Rivers died Sept. 4 at age 81. The city's medical examiner found she died of brain damage due to lack of oxygen when she stopped breathing during an endoscopy days earlier.
The federal Centers for Medicare Services said Friday that Yorkville Endoscopy will have until March 2 to comply with requested changes. A message left at the clinic was not immediately returned.
The clinic had already presented a plan to correct problems uncovered during an investigation after Rivers' death. But the CMS said it remained deficient and terminated the accreditation. Officials didn't comment on the reversal.