If a patient is a practicing Christian scientist, chances are that person was not brought to the hospital by choice. Christian Scientists are opposed to medical interventions in lieu of prayer.
The stricter Anabaptist faiths (Amish, some Brethren, conservative Mennonite) will go to the hospital but only if it's the last resort.
I know there are issues in regards to organ donation and receipt in various faiths, but I can't say I've ever encountered them...and I can't remember what they are at this time.
I am a Christian as well, split between Baptist and Mennonite. I do not bring up my faith unless directly asked about it.
One of my nursing professors, Larry Purnell, wrote an awesome cultural nursing book that might interest you. If you search for him on Amazon
, you'll find it.