The Mount Sinai Hospital | 85,584 followers on LinkedIn. The Mount Sinai Hospital is one of the nation's oldest, largest, and most respected hospitals, and a member of the Mount Sinai Health System. The Mount Sinai Health System is an integrated health system committed to providing distinguished care, conducting transformative research, and advancing biomedical education. Structured around seven member hospital campuses and a single medical school, the Health System has an extensive ambulatory network and a range of inpatient and outpatient services—from community-based facilities to tertiary and quaternary care.