Sending NICU a Xmas card

Christina • SAHM to 2 boys; Hairstylist
I'd like to send a Xmas card to the nurses at our NICU unit thanking them for caring for our son and updating them on his great progress. Does anyone know how you would do that? Would you just mail the card straight to the hospital specifying the NICU unit? Just not sure about how to do this and would want to make sure it got to the nurses. TIA ladies