If you are losing your job-based group employee coverage, you may be entitled to enroll in COBRA continuation coverage. The rates for COBRA are often quite high and you may be able to enroll in the ACA marketplace or other qualified coverage that may be more affordable for you. This is especially the case if you qualify for premium financial assistance.
Losing group employer coverage is considered a Qualifying Event and would entitle you to a Special Enrollment Election Period. You would then have 60 days from the date of losing your group coverage to enroll in a new individual plan without having to wait for the Annual Open Enrollment Period.
Keep in mind that if you elect to take COBRA continuation coverage and then terminate it later on before it's expiration date, this action would not qualify you for a Special Enrollment Period to take other outside coverage, so it is good to thoroughly analyze whether taking COBRA is the right choice in the first place.