Dr. Mathis is an Assistant Professor, Family Medicine in the UTMB Health Department of Family Medicine.

Dr. Mathis earned a Bachelor of Arts from Baylor University in Waco, Texas, and a Doctor of Medicine from the University of Texas Medical Branch at Galveston, Texas. He completed training with the Memorial Family Medicine Residency Program in Sugarland, Texas.

Dr. Mathis is certified by the American Board of Family Medicine. He also completed a fellowship with the UTMB Health Integrative and Behavioral Medicine Fellowship program and completed his advanced certification in clinical acupuncture.

Dr. McKee joined UTMB's Department of Family Medicine in 2003. She completed both medical school and her residency at UTMB. Dr. McKee is board certified in Family Medicine by the American Board of Family Medicine and in Holistic Medicine by the American Board of Holistic Medicine. She is also a member of the American College of Lifestyle Medicine. Dr. McKee's interests are in complementary and integrative medicine, medical student education, resident training, women's and children's health and maternity care.

 Provider is LGBTQIA+ Responsive

Dr. Porterfield has lived all over the world, from Latin America to parts of Asia. Her areas of clinical and research interest include health equity, population health, clinical vaccinology, diabetes, international/immigrant health, women's health, and graduate medical education. Dr. Porterfield chose family medicine because she enjoys the challenge of caring for people across the full spectrum of life-stages and because she believes in the importance of caring—not just for individual patients—but also whole families and communities.

Dr. Porterfield is an Associate Professor in the Department of Family Medicine, an investigator for the Sealy Institute for Vaccine Sciences, and the Vice Chair of Clinical Operations in Family Medicine.

Dr. Porterfield joined the Department of Family Medicine in 2014 after completing her residency with the UTMB Health Family Medicine Residency Program with a concentration in behavioral medicine. She earned a Bachelor of Arts in Literature from Wheaton College, a Doctor of Medicine from Baylor College of Medicine, and a Master of Public Health from University of North Texas Health Science Center.

Dr. Angela Raimer joined UTMB Health in July 2013. She received her Bachelor of Science Degree in Biology from the Honors College at Baylor University in Waco, Texas and received her Doctorate of Medicine from St. George's University School of Medicine. Dr. Raimer completed her residency training at Baylor College of Medicine San Jacinto Family Medicine Program. She is currently board certified in Family Medicine.

Dr. Raimer’s interests include prevention and chronic health maintenance. Dr. Raimer grew up in the Clear Lake area and is happy to practice in an area she considers home. She currently lives on Galveston Island with her husband and three children.

Dr. Risinger has been practicing medicine for more than 30 years and is Board Certified in Pediatrics and a member of the American Academy of Pediatrics. She grew up in Texas City, Texas and attended Texas City High School. She went to college at Sam Houston State University in Huntsville, Texas and graduated Cumma Sum Laude with a Bachelor of Science majoring in Biology and a minor in Chemistry. Dr. Risinger graduated with a Medical Degree from UTMB and did residency at UTMB as well. While in residency, she was able to go to Kenya for a mission trip and developed a life-long love of travel and service to others through the practice of medicine. After completing residency, she joined the practice of Drs. Raimer, Judice and Noble in 1986. She also has worked in beautiful East Texas in a practice with underserved patients.

She has won teaching awards as well as patient care awards and has been listed in Super Doctors®. She was able to work on a 3 year project while at UTMB with the country of Armenia to develop primary care services. She has done other mission trips to the Russia, Nicaragua, Congo and Ukraine.

In her spare time, she loves to go to Disneyworld with her son and family. She also enjoys cooking, gardening and taking her dog Max on long walks. She was in the church choir and was able to go to Italy with the choir on a mission trip.

Her goal in life is to honor her Lord and Savior Jesus Christ in all that she does. She loves her family and friends and cherishes any time that she can spend with them.

As the years go by she enjoys the practice of pediatrics more and more each day. She likes general pediatrics but has a special interest in preventative health care, ADHD and behavioral health, infectious disease, special needs children and promoting literacy. Dr. Risinger loves pediatrics and considers it is a privilege and honor to care for your children.

Dr. Patricia Ann Rogers is a Professor of Pediatrics at UTMB. She joined UTMB Department of Pediatrics in 2004 and has been faculty at UTMB since 1998. Dr. Rogers is board certified by the American Board of Pediatrics. She received her doctorate from the University of Tennessee Center for Health Sciences (School of Medicine) in Memphis, TN. Dr.Rogers completed her pediatric residency at UTMB in Galveston, TX.

Dr. Rogers has a special interest in teaching medical students and residents. She has received numerous teaching awards including two awards for Excellence in Clinical teaching by the John P. McGovern Academy of Oslerian Medicine.  In addition to holding the tittle of Distinguished Teaching Professor, member of the University of Texas Academy of Health and Science education, Dr. Rogers serves as the director of the School Health Program at UTMB.

Christi Lynn Wargo, CPNP-PC, is a board certified and Texas state licensed pediatric nurse practitioner. She provides care for pediatric patients in the department of Dermatology and General Academic Pediatrics at the Bay Colony and Galveston clinics. Christi graduated with her Associates in Nursing in 2001 from College of the Mainland and from there went on to the University of Texas Medical Branch, where she received her Bachelor's in Nursing in 2003 and then her Master's in Nursing for Pediatric Nurse Practitioner in 2008. She is currently enrolled once again in UTMB's School of Nursing for her Doctorate in Nursing Practice with plans to graduate in the Spring of 2022.

Prior to joining the dermatology department in October of 2016, Christi worked as a pediatric nurse practitioner for the Texas Children's Mobile Clinic, the FQHC Bell's Hill Community clinic in Waco, and she started the school-based Kruse clinic at Memorial Hermann Health Centers for Schools in Pasadena. In 2017, Christi started in the department of General Academic Pediatrics Bay Colony location on Wednesdays seeing primary care patients. She also occasionally provides care at the UTMB Pediatric After-Hours Urgent care clinic in League City. Christi has a great love of community and spends much of her free time volunteering both in Texas as well as abroad.

She is also currently serving on the board of the Houston Area Chapter of the National Association of Pediatric Nurse Practitioners as the Community Co-Chair and is Secretary for the Global Health Special Interest Group and member of the Pediatric Dermatology Special Interest Group. She is also a member of UTMB's Advanced Practice Providers Council. Christi is fluent in English and Spanish.

Dr. Xie joined the UTMB Health Department of Family Medicine in 2021. Dr. Xie earned her Bachelor of Science at the University of Texas at Dallas and her Doctorate of Osteopathic Medicine from the University of North Texas Health Science Center in Fort Worth, Texas. Dr. Xie completed her residency training from Baylor College of Medicine in Houston Texas and also served on the Texas Association of Family Physician's (TAFP) Resident Council. She is a board certified family physician and will be seeing patients at the Family Medicine Clinic - Island West.

Dr. Xie's clinical interests include patient mental wellbeing and also women's health. Dr. Xie is a member of Doctors for Change serving on the Mental Health Committee and the Anti-Human Trafficking Committee.