.. a doctor pal is telling me a certain provider is asking any doctor clients she runs into for pill prescriptions .. just wondering if that's a "lose your license to practice" sort of thing if you got exposed?  Would a doctor really do something like that?  Seems crazy for a woman to even ask.

unless she is his patient, it's illegal.  
My guess is she is looking for pain killer and something like that.  

Yes you will find doctor who do crazy shit like that or  even worst things.
Remember the doctor who walked out a surgery to cash a check, left the patient on the table for over an hour.

Another provider to stay away from!!!!

A couple years ago there was a dentist down on the cape arrested and lost his license for this same thing. It was all over the news "dentist arrested for trading sex for prescription pain killers". No one in their right mind would risk everything like that. I am sure your physician buddies won't repeat. Talk about ruining the mood.

2 dr's are still fighting a 7 year deal.   lost there licenses and still not found guilty....dr would be nuts to do such a thing