For health coverage needs outside of the Open Enrollment Period, you may still sign up for an ACA health plan throughout the year if you qualify for a Special Enrollment Period. A Special Enrollment Period allows you to sign up for, or change, an ACA health plan for you and your family outside of the annual Open Enrollment Period. To qualify for a Special Enrollment Period, you must experience a qualifying life event such as having or adopting a baby, getting married or divorced, moving, or losing your health coverage to name a few.