Meet the residents and preceptors

Katelyn Witherspoon, PharmD is a PGY-1 pharmacy resident at Henrico Doctors’ Hospital. She received her Bachelor of Science in Mathematics and Biology from North Carolina State University in 2020. Her clinical interests include infectious diseases, internal medicine, and critical care. Her current projects include assessing bleed risk for patients receiving bivalirudin during percutaneous coronary intervention and evaluation of appropriate use of 2nd line antimicrobial prophylaxis in surgical patients.

Brianna Brown, PharmD is the emergency medicine clinical specialist at Henrico Doctors’ Hospital. She received her doctor of pharmacy degree from the University of Tennessee Health Science Center in 2022. She completed her PGY1 pharmacy residency at CJW Medical Center in Richmond, VA and her PGY2 in Emergency Medicine at First Health Moore Regional Hospital in Pinehurst, NC. She joined the clinical pharmacy team in 2024.

Emily Chambers, PharmD, BCOP, practiced as an oncology and infusion services clinical specialist for 17 years before transitioning to Clinical Pharmacy Manager at Henrico Doctors’ Hospital. She is excited to offer a rotation in clinical pharmacy management and administration. Emily joined Henrico Doctors’ Hospital in 2006 when she began her PGY1 pharmacy practice residency. She is a graduate of Virginia Tech where she received her B.S. in biology and went on to receive her pharmacy degree from the Medical College of Virginia at Virginia Commonwealth University. She has been a preceptor to students and residents since 2007 at HCA’s Henrico Doctors’ Hospital.

Jason Sarashinsky, PharmD, BCPS is an oncology and infusion services clinical specialist. Dr. Sarashinsky's practice includes inpatient services in medical and surgical oncology as well as an outpatient infusion center. He also covers medical surgical practice in the Cardiac, Renal and Pulmonary unit. Dr. Sarashinsky has been with HCA since 2005, first as a clinical pharmacist and clinical specialist at CJW Medical Center, Johnston-Willis Hospital. He joined Henrico Doctors’ Hospital in 2024. He is a graduate of the University of Illinois, Urbana, where he received his B.S. in biology, and then went on to receive his pharmacy degree from the University of Illinois, Chicago campus. Dr. Sarashinsky completed a pharmacy practice residency at Penn State Hershey Medical Center prior to joining HCA. He has been a preceptor to students and residents since 2007 at HCA’s CJW Medical Center-Johnston Willis Hospital, as well as Henrico Doctors' Hospital.

Rebeccah J. Collins, PharmD, BCPS is the PGY1 Residency Program Director and Director of Pharmacy at Henrico Doctors’ Hospital and serves as preceptor for the drug information component of the Orientation rotation. Dr. Collins received her Doctor of Pharmacy degree from the Virginia Commonwealth University in 2000, completed a Pharmacy Practice Residency at Virginia Commonwealth University Health System in 2001, and has been a Board Certified Pharmacotherapy Specialist since 2004. Dr. Collins previously served as Inpatient Pharmacy Manager at Virginia Commonwealth University Health System and as the PGY1 Residency Director and Education Coordinator for Bon Secours Virginia. She also practiced as Antimicrobial Stewardship Team Lead at Memorial Regional Medical Center and Bon Secours Mercy Health System. Prior to becoming a residency director, Dr. Collins was an Assistant Professor of Pharmacy and Family Medicine at the Virginia Commonwealth University, Medical College of Virginia. She still holds an appointment with Family Medicine and is now an Affiliate Associate Professor of Pharmacy at VCU. She currently teaches pharmacy students in the clinical area of Infectious Diseases and offers advanced practice professional experiences. She received the VCU mentor award in 2011 and the preceptor of the year award in 2015. She is a co-founder of the Stewardship Interest Group of Virginia and serves on the statewide HAI advisory group. She serves as the chair of the Virginia Society of Health-System Pharmacists Resident-Student committee

Amy Cook, PharmD, BCPS is the Critical Care clinical specialist in the surgical intensive care unit and pharmacist for the Trauma service at Henrico Doctors’ Hospital. She is the preceptor for the Critical Care required rotation, Trauma Transitions of Care required longitudinal rotation, and serves as the Residency Program Coordinator. Dr. Cook received her Bachelor of Science in Chemistry with a minor in Music- vocal performance at Virginia Wesleyan University in 2011. She completed her Doctor of Pharmacy degree from Virginia Commonwealth University in 2015. She completed her PGY-1 pharmacy residency at Bon Secours Memorial Regional Medical Center in Mechanicsville, Virginia. She has been precepting pharmacy residents and APPE pharmacy students since 2017. She joined the Henrico Doctors’ Hospital team in 2021.

Daniel Miller, PharmD, BCPS, BCCP is the Cardiac Clinical Specialist and primary preceptor for the Cardiology rotation. Dr. Miller earned his doctor of pharmacy degree from Duquesne University in 2008. He completed residency training at the Medical University of South Carolina. His previous roles include Clinical Pharmacy Manager at HCA’s John Randolph Medical Center, Cardiology Clinical Specialist at Bon Secours Memorial Regional Medical Center, and Clinical Pharmacist II, Cardiovascular Services at Manatee Memorial Hospital. Dr. Miller joined the team at Henrico Doctors’ Hospital in 2021

Christina Olmsted, PharmD, BCPS, is a 2007 graduate of the Virginia Commonwealth University School of Pharmacy and completed a PGY1 pharmacy practice residency at Virginia Commonwealth University Health System. She has been with Henrico Doctors Hospital as the Kidney Transplant Specialist since July 2008 and precepts the Ambulatory Care – Solid Organ Transplant rotation.

Christina Fox, PharmD, is the preceptor for the Neonatology rotation at Henrico Doctors’ Hospital. She received her Bachelor of Science in Biology at George Mason University with a minor in Legal Studies in 2002. She completed her pharmacy degree at the Medical College of Virginia at Virginia Commonwealth University in 2008. Upon graduation, she worked as a Clinical/Staff Pharmacist at CJW Medical Center, Johnston-Willis Campus. She joined Henrico Doctors’ Hospital in February of 2010. Dr. Whitehill was a recipient of an Outstanding Preceptor Award from Virginia Commonwealth University in 2013.

Rachel Perry, PharmD is the infectious diseases clinical specialist for the three campuses at Henrico Doctors’ Hospital. Rachel received her pharmacy degree from the University of Florida in 2020. She completed her PGY1 pharmacy residency at Pennsylvania Hospital in Philadelphia, PA and her PGY2 in Infectious Diseases at Maine Medical center in Portland, ME. Her practice interests include antimicrobial stewardship and treatment of multi-drug resistant organisms.

Sydney Omohundro, PharmD, BCPS is an internal medicine clinical specialist at Henrico Doctors’ Hospital. She serves as the preceptor for the required internal medicine rotation and the outpatient cardiopulmonary rehabilitation longitudinal rotation. Dr. Omohundro graduated from Virginia Tech with a B.S. in Human Nutrition, Foods, and Exercise and then received her Doctor of Pharmacy degree from VCU. She also completed a post-baccalaureate certificate in aging studies while at VCU and completed her PGY1 pharmacy residency at HDH. Dr. Omohundro joined the clinical pharmacy team in 2023.