Meet Our Physicians

Blair I. Reuben, M.D., FCAP

An Arizona resident since 2000, Dr. Reuben is board certified in anatomic pathology by the American Board of Pathology. Dr. Reuben did his undergraduate work at the University of Illinois, Champaign-Urbana campus where he graduated Phi Beta Kappa, and he received his MD degree from the University of Illinois in Chicago. After completing his four year residency at Harbor -UCLA Medical Center, he began practice in Southern California. He was in private practice at Torrance Memorial Medical Center in Torrance, California from 1987-2000.

Dr. Reuben has been with Western & Pinnacle Pathology since 2000 and is an active member of the Honor Health medical staff, with contributing roles in numerous clinical conferences and network committees. Dr. Reuben is a past president of the Arizona Society of Pathologists and is a current laboratory accreditation inspector for the College of American Pathologists. He is also a member of the American Society for Clinical Pathology, the College of American Pathologists, and the Arizona Medical Association.

Dr. Reuben has a wealth of experience in surgical pathology, breast pathology, cytology, gastrointestinal pathology, and rapid on-site evaluation of fine needle aspiration. Dr. Reuben has performed over 4,000 fine needle aspiration biopsies. He has also served in medical directorship roles and has extensive laboratory oversight and management experience. He has published and presented both locally and nationally on a variety of topics.

Christopher J. Stasik, D.O., FCAP

An Arizona resident since 1980, Dr. Stasik is board certified in anatomic and clinical pathology by the American Board of Pathology with sub-specialty certification in hematopathology. He earned a D.O. degree at the University of Health Sciences in Kansas City, Missouri followed by a residency at the University of Kansas Hospital and Medical Center. After a one-year surgical pathology fellowship, Dr. Stasik completed a second fellowship in hematopathology at the University of Arizona in Tucson.

Dr. Stasik has been with Western & Pinnacle Pathology since 2010 and is an active member of the Honor Health medical staff, with contributing roles in numerous clinical conferences and network committees. Dr. Stasik serves as the Medical Director for Honor Health Deer Valley Medical Center, Sonoran Health Emergency Center, and Honor Health John C. Lincoln Medical Center. He is a fellow of the College of American Pathologists and has been the Arizona State Commissioner for the College of American Pathologists Lab Accreditation Program since 2012. He is also actively involved with the Arizona Society of Pathologists where he has served on the executive committee since 2011, and as President for the 2017-2019 term.

Dr. Stasik has a wealth of experience in general surgical pathology with emphasis in breast pathology, cytopathology, and gastrointestinal pathology, as well as specialized expertise in hematopathology and flow cytometry. He has published and presented both locally and nationally on a variety of hematopathology-related topics.

Kevin B. Gilchrist, M.D

An Arizona native, Dr. Gilchrist is board certified in anatomic and clinical pathology by the American Board of Pathology with a sub-specialty certification in gastrointestinal pathology. Dr. Gilchrist completed his undergraduate studies at Arizona State University, Tempe campus. He completed his medical school training at The University of Arizona from which he graduated in the top 5% of his class and was elected to the Alpha Omega Alpha Honor Medical Society. Afterwards, he completed his residency at The University of Arizona and served as chief resident before completing a fellowship in gastrointestinal pathology.

Dr. Gilchrist joined Western & Pinnacle Pathology in 2011 and is an active member of the Honor Health medical staff with contributing roles in numerous clinical conferences and network committees. Dr. Gilchrist is also a member of the American Society for Clinical Pathology, the United States and Canada Academy of Pathology, the College of American Pathologists, and the Arizona Society of Pathologists.

Dr. Gilchrist has a wealth of experience in surgical pathology, breast pathology, cytology, hematopathology, and specialized experience in gastrointestinal pathology with special interest in small luminal biopsy evaluation, large oncologic resection specimens, as well as liver and pancreas biopsies. He has published and presented both locally and nationally on a variety of GI-related topics.

Trent McBride, M.D

An Arizona resident since 2011, Dr. McBride is board certified in anatomic and clinical pathology by the American Board of Pathology with a sub-specialty certification in hematopathology. Dr. McBride completed his undergraduate at Transylvania University and MD from the University of Kentucky. Afterwards, he completed his residency at the University of Kentucky, with fellowship training in hematopathology and cytopathology at Indiana University.

Dr. McBride has been with Western & Pinnacle Pathology since 2011 and is an active member of the Honor Health medical staff, with contributing roles in numerous clinical conferences and network committees. He is currently a member of the American Society for Clinical Pathology, and the College of American Pathologists.

Dr. McBride has a wealth of experience in surgical pathology, breast pathology, cytology, gastrointestinal pathology, rapid on-site evaluation of fine needle aspiration, and specialized expertise in hematopathology and cytopathology. He has gained expertise in performing and interpreting fine needle aspirations and in interpreting bone marrow and lymph node biopsies. In addition, Dr. McBride has interpreted over 4000 specimens by flow cytometric analysis.

Donald Christensen, D.O., FCAP

An Arizona native, Dr. Christensen is board certified in anatomic and clinical pathology by the American Board of Pathology. He received his D.O. degree from A.T. Still University in Kirksville, MO in 2004 and completed a combined anatomic and clinical pathology residency at the University of Arizona, Tucson campus in 2008, serving as chief resident during his final year. After completing residency, Dr. Christensen served active duty in the military as an Army pathologist, stationed at Ft Hood, TX, where his responsibilities included numerous medical directorships and section chief of anatomic pathology.

Dr. Christensen has been with Western & Pinnacle Pathology since 2012 and is an active member of the Honor Health medical staff, with contributing roles in numerous clinical conferences and network committees. He is also an active member of the College of American Pathologists, and an officer for the Arizona Society of Pathologists.

Dr. Christensen has a wealth of experience in surgical pathology, breast pathology, cytology, hematopathology, and gastrointestinal pathology. His scholarly work has been published on a variety of topics and he is a contributing author of a general surgery text. He has been recognized throughout his training and career as an exceptional and well-rounded physician, receiving awards for academic excellence, research, and leadership.