Grass Valley is off i50 not i80.The best hotel choices in the area are probably in Folsum about 20 min away from Grass Valley.However, call the hospital and they will probably have a list of hotels that they have relationships with that do discounts.
Grass Valley, California is a small town in the northern California Sierras off Interstate 80 between Sacramento and Reno, Nevada. You may get better responses by posting your question in the Sacramento section.PS: Make sure to carry tire chains that will actually fit your car, and have the cooling system antifreeze protection level checked .
You can easily do an internet search for motels near grass valley, ca and get plenty of results