CMS’ most recent Stark Law rulemaking includes important changes to the rules that allow physician practices to satisfy the definition of “Group Practice” while distributing designated health services (“DHS”) – based profit shares and productivity bonuses. 85 Fed. Reg. 77492 (Dec. 2, 2020) (the “Final Rule”). As these changes go into effect January 1, 2022, and the ability to bill Medicare for DHS is often contingent on satisfying the definition of “Group Practice,” physician practices should take action now to assess their physician compensation arrangements and methodologies under the new rules.