Chair of Surgery
Trauma Medical Director
General Surgery, Trauma/Surgical Critical Care
Alan H. Tyroch, M.D., FACS, FCCM, is a fifth-generation native Texan. He is professor and founding chair of the Paul L. Foster School of Medicine’s Department of Surgery. Dr. Tyroch is also chief of surgery, trauma medical director and the incoming chief of staff at University Medical Center of El Paso.
After obtaining his Bachelor of Science in Microbiology from Texas A&M University, Dr. Tyroch earned his Doctorate of Medicine at the University of Texas Health Science Center at Houston McGovern Medical School in Houston, Texas. He is a graduate of the Phoenix Integrated Surgical Residency Program in Phoenix, Arizona. He has also furthered his surgical education with a fellowship in trauma and surgical critical care at the University of California, San Francisco Fresno Medical Education Program in Fresno, California.
Dr. Tyroch is board certified in general surgery and surgical critical care. He is a member in the American College of Surgeons, American Association for the Surgery of Trauma, Society of Critical Care Medicine, Texas Surgical Society, Southwestern Surgical Congress, American Trauma Society, Pan-American Trauma Society, Pediatric Trauma Society, Western Surgical Association, Association for Academic Surgery, Association for Surgical Education, Society of Surgical Chairs, ACS-South Texas Chapter, Texas Medical Association and El Paso County Medical Society.
Dr. Tyroch is also a fellow of the American College of Surgeons and the American College of Critical Care Medicine. Dr. Tyroch is an appointee on the governor’s Emergency Medical Services and Trauma Advisory Council. He is an active member in the BorderRAC, the Far West Texas and Southern New Mexico Regional Advisory Council on Trauma and Emergency Healthcare. His clinical and research interests are trauma, surgical critical care and general surgery.
Residency Program Director
Brian Richard Davis, M.D., is the general surgery residency program director and director
of surgical research at Texas Tech University Health Sciences Center El Paso. He is
an associate professor in the Department of Surgery and Internal Medicine and is board
certified in general surgery.
Dr. Davis obtained his Doctorate of Medicine in 1999 from Baylor College of Medicine in Houston, Texas. He completed general surgery residency and a fellowship at the University of Louisville in 2005. His specialty interests include hepatobiliary and pancreatic surgery. He also is an expert in laparoscopic and robotic surgery with a special emphasis in foregut surgery, including treatment of hiatal hernia and gastro-esophageal reflux disease. His innovations include endoscopic treatments for biliary disease (ERCP) and surgical treatments for gastroparesis.
Dr. Davis is a career surgical educator who has designed competency-based training curricula for surgical residents and is a founding faculty member for the gastroenterology fellowship. He is an elected member of the Texas Surgical Society, the Society for Surgery of the Alimentary Tract, the Society of American Gastrointestinal Endoscopic Surgeons, and the American Society of Gastrointestinal Endoscopy. Research interests include surgical education, robotic surgery, endoscopic surgery and the microbiome of inflammatory bowel disease.
Breast Surgical Oncology
Medical Director, Texas Tech Physicians of El Paso Breast Care Center
Associate Student Clerkship Director
Karinn M. Chambers, M.D., FACS, is an assistant professor for the department of surgery at Texas Tech University Health Sciences Center El Paso dedicated to the surgical treatment of breast related concerns, benign and malignant. Dr. Chambers is board certified in general surgery and a fellowship trained breast surgical oncologist.
Dr. Chambers is a graduate of St. George University Medical School Grenada, West Indies, where she received her Doctorate of Medicine in 2005. She completed her general surgery residency at Albany Medical Center, Albany, New York in 2011. In 2012, Dr. Chambers completed a breast surgical oncology fellowship at Levine Cancer Institute, Charlotte, North Carolina.
Surgical Critical Care Director
General Surgery, Trauma/Surgical Critical Care
Dr. McLean joined the department of surgery, TTUHSC El Paso faculty in 1998. She is a graduate of the Medical College of Virginia. She took her surgery internship and general surgery residency at Brown University and graduated in 1994. She went on to a surgical critical care fellowship at the University of Massachusetts Medical Center and completed all requirements in 1995. She stayed on as an instructor in surgery for one year; then to the Mayo Medical School and Clinic Foundation in Minnesota until 1998. She is board certified in both general surgery and surgical critical care.
Alonso Andrade, M.D., is a Assistant Professor for the department of surgery at Texas Tech University Health Sciences Center El Paso. Dr. Andrade is board certified in general surgery.
Dr. Andrade is a graduate of Baylor College of Medicine in Houston, Texas where he received his M.D. in 2010. He completed his general surgery residency at Texas Tech University Health Sciences Center El Paso Department of Surgery in 2015.
Chief, Colon and Rectal Surgery
Ziad N. Kronfol, M.D., is an assistant professor for the department of surgery at Texas Tech University Health Sciences Center El Paso and chief of colon and rectal surgery. Dr. Kronfol is board certified in general surgery and board eligible in colon and rectal surgery.
Dr. Kronfol is a graduate of American University of Beirut Medical Center, Beirut, Lebanon where he received his Doctorate of Medicine in 2006. He completed his general surgery residency at Texas Tech University Health Sciences Center El Paso Department of Surgery in 2014. In 2015, Dr. Kronfol completed a colon and rectal surgery fellowship at Mount Sinai-St. Luke’s Roosevelt, New York.
Nathaniel Ng, M.D., graduated from medical school at The University of Texas Medical Branch at Galveston in 2010. He completed his residency in general surgery at Texas Tech University Health Sciences Center El Paso in 2016. Following residency, Dr. Ng completed his fellowship at The University of Texas Health Science Center at Houston McGovern School of Medicine, specializing in colon and rectal surgery. Dr. Ng is a native of El Paso and has returned to serve the region after completing his surgical training.
Plastic and Craniofacial Surgery
Jose A. Castro Garcia, M.D., is a plastic and craniofacial surgeon. He is a clinical instructor for the Department of Surgery at Texas Tech University Health Sciences Center El Paso.
Dr. Castro Garcia is a graduate of Autonomous University of San Luis Potosi, San Luis Potosi, Mexico where he received his Doctorate of Medicine in 2004. He completed his general surgery residency at Texas Tech University Health Sciences Center El Paso Department of Surgery in 2012.
In 2015, Dr. Castro Garcia completed a plastic surgery fellowship at the Mayo Clinic, Rochester, Minnesota. He continued his training at the Craniofacial Center in Dallas, Texas, completing a craniofacial surgery fellowship in 2016.
Associate Residency Program Director General Surgery, Pediatric Surgery
Jarett K . Howe, M.D., is an assistant professor for the department of surgery at Texas Tech University Health Sciences Center El Paso. Dr. Howe is board certified in general surgery, surgical critical care, and pediatric surgery.
Dr. Howe is a graduate of the University of South Dakota School of Medicine, Sioux Falls, South Dakota where he received his Doctorate of Medicine in 2006. He completed his general surgery residency at Texas Tech University Health Sciences Center El Paso Department of Surgery.
In 2012, Dr. Howe completed a surgical critical care fellowship at St. Louis University. He then completed a pediatric trauma/research fellowship in 2013 and a pediatric surgery fellowship in 2015 at St. Louis University, Cardinal Glennon Children’s Medical Center in St. Louis, Missouri.
Oral Maxillofacial Surgery
Trent Filler, D.D.S., grew up in Fort Worth, Texas. He attended Texas Tech University in Lubbock, where he earned a B.S. in wildlife science. He then obtained his Doctorate of Dental Surgery (D.D.S.) from the Baylor College of Dentistry, and entered the United States Army Dental Corp. While in the Army Dental Corp, Dr. Filler completed a residency in oral maxillofacial surgery (OMFS) at William Beaumont Army Medical Center in El Paso.
During his military career, Dr. Filler served in Germany twice. He was chief of OMFS in several hospitals and was an oral surgery mentor in the Army Dental Corp’s Advanced Education in General Dentistry Residency program. He retired in 2004 as a colonel, and went into private practice in Belton, Texas. He joined TTUHSC El Paso as director of OMFS in 2009. His primary areas of interest are maxillofacial trauma and post-traumatic reconstruction.
Dr. Filler is a diplomat of the American Board of Oral Maxillofacial Surgeons; a fellow of the American College of Oral Maxillofacial Surgeons and the American Dental Society of Anesthesiology; and a member of the International Association of Oral Maxillofacial Surgeons, the American Dental Association, the Texas Association of Oral Maxillofacial Surgery, and the El Paso Dental Society.
Ryan Freemyer, M.D., is an assistant professor at TTUHSC El Paso Department of Surgery. Dr. Freemyer is board certified in general surgery.
Dr. Freemyer graduated from Texas Tech University Health Sciences Center School of Medicine, Lubbock, Texas in 2001 where he received his Doctorate of Medicine. He completed his residency training in general surgery at TTUHSC El Paso in 2006.
Ear, Nose, and Throat
Miller F. Rhodes, M.D., is an otolaryngologist and assistant professor at Texas Tech University Health Sciences Center El Paso, Texas. He is certified by the American Board of Otolaryngology-Head and Neck Surgery. He is active in teaching residents and medical students. His special interest is chronic ear disease.
Dr. Rhodes is a graduate of Meharry Medical College where he received his M.D. with honors. He is a graduate of the Fitzsimmons Army Medical Center in ENT residency where he also did his internship.
He is a retired military colonel who served in Korea. He received the Legion of Merit, and is a member of the South Carolina State University ROTC Hall of Fame.
Patricia Nelson, M.D., is a board-certified, comprehensive ophthalmologist with an affinity for cataract, refractive, and oculoplastic surgeries. Dr. Nelson received a B.A. in Chemistry and Biochemistry from Oberlin College. She was awarded a United States Army Health Professionals Scholarship and earned her M.D. from Pennsylvania State University College of Medicine in Hershey, Pennsylvania. Dr. Nelson completed her transitional internship at William Beaumont Army Medical Center in El Paso, Texas where she was Intern of the Year. She continued her ophthalmology residency training in San Antonio, Texas and received second place from the Texas Ophthalmology Association for a resident research presentation. Following residency, Dr. Nelson served for four years as an ophthalmologist at Martin Army Community Hospital in Fort Benning, Georgia. During this time, Dr. Nelson was promoted to the rank of Major, named Chief of Ophthalmology, served with the American Board of Ophthalmology to set exam standards, and helped initiate a partnership with the Alabama Department of Veteran’s Affairs. Most recently, Dr. Nelson was inducted as a fellow of the American College of Surgeons and awarded the Army Meritorious Service Medal following eight years of exemplary active duty military service.
Dr. Erica Renee Alvarez graduated from Paul L. Foster School of Medicine Texas Tech
University Health Sciences Center here in El Paso, Texas. She completed her internship
in Internal Medicine at the University of Chicago, ophthalmology residency at Howard
University Hospital in Washington, D.C, and her fellowship training at The Ohio State
University. Dr. Alvarez is an El Paso native, bilingual in Spanish, and accepting
new patients now.
Dr. Alvarez offers her expertise in treating cancers of the eye including primary vitreoretinal lymphoma, uveal melanoma, conjunctival melanoma, leukemic retinopathy, ocular side effects of cancer treatments as well as metastatic diseases to the eye. She is trained in the latest techniques for treatment including: intraoperative and in-office intravitreal chemotherapy injections. She is proficient in the placement of brachy radiation therapy plaques and transpupillary thermotherapy for treatment of uveal melanoma. She offers fine needle aspiration biopsies, and transcleral biopsies for identification of tumor genetic markers and overall prognostication. For larger tumors, she is competent in surgical removal via enucleation. She has worked with radiation oncology and is competent in following patients as they receive external beam radiation for treatment of metastatic lesions, as well as cancers like Diffuse B-cell lymphoma.
Dr. Maldonado is a native El Pasoan and long-standing faculty at the Texas Tech Ophthalmology Clinic. He is board certified by the American Board of Optometry in Ocular Disease and licensed in Texas and New Mexico.
He trains residents and medical students throughout the year on ocular disease and pathology of vision. He is current president of the El Paso Optometric Society and serves on the Board of Directors for the El Paso Diabetes Association. Professionally, he lectures on various eye disease topics throughout Texas for several organizations.
- American Board of Optometry #4236
- American Academy of Optometry
- American Optometric Association
- Texas Optometric Association, Board of Trustees
- El Paso Optometric Society, President 2007-2017
- El Paso Diabetes Board of Directors, since 2011
- National Eye Institute NEHEP Planning Committee Member, since 2012
- Faculty Council Committee Member, Texas Tech University
- Adjunct Clinician, IAUPR Optometry School
Dr. Nelson was awarded a United States Army Health Professionals Scholarship and earned his M.D. from the Creighton University School of Medicine in Omaha, NE. He completed his internship and residency at William Beaumont Army Medical Center through Texas Tech University Health Sciences Center El Paso's Orthopaedic Surgery and Rehabilitation program. Following residency, he served three years at Martin Army Community Hospital and deployed to Afghanistan. He finished his time with the Army at William Beaumont Army Medical Center, training residents. He was also awarded the Army Meritorious Service Medal for his nine years of exemplary active duty military service. Dr. Nelson employs cutting-edge technology to compassionately treat many orthopedic conditions and is excited to share his experience with the TTUHSC El Paso and El Paso community.