I'm not from Louisville but have listened to Norton Healthcare before. I don't see ground transports in my log, I doug up all licenses used by Norton Healthcare. I would try all these freq's and see what you come up with, some are analog others are digital NXDN and DMR. The first license I list you should try first since it has the most coverage for Louisville
FCC Callsign WRBM519 (NORTON HEALTHCARE - SECURITY)
www.radioreference.com
FCC Callsign WPQJ722 (NORTON AUDUBON HOSPITAL)
www.radioreference.com
FCC Callsign WRDB660 (NORTON AUDUBON HOSPITAL)
www.radioreference.com
FCC Callsign WRCX730 (NORTON AUDUBON HOSPITAL)
www.radioreference.com
FCC Callsign WQNP601 (Norton Audubon Hospital)
www.radioreference.com
FCC Callsign WQSC438 (Norton Cardivascular Associates)
www.radioreference.com
FCC Callsign WPEB895 (NORTON HEALTH CARE, INC)
www.radioreference.com
FCC Callsign WRJU515 (Norton Healthcare)
www.radioreference.com