Christiana Hospital ?
I'm not sure about a phone card for ld's but all in all anytime you check in to Christiana Care they charge your home phone bill $10. At least this was true when I worked in telecommunications. People used to make calls and bill to their home # through the hospital operator. I left there before phone cards, I guess you can do that yourself from the room with a card.
All of your local calls are covered under the $10 phone charge but a prepaid phone card is a good idea if you will be needing to make long distance calls. Whatever you do, try and avoid collect calls from there. Lat time I made one it was $14 + change for a *** TWO *** minute collect call... Sheesh, they spank you on that one!