The address to Primary Children's Medical Center is 

100 North Mario Capacchi Drive, Salt Lake City, Utah 84113

Phone: 801-662-1000

For a map that you can print out go to 

http://intermountainhealthcare.org/xp/public/documents/pcmc/map.pdf

Little John is in the Pediatric Intensive Care Unit or PICU (pronounced pick you).  I hope this helps all of you that are wanting to go down to visit Little John, Marlo & Tony.