What event allows for enrollment in a health insurance plan outside of the usual open enrollment period?

Enrollment in a health insurance plan outside of the usual open enrollment period can occur during a special enrollment period. This type of enrollment is specifically designed to accommodate individuals who experience qualifying life events, which typically include situations such as marriage, birth of a child, loss of other health coverage, or other significant life changes. These events trigger the opportunity to enroll in a health plan or make changes to existing coverage, reflecting the need to adapt to new circumstances.

On the other hand, the other options do not pertain to enrollment in health insurance. A financial audit relates to business processes and does not create an opportunity for health insurance enrollment. An annual review of coverage is generally a process for assessing the adequacy of a health plan but does not facilitate enrollment. Similarly, a mandatory policy revision refers to changes imposed by insurers or regulators, which again, does not imply a new enrollment opportunity for individuals. Therefore, only a special enrollment period provides the necessary mechanism for individuals seeking insurance outside of the standard enrollment window.