Hoag[1] is a not-for-profit regional health care delivery network in Orange County, California, that treats nearly 30,000 inpatients and 350,000 outpatients annually.

[6] Hoag Neurosciences Institute incorporates diagnostic technologies, treatment modalities and integration of medical specialists to deliver the care for all complex neurological disorders, including: Alzheimer’s/dementia, brain tumors, brain aneurysms/vascular malformations, epilepsy, headache/pain syndromes, movement disorders/Parkinson's disease, multiple sclerosis, sleep disorders, spinal disorders/tumors, and stroke.

[9] Hoag recently became the first hospital in California to offer tomosynthesis[10] or 3D mammography for women with dense breast tissue.

They began a fund-raising campaign in the local community and changed the name to the Presbyterian Hospital of Orange County after securing a site on the bluffs in Newport Beach.

[13] These corporate members annually elect the board of directors, which includes representatives from the Hoag community and medical staff, as well as the chief executive officer.