Perhaps it would be better to have the ratings be done by a survey of customers?
(And of course an independent private ratings agency like the Better Business Bureau or Underwriters Laboratories would be best).
Assuming customers are competent to evaluate the quality of their care, which at least in some areas, might be quite problematical, when it is all a matter of statistical odds and how an institution ranks in the pecking order vis a vis a certain illness or procedure, as opposed to attentiveness and bedside manner and wait times and so forth.