Saint Lukes Health Network
- Integrated regional health care network, encompassing 868 beds in five hospitals, 1,200 physicians, more than 4000 employees and nearly 1,000 volunteers. (Bethlehem)
- http://www.slhn-lehighvalley.org/

Jefferson Health System
- An alliance of numerous health care facilities serving the greater Philadelphia region. Information on the members of the System, health related resources, find a doctor and community resources.
- http://www.jeffersonhealth.org/

Chestnut Hill HealthCare
- A not-for-profit integrated health system providing a full spectrum of services in northwestern Philadelphia and eastern Montgomery County.
- http://chh.org

Conemaugh Health System
- Serves west central Pennsylvania. Provides a full range of services including treatments and technologies related to heart, vascular, cancer, neuroscience, and women's care.
- http://www.conemaugh.org/

Albert Einstein HealthCare Network
- A private, not-for-profit organization with five major facilities and many outpatient centers. Located in Philadelphia.
- http://www.einstein.edu/

University of Pennsylvania Health System
- Health care resources, about the hospitals in the System, research and education information. (Philadelphia)
- http://pennhealth.com/

UPMC Health System
- Integrated not-for-profit healthcare system affiliated with the University of Pittsburgh Schools of the Health Sciences. Physician Directory, Hospital Network, resources.
- http://www.upmc.com/

Vantage Healthcare Network, Inc.
- A system of healthcare providers in Northwestern Pennsylvania. (Meadville)
- http://www.vhcn.com/

Temple University Health System
- Information about the hospitals, physicians and services. Located in Pennsylvania.
- http://www.health.temple.edu/

Susquehanna Health System
- An alliance of three area hospitals, health centers, and skilled nursing units. Information on services, programs, education and training, physician finder and health resources. Williamsport, Pennsylvania.
- http://www.shscares.org/

Sharon Regional Health System
- Sharon Regional provides health care services in northwest Pennsylvania and northeast Ohio through a 288-bed hospital, 20 satellite centers and 1,600 employees.
- http://www.sharonregional.com

Saint Vincent Health System
- Group of hospitals and medical centers based in Erie with locations throughout northwestern Pennsylvania. News, doctor directory, frequently asked questions (FAQs), employment opportunities, maps and directions.
- http://www.saintvincenthealth.com/

Heritage Valley Health System
- Provides comprehensive health care for residents in southwestern Pennsylvania, eastern Ohio, and northern West Virginia. Based in Beaver, PA.
- http://www.heritagevalley.org

Health Network of the Chester County Hospital
- Provides up-to-date news, publications, directions, program and services information, a calendar, plus a search site for physicians. (Pennsylvania)
- http://www.cchosp.com

Geisinger Health System
- Founded in 1915, the System provides more than two million people in 31 counties in Pennsylvania a complete continuum of quality health care. Extensive information about the system and the numerous services provided. (Danville)
- http://www.geisinger.edu/

Crozer-Keystone Health Systems
- Includes Community Hospital, Crozer Chester Medical Center, Delaware County Memorial Hospital, Springfield Hospital at the Healthplex, Taylor Hospital and four facilities. Based in Pennsylvania.
- http://www.crozer.org/