Northwell Health, the city’s biggest hospital system, is in talks to buy residential and retail properties along Third Avenue on the Upper East Side for nearly $300 million. The company, which owns 18 hospitals, could knock down the properties — which are located between East 76th and 77th streets and owned by the Glick family — and build a 250,000-square-foot building, Crain’s reported. It’s not clear if Northwell plans to do that. The office of […]