While many patients do desire some level of spiritual interaction with their doctors, MDs should approach the situation cautiously, says Dr. Peter Ubel at The Atlantic:

‘As physicians, we interact with patients during some of the most important moments of their lives—at their births and at their deathbeds, at events bursting with spiritual significance. And yet most of us are afraid to talk about spirituality with our patients, much less discuss religion, out of fear that such conversations would be inappropriate.’

Possible Preaching Angle:

It's a great way to illustrate the need for prayer. Even doctors (some doctors, anyway) know the power of prayer and the benefit of praying to the "Great Physician" with their patients