Breastfeeding seems to be highly encouraged in all of the practices I've ever been in, I've never had any issues at all with HCPs. Not every health care practitioner is gung-ho about breastfeeding, but they treat it as normal. When I told my HCPs that I was breastfeeding my toddlers, I received nothing but positive responses.
FWIW, we usually go to Park Nicollet clinics. I've been to many of their locations in the south metro- Eagan, Prior Lake, Shakopee, Bloomington, St. Louis Park, in addition to Methodist Hospital, and I've never had an experience that wasn't BFing-friendly.