Actually, according to HIPAA, any exchange of information is only to be used specifically for the treatment needed. And, only that information that is pertinent to the treatment being provided. Your pharmacy is not privy to any info other than what is needed for the medications they are about to dispense to you. It only occurs after the patient or guardian has given permission for this outside facility to treat the patient or the patient to be transferred to that facility. Then the information exchange occurs.
I’m not sure this is the information you needed, but I’m kind of lost as to what “list” you could be talking about. Hospitals and other facilities are very strict about the information they have on a patient and how that information is traded and when it can be traded to another facility. It is NEVER used as a mailing LIST or any other marketing type.