RXR Realty has signed a 500,000 square foot lease at 237 Park Avenue with New York-Presbyterian Hospital. The hospital system, the largest in New York City, had been searching for a new administrative headquarters where it can consolidate non-medical offices spread across various buildings into one location. RXR bought the 1.2 million square foot, 21 story office building in 2013 for $800 million. The building will be 100-percent leased once the hospital system takes occupancy. Terms of the lease were not disclosed.