You also might want to check the traditional Med Channels: 463.0000/468.0000 for Med-1 and progressing up in .025 (I believe) steps. Those are still used in many areas, but I know there were some changes in NJ. MONOC went to a much more complex system, and I'm not sure if the rest of the State followed.
Commonly, in my days in NJ, and the current practice since CMC's MEDCOMM Folded when they were bought out by MONOC, BLS does not call into ERs. They just show up unannounced. ALS Regulations (as long as they havent changed) still dictate the necessity for online medical control ie - limited standing orders with a large amount of direction provided by the ER doctor.
In a lot of places, NYC being one of them, Paramedics have been given a lot of freedom in the treatment they provide, so patient reports are a lot less detailed and occasionally not even given because the theory behind it is "the ER is going to be busy regardless, so just let them show up."
But, I digress
Try the Med Channels.. that might be your best bet, or as stated above JEMS-2 155.340 is the old "HEAR" system, but its non-repeated VHF, so the range that you hear off of even a Mobile Radio might be limited.
Happy Scanning!
Scott