Stakeholders say a recent CMS guidance reminding Medicare Advantage plans to take responsibility for third-party marketing actions is part of the Biden administration’s move to tighten oversight of MA plans in contrast to the Trump administration’s hands-off approach. The Oct. 8 guidance says MA organizations are responsible for making sure that marketing materials used by third-party groups are submitted to CMS before they’re used and that the marketing is not misleading any current or prospective enrollees. When marketing materials and...