center

    Dr. Tsen is passionate about providing premier gastrointestinal patient care to the community and seeks to establish a personal, courteous medical relationship with each and every patient. He diagnoses, treats, and manages an array of gastrointestinal and liver disorders, as well as performs all diagnostic and therapeutic endoscopic procedures including ERCPs. Although highly skilled in all areas of Gastroenterology, his special interests include IBD, GERD, Hepatitis, and cancer screening. 

    Dr. Tsen is married with three adult children who are also in the medical field. He is an avid Aquarist, amateur Ichtyologist and enjoys his family and travel.

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Southwest Gastroenterology PA


9:00 am-5:00 pm


9:00 am-5:00 pm


9:00 am-5:00 pm


9:00 am-5:00 pm


9:00 am-3:00 pm