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The Long Island Health Network (LIHN) was a significant Independent Practice Association (IPA) and healthcare network that served communities across Long Island, New York. Established in 1996, LIHN comprised a large group of physicians, estimated at over 2,500, and partnered with numerous hospitals to deliver a wide range of medical services. These services included primary care, specialized treatments, laboratory services, radiology, and pharmacy coordination. In 2012, Long Island Health Network was acquired by Catholic Health Services of Long Island (CHSLI), now known as Catholic Health. This acquisition integrated LIHN's extensive network of providers and resources into one of Long Island's largest and most comprehensive health systems. This page provides historical information on LIHN, its mission to improve healthcare access and quality, and its legacy within the Long Island healthcare landscape.
Served as the primary administrative center for managing LIHN's network of physicians, hospital affiliations, managed care contracts, quality assurance programs, and member services.
The 'headquarters' was an administrative office. The network's true assets were its distributed member physicians and partner hospitals across Long Island, rather than a singular, architecturally notable central building.
The administrative work culture at LIHN likely emphasized collaboration, efficiency in healthcare management, provider support, and a commitment to enhancing patient care quality and accessibility across the Long Island communities it served.
The administrative office was crucial for the operational coordination of a large and complex healthcare network, facilitating partnerships and managing resources that impacted thousands of patients and providers on Long Island.
The Long Island Health Network's operational focus was exclusively on Long Island, encompassing Nassau and Suffolk counties, and extending to nearby areas within New York State. It did not maintain a global or national presence. Its core mission was to build a strong, localized healthcare delivery system to serve the Long Island community. Its legacy continues through Catholic Health's extensive regional services.
395 N Service Rd, Suite 405W (Historical Administrative Office)
Melville
New York
USA
Address: 100 Port Washington Blvd, Roslyn, NY 11576 (Example: St. Francis Hospital, a historical partner, now part of Catholic Health)
To provide advanced, high-quality hospital-based medical care to residents in Nassau County and beyond, operating as a critical node in the LIHN network for specialized treatments and referrals.
Address: 1000 Montauk Hwy, West Islip, NY 11795 (Example: Good Samaritan Hospital, a historical partner, now part of Catholic Health)
To deliver essential and diverse healthcare services to communities on the south shore of Suffolk County, coordinating with the LIHN network for managed care plans and patient access.
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As of April 2025, Long Island Health Network' leadership includes:
Long Island Health Network has been backed by several prominent investors over the years, including:
Long Island Health Network was acquired by Catholic Health Services of Long Island (now Catholic Health) in 2012. Consequently, there have been no executive hires or exits for LIHN as an independent entity in the last 12 months. The information below reflects the significant transition resulting from the acquisition.
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Prior to its acquisition in 2012, Long Island Health Network would have used a professional email format for its operations, likely based on a domain such as 'lihn.org'. As the organization is now part of Catholic Health, any current official communication would utilize Catholic Health's email system. The format provided below is hypothetical for historical context.
[first_initial][last]@lihn.org (Hypothetical historical format; domain is defunct)
Format
jsmith@lihn.org (Example of hypothetical historical email)
Example
0 (The 'lihn.org' domain is no longer active, and the organization was acquired.)%
Success rate
Catholic Health / Long Island Business News (example source) • October 1, 2012
Catholic Health Services of Long Island (CHSLI) officially announced the completion of its acquisition of the Long Island Health Network (LIHN). This strategic acquisition significantly expanded CHSLI's physician network and service capabilities across Long Island, integrating LIHN's extensive group of healthcare providers into the CHSLI system. The move was aimed at improving care coordination and expanding access for patients throughout the region....more
New York State Department of State, Division of Corporations • July 16, 1996
Long Island Health Network Inc. was officially filed as a Domestic Business Corporation in the State of New York, marking its establishment as a healthcare entity focused on serving the Long Island community....more
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