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Faculty Profiles


Todd Bell M.D.
Todd E. Bell, MD

Dr. Bell received undergraduate degrees from Oklahoma State University and an MD degree from the University of Arkansas School of Medicine. Dr Bell completed his combined residency training in internal medicine and pediatrics at Duke University Medicinal Center where he served as chief resident. Dr. Bell was recognized with the 2004 Golden Apple Teaching Award for the best resident teacher at Duke University Medical Center. At the University of Arkansas he was awarded the Tom Dugan Award for Outstanding Senior in Pediatrics. He joined the faculty at Texas tech in 2006.

Dr. Bell is a member of the American Academy of Pediatrics, the American College of Physicians, the Society of Hospital Medicine, the Infectious Disease Society of America and the International Society for Influenza and Respiratory Viruses. In addition to his research and teaching efforts, Dr. Bell serves as Local Health Authority for the Amarillo Bi-City-County Health District. Dr. Bell's research interests include MRSA epidemiology, influenza, community health, inpatient care and resident and medical student education. He is board certified in internal medicine and pediatrics. Download Dr. Bell's mini-CV.




Steven Berk, M.D.
Steven L. Berk, MD

Dr. Berk is currently Vice President for Medical Affairs of the Texas Tech University Health Sciences and Dean of the Texas Tech University School of Medical. He has also served as Interim Vice President for the F. Marie Hall Institute for Rural and Community Health. Dr. Berk obtained his undergraduate and MD degree from Boston University, where he stayed for residency and an infectious disease fellowship. Before joining Texas Tech, he served as Chief of Infectious Disease and then Chair of Internal Medicine at the East Tennessee State University James H. Quillen College of Medicine. While there, Dr. Berk received numerous teaching awards for medical students and residents. He joined Texas Tech in 1999, first as Regional Dean of the Amarillo campus. In 2006, he became Dean of the School of Medicine.

Dr. Berk's research interests are in gram negative meningitis, parasitic diseases, and infectious diseases in the elderly. He has authored over 150 publications. He is board certified in internal medicine, infectious diseases and geriatrics.




Thomas Hale, Ph.D.
Thomas W. Hale, PhD

Dr. Hale obtained a BS in Pharmacy from Southwestern Oklahoma State University and a  Ph.D. in Pharmacology and Toxicology from the University of Kansas. He is currently a Professor with the Department of Pediatrics and Assistant Research Dean for the Texas Tech University Health Sciences Center in Amarillo.

Dr. Hale is an experienced clinical pharmacologist with many years of lecturing in all areas of pharmacology and therapeutics. His research interests include the use of medications in breastfeeding women, an area where is he is considered an international expert. He has authored four textbooks on this subject.




Panupong Larppanichpoonphol, M.D.
Panupong Larppanichpoonphol, MD

Dr. Larppanichpoonphol graduated for the Mahidol University in Bangkok, Thailand. He did a residency in Internal Medicine at Northeastern Ohio University and an Infectious Disease and HIV Research Fellowship at the University of Rochester. He also has a Masters in Business Administration for the University of Rochester. He joined the faculty at Texas Tech in 2008.

Dr. Larppanichpoonphol's research interests are in viral mutations and drug resistance in HIV disease. His is a member of the Society for Healthcare Epidemiology of America and the Infectious Diseases Society of America He is Board certified in internal medicine and infectious diseases. Download Dr. Larppanichpoonphol's mini-CV.




J.Scott Milton, M.D.
J. Scott Milton, MD

Dr. Milton received his Medical Degree from the University of Texas Medical School at Houston. He completed an internal medicine residency at the Medical College of Georgia and an infectious disease fellowship at Vanderbilt University. Before joining the faculty at Texas Tech Medical School in Amarillo he was in private practice for twelve years at Amarillo Diagnostic Clinic.

Dr. Milton serves on a number of professional committees including the Infectious Disease Epidemiologic Workgroup for the Texas Department of State Health Services. His research interests include Influenza, community acquired MRSA and Travel Medicine. He is board certified in internal medicine and infectious diseases. Download Dr. Milton's mini-CV.




J. Rush Pierce, Jr., M.D.
J. Rush Pierce Jr., MD, MPH

Dr. Pierce graduated from Southern Methodist University in Dallas. He obtained his M.D. from the University of California, San Francisco. He subsequently did an internship and residency at Vanderbilt University Medical Center in Nashville where he was Chief Resident. He received an M.P.H. from the Medical College of Wisconsin.

Dr. Pierce was the Local Health Authority for the Amarillo-Bi-City-County Health District from 1995 until 2009. As Local Health Authority, Dr. Pierce was very involved with emergency response planning efforts for agents of bioterrorism and pandemic influenza. Dr. Pierce's research interests include organizational issues of local public health departments, and population based strategies for control of communicable diseases and poor health behaviors. In 2209, Dr. Pierce joined the faculty at the University of New Mexico where he serves with the Division of General Internal Medicine as an academic hospitalist. He is board certified in internal medicine, geriatrics, general preventive medicine and public health. Download Dr. Pierce's mini-CV.




Afzal Siddiqui, Ph.D.
Afzal A. Siddiqui, M.Phil., PhD

Dr. Siddiqui received his PhD degree from the University of Western Ontario, London, Canada. He has served as Chief of Parasite Immunology at the East Tennessee State University School of Medicine and has been a Research Health Scientist in the Department of Veterans Affairs. He was a Senior Research Fellow at the Harvard School of Public Health and a Researcher in the Helminthic Disease Branch of the Centers for Disease Control and Prevention. Currently, Dr. Siddiqui is a Professor of Microbiology & Immunology; Internal Medicine and Pathology. He also serves as an Associate Dean of the Graduate School of Biomedical Sciences.

Dr. Siddiqui's research emphasis is on vaccine discovery, development and testing for human parasite Schistosoma mansoni as well as on Strongyloides stercoralis hyperinfection. His research program is funded through the National Institutes of Health and Thrasher Research Fund. Click here to learn more detailed information on Dr. Siddiqui's research program. Download Dr. Siddiqui's mini-CV.




Yan Zhang, Ph.D.
Yan Zhang, PhD

Dr. Zhang is an Assistant Professor in the Department of Family and Community Medicine. She received her doctorate in health services research at Old Dominion University College of Health Sciences. Her pre-doctoral education was completed at Beijing University of Traditional Chinese Medicine (Bachelor of Medicine) and China Academy of Traditional Chinese Medicine (Master of Medicine). She is also a licensed acupuncturist in Texas.

Dr. Zhang's research is focused on health services research, targeting vulnerable populations of the elderly, women and minorities. She has extensive knowledge in research methodology and statistical principles and techniques. In addition to designing clinical and epidemiology studies that show and predict the seriousness of diseases, she also evaluates health behaviors and assesses the effectiveness of medical interventions. Download Dr. Zhang's mini-CV.