Mount Sinai Health System

Mount Sinai Health System is a major academic health network based in New York City, providing patient care, medical education, and research across the region, including parts of Long Island. While its flagship hospitals and academic centers are primarily located in Manhattan, the system also serves Long Island patients through hospital, outpatient, physician, and specialty-care connections in Nassau County and beyond.

Anchored by the Icahn School of Medicine at Mount Sinai, the system is widely known for specialties such as cardiology, oncology, orthopedics, neurology, and other advanced clinical services. Through a mix of hospital-based care and community-focused programs, Mount Sinai plays a significant role in the broader New York metropolitan area healthcare landscape.

For appointments, department hours, insurance participation, visitor policies, and location details, it is best to check the official Mount Sinai website or contact the specific office or hospital before visiting, as services and availability may change.

Mount Sinai on Long Island

Mount Sinai Health System’s best-known Long Island presence is Mount Sinai South Nassau in Oceanside, a full-service hospital serving residents of Nassau County and surrounding communities. In addition to hospital care, the system may offer physician offices, outpatient services, and specialty programs at select Long Island locations.

• Mount Sinai South Nassau (Oceanside)
• Mount Sinai outpatient and specialty care centers (select Long Island locations)

These connections extend Mount Sinai’s reach beyond New York City, giving many patients access to a large academic health system closer to home while still linking them to specialized services at its Manhattan campuses when appropriate.

Services and Specialties

Mount Sinai offers a broad range of medical services, including emergency medicine, cardiovascular care, cancer treatment, orthopedics, neurology, women’s health, and other specialty programs. Its hospitals and affiliated practices are known for combining research-informed treatment with patient-centered care, and some locations may offer access to clinical trials or advanced therapies.

The system also emphasizes coordinated care, helping patients move between community-based facilities on Long Island and more specialized services in New York City when needed.

Academic and Research Leadership

As part of a major academic medical institution, Mount Sinai Health System is closely tied to medical research and physician training. The Icahn School of Medicine at Mount Sinai is recognized for work in areas including cancer, cardiovascular disease, neuroscience, genomics, and precision medicine.

This integration of education, research, and clinical care helps connect patients with evolving medical knowledge and specialty expertise across the system.

---

Mount Sinai Health System Headquarters in Manhattan

---

Key Facts & Details

Category	Information
Organization	Mount Sinai Health System
Headquarters	New York, NY
Type	Integrated academic health system
Coverage Area	New York City, Long Island, and the surrounding metropolitan region
Affiliation	Icahn School of Medicine at Mount Sinai
Long Island Presence	Mount Sinai South Nassau in Oceanside, along with select outpatient and specialty services
Services	Emergency care, cardiology, oncology, orthopedics, neurology, and additional specialty care
Research Focus	Precision medicine, cancer, cardiovascular disease, genomics, and related biomedical research
Website	mountsinai.org

Mount Sinai Health System adds another important layer to Long Island’s healthcare network, connecting local patients to one of the region’s most prominent academic medical institutions while expanding access to advanced care, specialty expertise, and hospital services close to home.