Chief Medical Officer

Dr. Billings serves as Associate Professor of Family and Community Medicine at Texas Tech University School of Medicine.  Medical students and family medicine residents routinely rotate with Dr. Billings, and he has been recognized with teaching awards from both Texas Tech University Health Sciences Center-Permian Basin and the University of Texas Medical Branch.  In 2015, the Texas Academy of Family Physicians honored Dr. Billings with the 2015 Exemplary Teaching Award for his work with precepting medical students.  In 2015, Dr. Billings also became director of the Texas Statewide Family Medicine Preceptorship Program. 
Dr. Billings currently serves as chief of staff of Big Bend Regional Medical Center, a critical access hospital, in Alpine, Texas.  Additionally, Dr. Billings serves as Co-President of the Presidio-Ojinaga Binational Health Council and as Medical Director for the City of Presidio Emergency Medical Services.



Dr. Katie Ray currently practices Family Medicine and Obstetrics in Marfa, Alpine and Presidio. In addition to a busy clinic practice, she delivers babies and cares for patients in the hospital. She has a special interest in women's health services, sports medicine and skin procedures. She heads a grant-funded program to provide free long-acting reversible contraception (IUDs and implants) to patients and training for residents about these devices. Additionally, she serves as Clinical Assistant Professor for medical students and residents with UTMB and Tech Tech Medical Schools.

Dr. Taylor McCain currently practices family medicine and obstetrics. She enjoys caring for patients of all ages in the Alpine, Presidio and Marfa clinics as well as Big Bend Regional Medical Center. She has a special interest in women's health. She graduated from Texas College of Osteopathic Medicine in Fort Worth, TX in 2015 and enjoys incorporating osteopathic manipulative medicine skills into her treatment plans. She then completed family medicine residency at McLennan County Medical Education and Research Foundation in Waco, TX. 


Provider FNP-C

Maritza Armendariz, is a Board Certified Family Nurse Practitioner, daughter of Frank Armendariz and the late Martha Rohana Armendariz. She is a 1984 graduate of Presidio High School returning to her hometown to begin working with the Presidio County Health Service.

“I’m excited to be back home and hope to be involved in our community.  I am passionate about helping others and it’s my personal goal to provide the best care possible and to help out in any way I can” Maritza said.


Provider FNP-C

"I am grateful to have had so many wonderful experiences as a registered nurse. In addition to working in the United States, I go to Guatemala almost every year to do medical mission work there. It was this type of work that led me to pursue becoming a Nurse Practitioner. I have served as a Nurse Practitioner since 2011 working in Family Medicine and also Emergency Medicine. Currently, I live and work in Presidio and am enjoying getting to know the wonderful people there!"

Jacqueline Bow, LPC

Family Health Services of Alpine

Eleazar Cano, LPC

Presidio County Medical Clinic

Rogelio Zubia, LPC

Presidio County Medical Clinic

Behavioral Health Counselors

Alpine Dental

Iris Korus, DDS


Tracy Cash

Dental Hygienist

Adriana Holguin

Dental Assistant