Hospitals take compliance issues very seriously; the incentives are skewed highly in one direction.
Consider it an extension of "HR is there to protect the company, not you." Compliance is there to protect the hospital, not the individual employee that may have erred.
As long as they make a good faith effort to act on the complaint, they themselves are protected from liability. Whereas if they don't act, they open themselves up to enormous liability, on behalf of a replaceable peon - I mean, on behalf of a highly respected staff member.