We have already noted the implications of the Health Reform clarification that Stark violations can generate false claims. Little appreciated is the potential focus by whistleblowers on physician internal compensation formulas. To meet the definition of a "group practice" under Stark, compensation formulas must comply with the law. There is both more flexibility than most people understand, but also real liability lurking here since, while most of the Stark settlements have involved hospitals with non-compliant relationships with physicians, physician groups submitting claims for services which cannot comply with the definition of a "group practice" are vulnerable as well. In "The Stark realities your group needs to know" Alice elucidates issues which should be confronted in designing competition. Given the changes in the law, it is time for group practices that provide designated health services within them to revisit their compensation formulas.