Research
In 1967, Geisinger was awarded a federal grant to study the effectiveness of medications to prevent heart attacks or their recurrence. In 1974, the Central Pennsylvania Chapter of the Arthritis Foundation awarded a grant to Geisinger to study the potential treatment of Raynaud syndrome with drugs normally used to treat high blood pressure at that time.
Geisinger has a database of electronic health records (EHR), and set up a genetics research program called MyCode in 2007. The use of EHR allows longitudinal study of patient outcomes through a study called "DiscovEHR". The program uses gene sequencing by the biotechnology company Regeneron Pharmaceuticals. The National Institutes of Health awarded a grant of US$5.5 million to the research program in 2016. The program was expanded to include whole exome sequencing in 2018. Using the patient volunteers' genetic data stored in its MyCode program, Geisinger has conducted or collaborated on genetic research studies aimed at identifying potential links between genetic variants and risk factors for certain diseases. Geisinger contributed data from 35,000 of its patients to a 2016 Johns Hopkins University study that demonstrated linkages between asthma and fracking. In 2021, a Regeneron-led study partially based on genetic data from the MyCode biobank identified a genetic variant that appears to lower obesity risk.
Facilities
Geisinger operates over 100 care sites including 10 hospitals.
Danville
Geisinger Medical Center (GMC) is the organization's flagship hospital in Danville. It is an adult level I trauma center, and the adjoined Janet Weis Children's Hospital is a pediatric level II trauma center.
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Bloomsburg
Geisinger Bloomsburg Hospital (GBH), formerly Bloomsburg Hospital, was acquired by Geisinger in 2012. It is located in Bloomsburg.
Centre County
Geisinger Healthplex State College is a clinic with 41 exam rooms and a surgical suite. Geisinger completed an expansion of the healthplex in January 2025.
Geisinger collaborates with Mount Nittany Medical Center, and Life Flight is contracted with Centre Lifelink EMS.
In 2024, Geisinger opened a new medical clinic in Bellefonte, consolidating services including urgent care and primary care.
Jersey Shore
Geisinger Jersey Shore Hospital in Jersey Shore became a level IV trauma center in 2021. A helipad was added for Life Flight.
Lackawanna County
Geisinger Community Medical Center (GCMC) in Scranton is a level II trauma center.
Geisinger Marworth is located in Waverly.
Lewistown
Geisinger-Lewistown Hospital (GLH) is located in Lewistown. In 2012, Geisinger Health System and Lewistown Hospital signed a letter of intent for a merger. Independent physicians had opposed a merger with Geisinger, stating that with the presence of a Geisinger clinic in Lewistown and with Geisinger offering health insurance, a monopoly might result from the merger, ultimately hurting instead of helping local healthcare. The full merger and integration of Lewistown Hospital into Geisinger Health System received final approval from the Pennsylvania Attorney General and the Pennsylvania Department of Health. The new Geisinger-Lewistown Hospital became effective on November 1, 2013.
GLH has offered a school of nursing since 2005. It became a level IV trauma center in 2021 and has a concrete helipad.
Orwigsburg
Geisinger St. Luke's Hospital is located in Orwigsburg.
Wilkes-Barre
Geisinger Wyoming Valley Medical Center (GWV) is a level I trauma center in Plains Township on the outskirts of Wilkes-Barre.
Geisinger South Wilkes-Barre Hospital (GSWB) is located in downtown Wilkes-Barre.
Shamokin
Geisinger Shamokin Area Community Hospital (GSACH) is located in Shamokin.
