Founded in 1904, Greater New York Hospital Association (GNYHA) is a trade association representing more than 160 hospitals an ... d health systems in New York, New Jersey, Connecticut, and Rhode Island. GNYHA is a dynamic, constantly evolving center for health care advocacy and expertise, but our core mission—helping hospitals deliver the finest patient care in the most cost-effective way—never changes. GNYHA works to ensure that our member hospitals have the tools to succeed. read more