CHRISTUS St. Mary’s Clinic Providers

Sister Rosanne Popp, M.D., CHRISTUS St. Mary’s Clinic Medical Director

The driving force at CHRISTUS St. Mary’s Clinic, Sister Rosanne Popp, M.D., is a member of the Congregation of the Sisters of Charity of the Incarnate Word (CCVI), the religious congregation that authored the mission of CHRISTUS Health.

Over the last three decades, Sister Rosanne has accumulated missionary experience in the United States and abroad, along with enough degrees and awards to fill an office wall, which they do. Sister Rosanne received her Bachelor of Science degree in nursing at Incarnate Word College and followed with a Master of Science degree from the Medical College of Virginia.

Sister Rosanne also received her Doctor of Medicine degree from the University of Texas Health Science Center and posted the highest score of any Texas doctor on the United States Medical License Examination.

“My work really fits who I am,” says Sister Rosanne, “Just as I was drawn to the incarnational spirituality of our congregation, I am nurtured by the earthiness of my daily work in the clinic. As I see it, this is where the rubber meets the road.”


Sister KimSister Kim Xuan Nguyen, D.C., CHRISTUS St. Mary’s Chiropractor 

Sister Kim is a member of the Sister of Charity of the Incarnate Word of Houston (CCVI). Born in Vietnam and raised in America.

Sr. Kim received her Bachelor of Science Degree at Loyola University of New Orleans and graduated at Parker College of Chiropractic in Dallas, Texas. Though Sr. Kim Xuan is a petite person, she has strong healing hands and is dedicated to use her gifts to helping those who are in pain.

Before joining religious life and being part of the CHRISTUS Family, Sr. Kim owned her own Chiropractic office for 13 years in Garland, TX. As a Sister and Chiropractor, she has dedicated herself to bringing the wellness and healing presence of Christ to others.


Teresa Rivera, CHRISTUS St. Mary’s Nutrition Health Educator 

Teresa received a degree in Health and Human Performance from the University of Houston. Upon graduation, she began working as a high school teacher but found she had a passion for nutrition and dietetics and pursued an additional degree in Nutrition from University of Houston. Teresa completed her dietetic internship in 2015 from Dominican University in Chicago, IL.

Since then, Teresa has worked closely with the Houston community to fight the obesity epidemic and educate the under-served population. Teresa’s past experience includes The Houston Food Bank, Women Infants and Children’s supplement program (WIC), and Children’s Nutrition education programs.

Teresa is based at St. Mary’s clinic and  also works with CHRISTUS Point of Light, CHRISTUS Healthy Living Mobile Clinics, and CHRISTUS School Clinics. Teresa works with patients to educate them on how to manage illnesses such as Diabetes, Cholesterol, Hypertension, Obesity and many other nutrition related illness through lifestyle change.

Teresa’s Hobbies include; working out, dancing, hanging out with her Pomeranian and cooking healthy meals.

“My favorite part about my job is seeing my patient’s health improve and being able to work with the different CHRISTUS Health GCTX departments.  This allows me to reach more people in the Houston area in greater levels. There is never a dull moment especially since I work with such a great group of people.”