When does the enrollment period begin for those who lost employer group health coverage?

The enrollment period for individuals who have lost employer group health coverage begins in the month that the loss of coverage occurs. This is part of a Special Enrollment Period (SEP) that is designed to allow individuals to promptly secure Medicare coverage in response to changes in their health insurance situation.

When someone loses their employer-sponsored health insurance, it triggers the ability to enroll in Medicare without having to wait for the general enrollment period, which typically occurs once a year. This SEP acknowledges the importance of timely health coverage and helps ensure that individuals do not experience a gap in their health insurance.

The other options misinterpret the timing associated with the loss of coverage. For instance, starting enrollment one month after the loss or during the next general enrollment period would not provide the necessary immediate access to coverage that people need after losing their employer-based plans. Thus, the correct choice reflects the system's intention to allow beneficiaries immediate access to Medicare services in light of significant life changes.