Remember Opt-in/Opt out? CMS has rescinded a previously announced rule that would have required dentists (who provide dental care and prescriptions for Medicare Advantage patients and Part D beneficiaries) to be enrolled in Medicare or to have opted out in order for their services to be covered. CMS will use a preclusion list as a substitute for the enrollment/opt-out requirement. The final rule will take effect June 15, and CMS will begin using the preclusion list on Jan. 1 2019.