Skip to main content

We’ve updated our Terms & Conditions and Privacy Policy. By using this site, you agree to these terms.

Sarah F. Hale, PharmD, BCPPS
Director of Pharmacy, Geisinger Medical Center 
PGY1-PGY2 HSPAL Residency Program Director

Sarah Hale graduated from Duquesne University’s Mylan School of Pharmacy in 2007. After graduation, she accepted a clinical pharmacist position at Geisinger Medical Center working in pediatrics. She completed a PGY1 pharmacy practice residency at Albany Medical Center and a scholarship of teaching and learning program through Albany College of Pharmacy and Health Sciences in 2012, followed by a PGY2 residency in critical care and pediatrics in 2013. Dr. Hale has served as a lecturer at Albany College of Pharmacy and Health Sciences and is adjunct clinical faculty for the Department of Pharmacy Practice at Wilkes University School of Pharmacy. She has published in the areas of pediatric immunizations and medication safety and serves as a reviewer for the American College of Clinical Pharmacy (ACCP) and the American Society of Health-System Pharmacists (ASHP) for pediatric pharmacy review and recertification programming for board-certified pediatric pharmacists. She serves on several committees, including the Residency Advisory Committee, the Medication Utilization Evaluation Committee, the Formulary Steering Committee and the Pharmacy and Therapeutics Committee. Dr. Hale is active in both the PGY1 and PGY2 residency programs at Geisinger and as a preceptor for the pharmacy administration learning experience. Her professional interests include pediatric critical care, medication safety and pharmacy education.

Michael A. Evans, RPh, MBA, FASHP
Vice President, Enterprise Pharmacy
Chief Pharmacy Officer

Michael Evans is the vice president of Enterprise Pharmacy and is responsible for overall strategy development, administrative oversight and leadership for pharmacy services at Geisinger. He is a graduate of the Philadelphia College of Pharmacy and received an MBA in Healthcare Management from Western Governors University. He and his pharmacy leadership team have successfully built a robust network of pharmacy programs for Geisinger’s integrated delivery system. The programs consist of Hospital programs, Medication Therapy Disease Management programs, Retail Pharmacies, Mail Order Pharmacy, Specialty Pharmacies, Telepharmacy, Managed Care Pharmacy, Infusion Pharmacy, Formulary Services, Informatics, Center for Pharmacy Innovation and Outcomes (CPIO), Pharmacy Fellowship and Residency programs and Pharmacy Planning and Strategy. All 400+ pharmacists in Enterprise Pharmacy are in a collaborative practice model independent of site of practice, which facilitates moving Geisinger Pharmacy Programs to the forefront of multidisciplinary patient care focusing on quality, satisfaction, access and value.

Sara Gaines, PharmD, BCPS
Director, PGY1 Pharmacy Residency Program
Clinical Pharmacist, Hepatology
Geisinger Medical Center

Sara Gaines is a graduate of Ohio Northern University Raabe College of Pharmacy. She earned her Doctor of Pharmacy in 2008. After graduation, she completed a PGY1 pharmacy practice residency at Conemaugh Memorial Medical Center in Johnstown, Pa. Following her residency, she worked at the same facility and implemented an antimicrobial stewardship program and practiced in an outpatient HIV and neurology clinic while staffing in the inpatient pharmacy. While in this position, she was an adjunct assistant professor at the University of Pittsburgh, Johnstown, teaching pharmacology to nursing students and served as a preceptor to both PGY1 pharmacy residents and pharmacy students. In 2012, Dr. Gaines accepted a position at Upstate Medical Center in Syracuse, N.Y., as an inpatient pharmacist and practiced in the central pharmacy as well as decentralized locations throughout the facility. In 2016, she accepted a newly created position in ambulatory care at Geisinger Medical Center in the gastroenterology/hepatology clinic. Her professional interests include infectious diseases, transplant and teaching/precepting students and residents.

Stephanie Gill, PharmD
Assistant Director of Pharmacy, Geisinger Medical Center

Stephanie Gill is a graduate of the University of Pittsburgh School of Pharmacy. She earned her Doctor of Pharmacy in 2002. She had been practicing as a clinical pharmacist at Geisinger Medical Center since 2003. Dr. Gill has practiced in a number of different areas of hospital pharmacy, including nephrology and solid organ transplant.

Robert Granko, PharmD, MBA, FASHP
System Director, Pharmacy Innovation Alliance

Robert Granko is the system director of Enterprise Pharmacy, Pharmacy Innovation Alliance at Geisinger. His previous experience includes roles as director of field pharmacy services with Premier and director of pharmacy at the Moses H. Cone Memorial Hospital. He held multiple senior pharmacy leadership positions at University of North Carolina Healthcare. Dr. Granko earned his Bachelor of Science in Pharmacy from Long Island University School of Pharmacy, his PharmD from the UNC Eshelman School of Pharmacy and his MBA from Pfeiffer University School of Graduate Studies. He maintains an academic appointment as an associate professor of clinical education and serves as course director at the UNC Eshelman School of Pharmacy in the combined MS/Health-System Pharmacy Administration and Leadership Program. He has been active in the American Society of Health-System Pharmacists (ASHP’s) Section of Pharmacy Practice Leaders since 2008, completing his term as director-at-large of the section’s executive committee in 2020. Additionally, his service includes membership within the Section of Pharmacy Practice’s Advisory Groups on Emerging Leaders as well as Strategy and Industry Disruptors. He is past chair of the SAG on Manager Development, a participating content member for the Conference for Pharmacy Leaders Steering Committee, and a Pharmacy Forecast Survey Panel Member. He was past faculty with ASHP’s Managers Boot Camp and ASHP’s Australia Leadership Boot Camp for the Society of Hospital Pharmacists of Australia. Dr. Granko served as an ASHP delegate representing North Carolina. In 2011, he was part of a team awarded an ASHP Best Practices Award. In 2013, Dr. Granko and his team were awarded the Leadership Excellence in Pharmacy Award (LEAP) Gold Award for research in clinical benchmarking. In 2016, he was awarded the ASHP Section of Pharmacy Practice Managers Distinguished Service Award and in 2018, he was recognized as an ASHP fellow. In 2021, Dr. Granko successfully led the NC Association of Pharmacists (NCAP) Fellow Practitioner Recognition Program Task Force. In 2022, Dr. Granko began his two-year appointment to the American Journal of Health-System Pharmacy Editorial Board as co-contributing editor for pharmacy leadership. He has authored over 30 publications and has been invited to present nationally and internationally on topics related to leadership development, clinician well-being and resilience, operations management, finance, benchmarking, and data and analytics.

Stacey Grassi, PharmD, CACP
Assistant Director, Medication Therapy Disease Management, Family Practice

Stacey Grassi is a graduate of the Nesbitt School of Pharmacy at Wilkes University. She earned her Doctor of Pharmacy degree in 2002. She completed a PGY1 pharmacy residency at Geisinger Medical Center in 2003. After her residency, she accepted a position as a clinical pharmacist at Geisinger, where she practiced in the areas of general internal medicine, nephrology, hematology and oncology, and ambulatory anticoagulation. In 2013, she accepted the regional coordinator of Ambulatory Clinical Pharmacy Programs position for Geisinger’s Central Region. In 2016, Dr. Grassi accepted the position as assistant director of Ambulatory Clinical Pharmacy Programs for the Central Region, where her oversight included anticoagulation, diabetes, hypertension, lipids, heart failure, asthma, COPD, pain therapy, addiction medicine, hepatitis C, IBD, anemia in CKD and pregnancy, and transplant. In 2021, she accepted the position of assistant director of Ambulatory Clinical Pharmacy Programs to have oversight of all Family Practice Clinics in the Geisinger system. She serves on the residency advisory committee at Geisinger Medical Center for both the PGY1 Pharmacy Practice Residency and also the PGY1/PGY2 HSPAL Pharmacy Residency Program. Dr. Grassi is an adjunct assistant professor in the Department of Pharmacy Practice at the Nesbitt School of Pharmacy at Wilkes University. She has also earned her Center for the Advancement of Pharmacy Practice certification.

Jerry Greskovic, RPh, MBA
System Director, Ambulatory Disease Management

Jerry Greskovic is a graduate of the Philadelphia College of Pharmacy at the University of the Sciences. He earned his Bachelor of Science in Pharmacy in 1991 and in 2020 received an MBA in healthcare management from Western Governors University. He spent 11 years working in retail pharmacy, pharmacy management and hospital pharmacy before accepting a position in 2002 as a clinical pharmacist for Geisinger, specializing in chronic disease management. In his current role as system director, Mr. Greskovic is responsible for the oversight of Geisinger’s Retail, Home Infusion, Specialty and Mail Order Pharmacies. In addition, he oversees Geisinger’s Pharmacy Call Center, Pharmaceutical Reimbursement and Financial Assistance Department and its award-winning Medication Therapy Disease Management (MTDM) Program, which was the recipient of the 2016 American Society of Health-System Pharmacists (ASHP) Award of Excellence and the 2016 Pennsylvania Society of Health-System Pharmacists (PSHP) Innovative and Collaborative Practice Award. Mr. Greskovic serves on the Philadelphia College of Pharmacy and Science Board of Visitors, co-chairs PSHP’s Ambulatory Care Task Force and in 2020 was honored to receive PSHP’s Pharmacist of the Year Award.

Kelly Guza, PharmD, BCPS, BCPPS
System Director, Acute Disease Management

Kelly Guza is a graduate of the Philadelphia College of Pharmacy at the University of the Sciences. She earned her Bachelor of Science in Pharmacy in 1998 and Doctor of Pharmacy in 1999. She has practiced as a clinical pharmacist at Geisinger Medical Center since 1999 and has experience in many different areas, including internal medicine, nephrology, anticoagulation medication therapy management and pediatrics. Dr. Guza practiced as a pediatric clinical pharmacist, specializing in pediatric intensive care and pediatric hematology and oncology for 10 years prior to taking a management role as assistant director of Geisinger’s Central Region. In her current role, she oversees pharmacy clinical programs for the acute care setting across the health system. Dr. Guza is an educator for the pharmacy leadership rotation.

David Klinger RPh, MHL 
System Director, Operations and Compliance 
David Klinger is a graduate of Temple University and earned a Master of Healthcare Leadership from Western Governors University. He also completed the American Society of Health-System Pharmacists’ Pharmacy Leadership Academy. Mr. Klinger has been with Geisinger since 2004. During his tenure at Geisinger, he has practiced as a clinical pharmacist in several areas, including internal medicine and hematology/oncology. He also spent five years as director of pharmacy at Geisinger Medical Center and three years as associate vice president for acute care pharmacy. Mr. Klinger has led projects related to the opening of several hospital and surgical center pharmacies. He also led the implementation of automated dispensing cabinets (ADCs) in the operating rooms as well as the systemwide upgrades of existing ADCs. He is responsible for the oversight of Geisinger’s 340B, medication safety, corporate compliance, controlled substance management and automated medication dispensing programs. 

Staley Lawes, PharmD, BCPS, FISMP 
Assistant Director of Pharmacy, Geisinger Medical Center 

Staley Lawes received a PharmD from Philadelphia College of Pharmacy in 2010. She accepted a position as a clinical pharmacist at Geisinger Medical Center working in internal medicine from 2010 to 2014. Then she moved to New Jersey, where she worked as a staff pharmacist at CentraState Medical Center. In 2015, she created a pharmacy position in the Emergency Department with the goal of improving admission medication reconciliation. Dr. Lawes completed a fellowship with the Institute for Safe Medication Practices (ISMP) in 2017 and subsequently accepted a position as medication safety officer at JFK Medical Center. In 2022, she rejoined Geisinger Medical Center in Danville as assistant director of pharmacy. Dr. Lawes serves on the newsletter advisory board for ISMP. Her professional interests include medication safety and quality improvement.

Daniel S. Longyhore, PharmD, EdD, BCACP
System Director, Knowledge Management

Dan Longyhore is a graduate of the Nesbitt School of Pharmacy and the School of Education at Wilkes University. He completed a pharmacy practice residency with Palmetto Health Richland in Columbia, S.C., and family medicine pharmacy residency with St. Louis College of Pharmacy and St. John’s-Mercy Medical Center in St. Louis, Mo. As a system director, Dr. Longyhore oversees pharmacy residency programs for Geisinger and directs the professional development and collaborative practice agreements for pharmacists in the health system. He is an active member of the American College of Clinical Pharmacy and serves as director of their Teaching and Learning Certificate Program Academy.

Leslie Shumlas, PharmD
Pharmacist, Geisinger Health Plan

Leslie Shumlas is a health plan pharmacist at Geisinger Health Plan. She received her Doctor of Pharmacy from Wilkes University in 2019. Dr. Shumlas completed a PGY1 managed care pharmacy residency at Highmark Inc. in Pittsburgh, Pa., also earning a teaching and learning certificate through Duquesne University. She has experience in utilization management, evidence-based medicine, medication therapy management, case and disease management, as well as data analytics.

Leeann Webster, RPh, MBA
Director, Medication Therapy Disease Management

Leeann Webster is a graduate of the University of Pittsburgh School of Pharmacy and a 2019 graduate of The University of Scranton Kania School of Management. She is also a certified diabetes care and education specialist. She practiced as a clinical pharmacist in Geisinger’s Medication Therapy Disease Management (MTDM) Clinics for 15 years before moving into an administrative role within the program for the past six years. Ms. Webster’s responsibilities include oversight of Geisinger’s MTDM programs and Telepharmacy Refill Call Center. Geisinger’s MTDM Program includes 77 clinical pharmacists embedded within 67 primary care and specialty clinics who manage chronic disease under a collaborative practice agreement with the providers. The Telepharmacy Refill Call Center includes 31 pharmacists and 61 technicians who manage all refill requests and medication-related electronic communication within the health system — approximately 89,000 encounters per month. Geisinger’s clinical pharmacist collaborative practice model provides patients with acute and chronic disease management of multiple chronic disease states including, but not limited to, anticoagulation, diabetes, heart failure, COPD, pain management, neurology/MS, oral chemotherapy, rheumatology, hepatitis C, transplant, endocrinology, dermatology and the home-based medical care program Geisinger at Home. The MTDM program was named the recipient of the American Society of Health-System Pharmacists (ASHP) Award of Excellence for 2016 and a finalist in medication safety for chronic pain management.

Durga Zally, PharmD
Director, Hematology-Oncology Pharmacy Services

Durga Zally is a graduate of Midwestern University School of Pharmacy. Prior to receiving her Doctor of Pharmacy, she earned a Bachelor of Science in Biotechnology from William Paterson University and was employed as an analytical R&D scientist at Hoffman-La Roche. Prior to her career at Geisinger, Dr. Zally practiced as a clinical pharmacist at HealthSouth Rehabilitation Hospital as well as Mount Nittany Medical Center in Pennsylvania. She was also previously a pharmacy manager as well as a staff pharmacist at Target Pharmacy. Dr. Zally joined Geisinger as a hematology/oncology clinical pharmacist in 2014 at Geisinger Windmere and Scenery Park, advancing to the role of assistant director for hematology/oncology in 2018. She continues to redesign and advance pharmacy’s role in hematology/oncology at Geisinger through her role as systemwide director of hematology/oncology pharmacy.

Adriene Zook, PharmD  
Pharmacy Manager, Ambulatory Clinical Pharmacy Programs – Family Practice 

Adriene Zook is a graduate of Philadelphia College of Pharmacy, where she earned her Doctor of Pharmacy in 2011. Upon graduation, Dr. Zook continued her time transitioning from a graduate extern to a licensed clinical pharmacist, ultimately landing in Geisinger Montoursville Family Practice, where she began the MTDM services there. Her practice grew and she remained in this role for nearly nine years until taking the position of regional manager for ambulatory programs for Geisinger’s Central Region. After a January 2022 leadership restructure, Dr. Zook remains a pharmacy manager but has oversight of the entire Family Practice Ambulatory Pharmacy Program, assisting the clinical pharmacists embedded at the primary care locations with program growth and development, day-to-day workflow asks and requirements, and quality and data tracking tasks. Through her role as a preceptor for the administration rotation, Dr. Zook can continue to capture her passion for education not only for her providers and pharmacists, but the pharmacy residents as well.