Good question. I don’t have a good answer for everyone accross the country but these are good resources.
http://mariamindbodyhealth.com/Forum/index.php?board=10.0
http://lowcarbdoctors.blogspot.com/
But in River Falls there is a great doctor named Dr. Kelle Anderson. She a great functional medicine doctor that has actually been to some of our classes!
http://www.olivetreemedicine.com/home