El Paso Sleep Center Medical Staff


Dr. Gonzalo Diaz opened the first sleep disorders center in El Paso area in 1985. He received his training in sleep disorders medicine at the prestigious Monteflore Hospital at Albert Einstein School of Medicine in New York. He is trained in pulmonary medicine and has subspecialty certification in sleep disorders and pulmonary medicine. He has served as medical director at Sierra Medical Center, Del Sol Medical Center, Providence Memorial Hospital and is currently the medical director at the El Paso Sleep Center.

He is AASM and ABIM-Certified Sleep Specialist and Associate Professor at Texas Tech University Health Science Center Paul L. Foster School of Medicine from the Department of Internal Medicine. He has a private practice focused on pulmonary medicine and sleep medicine. Dr. Diaz has taught fellows, medical students, resident physicians, respiratory/sleep technicians and students since 1985. He has published articles in sleep medicine. He is currently involved in clinical research in sleep disorders. His areas of special interest are obstructive sleep apnea, insomnia in adults and sleep disorders in children.


Dr. Tremper is the owner of Pediatric Pulmonary Services. He graduated from the Philadelphia College of Osteopathic Medicine and served residency at the William Beaumont Army Medical Center Department of Pediatrics, with a Fellowship in Pediatric Pulmonary at the University of California, San Diego.

Dr. Tremper has authored numerous pediatric journal articles. He is a Diplomat on the National Board of Osteopathic Medicine and a Diplomat on the American Board of Pediatrics. Dr Tremper is a Fellow of the American Academy of Pediatrics.


Dr. Briones opened the first sleep disorders center in the El Paso region with Dr. Gonzalo Diaz in 1985. He is Founder of the Department of Psychiatry at Texas Tech University HSC-El Paso, where he served as Regional Chair for more than 25 years. Dr. Briones has authored more than 30 medical literature publications covering a wide range of topics. He continues to be very active in research, including current work in psychotic phenomenology, epidemiology, cross-culture medicine and sleep disorders.

He is Professor and Associate Chair of Psychiatry at the Texas Tech University Paul Foster School of Medicine, where he provides patient care and supervises the training of medical students and residents. He is certified in psychiatry by the American Board of Psychiatry and Neurology. Dr. Briones graduated from the University of Texas Medical Branch and received his specialty training in psychiatry at The University of Texas HSC-San Antonio.

In 2011 Dr. Briones was awarded the Distinguished Service Award at the annual meeting of the Texas Society of Psychiatric Physicians. He has been awarded Distinguished Life Fellow status, the highest achievement of the American Psychiatric Association.


Dr. Arango is a board certified Otolaryngologist and has been practicing in El Paso since 1992. Doctor Arango graduated from the University of Puerto Rico with a Bachelors of Science.

He received his Medical Doctors degree from the University of Puerto Rico School of Medicine; during his education there he was honored with Magna Cum Laude status and recognized as one of the Best Doctors in America. In 1992 he joined El Paso Ear, Nose and Throat Association.

Dr. Arango has research interest in Tumor Biology, Drug Resistant Pathologies and Sleep Medicine. Dr. Arango is currently a visiting Professor at Texas Tech University. He is a member of the El Paso County Medical Society, American Medical Association, Texas Medical Foundation and the El Paso Sleep Center.


Dr. Patrick Gomez is a board certified Otolaryngologist and a long time southwest area resident. Dr. Gomez was born in Alamogordo, New Mexico. He received his Medical Doctors degree from the University of New Mexico School of Medicine.

He completed his internship and surgical residency at Portsmouth Naval Hospital in Portsmouth, Virginia. Dr. Gomez served at Camp Lejeune Naval Hispital, Fleet Hospital 5 in Operation Desert Storm. He completed his service to our country as a Naval Lieutenant Commander in 1991. In 1992 he joined El Paso Ear Nose and Throat Association.

Dr. Gomez has multiple publications with interest in toxic shock syndrome, thyroid dysfunction, and sleep medicine. Dr. Gomez is currently a visiting Professor at Texas Tech University. He is a member of the El Paso Medical Society, American Medical Association, American College of Surgeons, American Academy of Otolaryngology Head & Neck Surgery and the El Paso Sleep Center.


Dr. Filler is Assistant Professor and Director of Oral Maxillofacial Surgery at Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine. A graduate of Texas Tech University and Baylor College of Dentistry, Dr. Filler did his residency training at William Beaumont Army Medical Center.

He then went on to multiple Army hospital assignments, both as a clinician and an educator. He ended his twenty years of service to our country as Chief of Oral Maxillofacial Surgery and officer-in-charge of hospital dentistry at Darnall Army Hospital, Fort Hood, Texas.

In 2009 Dr. Filler joined the surgery faculty at TTUHSC. He was specifically hired to establish an oral maxillofacial surgery service because of his particular interest and expertise in reconstructive maxillofacial surgery. This includes orthognathic surgery to treat obstructive sleep apnea.

Dr. Filler is a Diplomat of the American Board of Oral and Maxillofacial Surgery, a member of the American Association of Oral and Maxillofacial Surgeons, the International Association of Oral and Maxillofacial Surgeons, the El Paso Dental Society, the American Dental Society, and the Southwest Society of Oral and Maxillofacial Surgeons.


Dr. Aghaegbulam Uga is a well-rounded physician who is board certified in Psychiatry and Internal Medicine. He has extensive training in his area of specialty and therefore provides exceptional care in both fields. Dr. Uga started his career in Nigeria where he completed a residency training in General Adult Psychiatry and a fellowship in Consultation-Liaison Psychiatry, prior to coming to the United States. He then completed dual residency training in Internal Medicine and Psychiatry at Southern Illinois University, Springfield Illinois. He relocated to El Paso to join the Texas Tech University Health Sciences Center (TTUHSC), Paul L. Foster School of Medicine as a Faculty in Internal Medicine and Psychiatry Departments. Dr. Uga has a passion for education of the next generation of physicians. With this passion, he founded the Combined Internal Medicine-Psychiatry Residency Training Program at TTUHSC and is currently the Director of the program. Dr. Uga is also interested in research with specific interest in integrated care and the effects of comorbid psychiatric and medical on the individual, and has publications in this field. He is a compassionate physician and approaches his patients with a holistic problem solving technique to provide complete care for the individual.


Dr. Maria Mendoza received her Doctor degree in family nursing practice in 2014 from the University of Texas at El Paso. During her Doctoral education program, Dr. Mendoza implemented a COPD order set based on standardized guidelines with eligible adult patients in an acute care setting in El Paso Texas. The use of the guideline resulted in no readmissions among the participants within 30 days of discharge. Her Capstone Project is titled Impact of a Clinical Order Set on Acute COPD Exacerbations. She presented her Capstone Project findings in the Summer Institute on Evidence-Based Practice in San Antonio Texas, in 2014.

Dr. Mendoza received her Master of Science in Nursing with a Family Nurse Practitioner concentration in 2008 from the University of Texas at El Paso. During her Master’s program, Dr. Mendoza completed over 100 practicum hours in the specialty of pulmonary care under the direct supervision of a pulmonologist at El Paso Pulmonary Association. During this time, Dr. Mendoza became committed to being part of the solution to alleviating the burden of chronic obstructive pulmonary disease. Dr. Mendoza received her Bachelor of Science in Nursing in 2004.

Dr. Mendoza is certified by the American Association of Nurse Practitioners, is a member of the American Academy of Sleep medicine, is a member of the Sigma Theta Tau International Honor Society of Nursing, is a member of the Texas Nurse Practitioners Association, and a member of the El Paso Area Advanced Practice Nurses Association.

Dr. Mendoza has been the recipient of numerous honors and awards, including Chancellors list during 2005-2006. In 2014 she was selected for the Paso del Norte Health Foundation Graduate Fellows Program award for academic excellence and leadership.

As part of the El Paso Sleep Center Medical Team, Dr. Mendoza’s goal is to share the goals of the team, to provide the highest possible quality care to all patients and to share principles and values of team based care approach.

Mr. Gabriel Sanchez, FNP-C

A native El Pasoan attended undergraduate and graduate school locally including earning a Masters of Science degree in Nursing (MSN) at UTEP. Board certified as a Family Nurse Practitioner (FNP) through the American Academy of Nurse Practitioners (AANP).

Clinical work experience includes four plus years in Urgent Care and Occupational Medicine as a FNP.

Joined El Paso Sleep Center in 2015 with the commitment to provide quality clinician services in restoring and promoting people’s health, and encouraging productivity in all areas of their lives.

Joseph Arteaga, RST, RPsg.T., CSE

Joseph graduated from the Stanford School of Sleep Medicine in 1985. He was one of the first 300 technologists in the United States to become a Registered Polysomnographic Technologist (R.Psg.T.). He obtained his Registered Sleep Technologist (RST) credential 2011. In 2014, he acquired the Certified Clinical Sleep Educator (CSE) designation. He has been a member in good standing of the America Association of Sleep Technologist (AAST) since the 1986. Together with Dr. Gonzalo Diaz, M.D. they started the first Sleep Disorders Center in the El Paso area. Joseph has been in the field of sleep medicine for over 30 year, prior to this he worked as a respiratory therapist, pulmonary technologist, EEG technologist and hyperbaric technologist in El Paso area hospitals.


1. Medical Degree University of Illinois
2. Internship Cook County Hospital Rotating Type
3. General Surgery Residency First year Wadsworth VA-UCLA
4. Otolaryngology Residency University Illinois Research and Educational Hospital
5. American Board of Otolaryngology Fellow
6. Texas Medical License Active
7. American Academy Of Ophthalmology and Otolaryngology Fellow
8. American College of Surgeons Fellow
9. American Academy of Facial Plastic & Reconstructive Surgery Fellow
1O. Texas Tech School of Medicine Clinical Assistant Professor
ll. American Academy Otolaryngology Allergy
12. United States Air Force July 1966-July 1968, Honorable Discharge
13. Chief of Staff, Providence Memorial Hospital
14. Board of Governors Providence Memorial Hospital
15. President El Paso County Medical Society
16. Governor of the American Academy Otolaryngology
17. Hospital Staffs Courtesy Staff at Present, Active before
Providence Memorial
Sierra Medical
Las Palmas
Del Sol

Technical Staff

Patient Services