I worked as both a NJ EMT and MICP (I'm no longer current). Most ER staff is usually "bothered" by a BLS ambulance calling and stating they are en route with someone who is not seriously sick or injured. When I called the hospital and gave them a patient report, their only response would often be, "Okay." Then you'd go through it all over again when you got there.
If someone is very sick or injured, and advanced life support (paramedics) are tending to the patient, the paramedics or medical control doc will usually pick up the phone and call the ER doc directly. Paramedic report is usually done via cellular now. Once upon a time in the days before cellular telephone, they used the UHF MED channels. The HEAR radio was never used in NJ for medical control as it was in other states.
Broadband is coming into the picture. At that point, there will be voice, data, and video capabilities between the crew and physician. That would all be done over cellular.
And, yes, this is not subject to HIPAA.
BTW, neither Newton Medical Center nor Atlantic Health have a HEAR radio license for that facility, so unless it expired a long time ago and they just left the equipment plugged in, you probably won't hear much from them.