Sibley Hospital is using UHF DMR frequencies for communications now, having switched from VHF analog some time ago. Here's the latest line-up:
463.5875 [ ] Security (DMR - Color Code 1, Slot 1, Group 1)
464.2000 [ ] Engineering (DMR - Color Code 1, Slot 1, Group 1)
Nothing was monitored on the other frequency on the license (461.9500).