Try the actual hospital comm freq on the DTRS for Mercy hospital. This is the only one i found: 8146 DMERCY MEDMercy Medical Center Hospital.
side note, here in the springs they do ambulance to hospital comms all day long. They never use the name or SSN. It goes something like "Were in route to your facility with a 40 "four"-"zero" age male who is complaining of neck pain after a fall off a 10 foot ladder. Pulse is XXXX over XXXX, stong and regular, blood sugar is XXXX, patient is responsive to commands, we have him on nasal canna and he is talking to us. Any questions or commands?"