Meet the Preceptors
Karen Frock, Pharm.D., BCPS, BCCCP received her Pharm.D. from the University of Maryland School of Pharmacy in 2000. She completed a PGY1 and a PGY2 residency in Critical Care at WellSpan York Hospital. After completion of residency training she began clinical practice in the trauma and surgical ICUs at WellSpan York Hospital. Her practice involves providing pharmacotherapy for patients with traumatic injury as well as surgical critical care patients. In addition to being the Residency Program Director for the PGY2 programs, Karen serves as preceptor for the Trauma Surgical ICU rotation for PGY1 and PGY2 residents. She also precepts the PGY2 longitudinal drug information, teaching, and practice administration and staffing experiences. Karen is involved with various hospital committees including WellSpan Pharmacy and Therapeutics, Drug Shortage, Trauma Performance Improvement, Trauma Guidelines, Enhanced Recovery after Surgery (ERAS), and Blood Utilization Review. She was the recipient of the 2009 Pennsylvania Society of Health-System Pharmacists Joe E. Smith Award.
Alisha Mutch, Pharm.D, BCPS received her Pharm.D. and a B.A. in English from Wilkes University in 2009. She completed a PGY1 residency at WellSpan York Hospital. After residency training, she initially served as a clinical pharmacist at WellSpan York Hospital before transitioning to clinical coordinator for the pharmacy department in 2012. Her primary practice area is internal medicine with a resident service, both on general medicine floors. For the residency program, she share shares preceptor responsibilities for consult orientation and is the primary preceptor for Internal Medicine. She currently serves on numerous committees including P&T, Drug Shortage, and Pharmacy Scheduling Committee. Alisha is a member of ACCP. She also serves as adjunct faculty for Notre Dame University School of Pharmacy, University of Pittsburgh, and Wilkes University.
Robert Patti, Pharm.D., J.D., CACP received his his B. Pharm and Pharm.D. from the University Of Maryland School Of Pharmacy and his JD from the University of Baltimore. With WellSpan York Hospital since 1997, Robert currently serves as manager of clinical pharmacy services. Serving as Legislative chair for the Pennsylvania Society of Health-System Pharmacists from 1994-2002, Rob has been actively involved in health care related legislation impacting the practice of pharmacy in Pennsylvania. He has also served as PSHP president from 2003-2004. Robert was awarded the PSHP Board of Directors award in 2002 and the PSHP Pharmacist of the Year award in 2006.
Alison Sabados, Pharm.D., BCCCP received her Pharm.D. from Wilkes University in 2011. Ali completed her PGY1 and PGY2 Critical Care residencies at York Hospital. Following residency training, Ali began clinical practice with cardiothoracic surgery in 2013 and currently rounds with the interdisciplinary teams in the cardiac and open-heart ICUs. She is also involved with several committees including the WellSpan Critical Care Steering Committee, Heart Failure, Extracorporeal Membrane Oxygenation (ECMO), and Ventricular Assist Device (VAD) Steering Committees. Ali serves as Residency Program Director for the PGY1 program and precepts the cardiology and cardiovascular ICU rotations for PGY1 and PGY2 residents.
Ryan Sentz Pharm.D., BCPS, received his Pharm.D. from the University of Pittsburgh in 2005. With WellSpan York Hospital since 2000, he started as a student intern, transitioned to a clinical pharmacist, and to a clinical coordinator, and most recently to Operations Manager for the pharmacy department. As Manager of Operations, he oversees all distributive operations for the department. Ryan works with residents during their administrative rotation and on various projects.
Molly Walbrown, Pharm.D., BCPS, CACP, CDE is a graduate from West Virginia University School of Pharmacy in 2004. She completed her pharmacy practice residency with an emphasis in ambulatory care at the VA Pittsburgh Healthcare System at the University of Pittsburgh in 2005. She joined the WellSpan York Hospital Pharmacy Team in 2005 and currently serves as a preceptor for PGY1 residents during their internal medicine and ambulatory care rotations. Molly’s unique role expands beyond WellSpan York Hospital into the outpatient area where she provides clinical pharmacy services to diverse and underserved patients in the community. As a Certified Diabetes Educator, she has been able to work not only directly with patients but also within multi-disciplinary teams throughout the system. She served as Chair of the system wide WellSpan Diabetes Clinical Effectiveness Team from 2007-2017. Awards she has won include WellSpan Health Outstanding Educator in 2006, WellSpan Pharmacy Preceptor of the Year in 2015, and WellSpan Patient Safety Award in 2017.
Aundrea Rosenberger, Pharm, BCIDP graduated from Wilkes University in 2012 and completed her PGY1 residency at WellSpan York Hospital in 2013. Aundrea joined our pharmacy team following residency and has been instrumental in establishing and improving antimicrobial stewardship programs across the health system. She precepts residents during their infectious disease rotations and assists with consult orientation. Aundrea's data analysis skills are highly valued during the resident research process.
Brittany Thomas, Pharm.D., BCPS, BCIDP received her Pharm.D. from Notre Dame of Maryland University School of Pharmacy in 2016. She completed a PGY1 Pharmacy Practice Residency at WellSpan York Hospital. After completion of residency training, she began practice as a clinical pharmacist at WellSpan York Hospital and joined the antimicrobial stewardship team in 2018. Her practice involves optimizing antimicrobial regimens for patients throughout the hospital and assisting in various stewardship initiatives. She serves as a preceptor for the Infectious Disease core and elective rotations. Brittany is involved with various hospital committees including WellSpan Pharmacy and Therapeutics and the System-Wide Antimicrobial Stewardship committee.
Chelsea Laughner, Pharm.D., BCPS received her Pharm.D. from Lake Erie College of Osteopathic Medicine School of Pharmacy in 2016. She completed a PGY1 Pharmacy Practice Residency at WellSpan York Hospital. After completion of residency training, she began practice as a clinical pharmacist at WellSpan York Hospital and transitioned into a critical care role in 2021. Chelsea serves as a preceptor for the medical ICU rotation for PGY1 and PGY2 residents and coordinates the emergency/code Simulation Lab experience. She is involved in various committees including WellSpan Pharmacy and Therapeutics, Quality Assurance, and Epic Workflow Optimization.
Christine Higgins, R.Ph., BCPS
Alyssa Robertson, Pharm.D., BCPS, BCCCP received her degree from Philadelphia College of Pharmacy, University of the Sciences in 2012. She completed a PGY-1 Pharmacy Practice residency at CJW Medical Center in Richmond, VA and a PGY-2 Critical Care residency at the Hospital of the University of Pennsylvania in Philadelphia, PA. Starting her pharmacy career as an intern at WellSpan York Hospital in 2006, she briefly acted as a Pharmacy Coordinator before transitioning to her current role in Emergency Medicine. Her clinical practice includes sepsis management, participation in codes and trauma resuscitation, stroke management, toxicology, and many other areas.
Matthew Walbrown, Pharm.D., BCPS
Dalton Fishel, Pharm.D., BCCCP
Benson Mathew, Pharm.D., BCPS
Geoffrey Arentz, Pharm.D., BCPS received his Pharm.D. from Wilkes University in 2016. He completed his PGY1 residency at WellSpan York Hospital in 2017. After completion of his residency, he began working as a clinical pharmacist at WellSpan York Hospital. Geoffrey rounds in the intensive care units and assists with pharmacotherapy management for critically ill patients. He also works with the antimicrobial stewardship team to optimize antimicrobial regimens for patients throughout the hospital and assists in various stewardship initiatives. Geoffrey serves on the Pharmacy and Therapeutic Committee and the Antimicrobial Stewardship Pharmacy Subcommittee. Geoffrey precepts residents during their Neuroscience ICU and antimicrobial stewardship experiences.
Joseph DiBlasi, Pharm.D., BCPS, M.B.A.
Matthew Crouse, Pharm.D., BCPS
Karli Unick, Pharm.D., BCPS received her Pharm.D. from Shenandoah University in 2015. She completed a PGY1 residency at WellSpan York Hospital. After completion of residency training, she transitioned into a clinical pharmacist position where she was able to develop and extend pharmacy services into the Neonatal Intensive Care Unit (NICU). Her practice involves providing pharmacotherapy for patients admitted to the NICU. Karli serves as a preceptor for the NICU rotation, which is an elective for PGY1 and PGY2 residents. Karli also participates on interdisciplinary committees including NICU Practice and Quality and Neonatal Care.
Yasmeen Alcheikh, Pharm.D., BCPS
Albert Trona, R.Ph. received his Pharmacy degree from the University of the Sciences in Philadelphia in 1985. He has been involved with mentoring and training students, PGY1 residents, PGY2 residents, and new practitioners at York Hospital. Albert was instrumental in implementing automated dispensing cabinets hospital wide. He is the Pharmacy liaison for the Anesthesia providers and the Operating Rooms. As a member of the Pharmacy Quality Assessment and Workflow Committees, Albert is actively involved in quality improvement initiatives to improve pharmacy services throughout WellSpan. Albert is responsible for overseeing the distributive activities including sterile compounding parenteral products, order verification, pharmacy operations, and automated dispensing procedures for the PGY1 and PGY2 residents. Albert has also earned his WellSpan Leadership Certificate in 2004. Albert oversees the Longitudinal Distributive Learning Experience for the PGY1 and PGY2 residents.
Todd Fry, R.Ph. received his BS from Temple University in 1984. With WellSpan York Hospital since 1984, he served as the Pharmacy Operations Manager from 2005 to 2020 when he transitioned to Director of Pharmaceutical Care for WellSpan York Hospital and WellSpan Surgery and Rehabilitation Hospital.
Christine "Chris" Reed joined WellSpan Health in 1997 as a pharmacy technician. In 2000, Chris successfully completed her technician certification. Chris transitioned into her current role as Administrative Assistant for the WellSpan York Hospital Department of Pharmacy in 2003. Chris serves as the primary resource for all residency applicants. She organizes applications and answers questions about the application process.
