Which Special Enrollment Period (SEP) allows a beneficiary to change their plan when the provider network changes significantly?

The correct choice is the Special Enrollment Period for Significant Change in Provider Network. This SEP specifically addresses situations where a beneficiary's current Medicare Advantage plan undergoes significant changes to its provider network. When such a change occurs, beneficiaries may find that their preferred doctors or healthcare providers are no longer available under their current plan.

This Special Enrollment Period ensures that beneficiaries have the opportunity to reevaluate their options and, if necessary, switch to a different plan that better suits their healthcare needs and maintains access to their desired providers. The focus on significant changes in the provider network highlights the importance of continuity in care for beneficiaries, allowing them to make choices that support their health and well-being.

In contrast, other options refer to different scenarios. For instance, the Low Stars Rating SEP indicates eligibility for beneficiaries affected by low-quality ratings of their current plans. The Enrollment Error SEP pertains to situations where a mistake was made during the enrollment process, while the CMS Sanction SEP relates to actions taken against a plan by the Centers for Medicare & Medicaid Services due to noncompliance. Each of these SEPs serves a distinct purpose, emphasizing the unique situations that may arise in the context of Medicare enrollment.