Surgical Center Used by Rivers Part of Outpatient Push

The surgery center where comedian Joan Rivers suffered complications is among a class of medical facilities created by doctors that is attracting more patients and higher revenues from routine procedures and minor surgeries.

Yorkville Endoscopy Center, which opened last year in a luxury doorman building on New York’s Upper East Side, was started by four practicing doctors and an investor group to perform gastroenterology procedures. In documents filed in 2011 with the New York State Health Department, the group said it was seeking to open the center to perform procedures the doctors were doing in their private office-based practices.