Happens all the time within families.
With Obamacare, it will be happening outside of Families too.
Reminds me of a story from my M-I-L. When she and her Husband were visiting Europe, she had a Medical problem, can’t remember what it was.
The Doctor at the Clinic there gave her some Medicine to treat it. When they got home, she went to see her own Doctor and took the Prescription with her to show him. He took one look at it and threw it away. He told her that in this Country, the Medicine she was given was used to treat Horses.