Geisinger Health System (GHS) is an integrated health services organization that provides a wide range of medical and surgical specialties and sub-specialties, and related health services. It offers a range of medical services for patients suffering from diseases related to cardiology, ENT, gastroenterology, gynecology, cancer, obstetrics, ophthalmology, orthopedics and pediatrics, infectious diseases, and others. The organization also provides Life Flight regional helicopter ambulance services. It operates through twelve hospital campuses and two research centers. GHS serves residents across 45 counties in central, south-central and northeast Pennsylvania. The organization operates along with its affiliates and subsidiaries throughout the US. GHS is headquartered in Danville, Pennsylvania, the US.