Joan Rivers 1933-2014 "Can we talk....?"

Maybe she wasn't really having throat surgery and was having plastic surgery again and that is why she was not in a real hospital to begin with.
 
I would think if you have plenty of money and at her age, you could have plastic surgery which is normally done at a surgery center, done at a hospital instead (if that's what she was doing).
 
Police tell PEOPLE there was an "81-year-old female transported from a doctor's office on 93rd Street to [Manhattan's] Mount Sinai Hospital in critical condition." By afternoon, her condition was upgraded to stable condition.

According to reports, the Fashion Police star's daughter, Melissa Rivers, is headed to her mother's side.

Rivers has been as active as ever recently, making headlines last month for walking out on a CNN interview – an incident that David Letterman later jokingly referenced by walking out himself when she appeared on his show.

Rivers promoted her new book, Diary of a Mad Diva, at the New York City Time & Life Building, where PEOPLE is located, on Wednesday.


Source:http://www.people.com/article/joan-rivers-stops-breathing-surgery