My friend Ginny had a great suggestion:

When you are making out your Christmas card list this year, please include the following:

We Support You During Your Recovery!
c/o American Red Cross
P.O. Box 419
Savage, MD 20763-0419

Be sure to affix adequate postage. Cards must be received no later than December 27. Cards received after this date will be returned to the sender. Again, senders are reminded that “care packages” are not part of the program–send only cards and notes. Also, please refrain from using glitter or any other inserts that would not be appropriate in a hospital environment.

-and (thanks to knitplaywithfire for this one)-

National Naval Medical Center

8901 Rockville Pike

Bethesda, MD 20889-5600