We recently learned that Arkansas passed a "concierge" law in February of this year. It was an effort to protect DPC-ish physicians from "business of insurance" concerns. Unfortunately the authors of the legislation failed miserably in their drafting efforts.
In brief, the definition of concierge services is too vague to be useful, and other than a mandatory non-insurance disclosure the law is missing many important pieces of information that would be needed to survive judicial scrutiny.