Dependent coverage on a parent plan usually ends around the month you turn 26. That loss of coverage can open a Marketplace Special Enrollment Period.
Call the licensed agent on the household before the birthday month. Bring the parent plan termination date. Do not wait for a bill to bounce.
The household portal shows plans already on this record. It does not enroll you in a new plan by itself.
Your licensed agent can read a deeper version in Field Notes: open the broker article.
FAQ
Short answers you can use on a call with your agent.
Does coverage always end on my birthday?
Many parent plans end at the end of the birth month. Your plan documents control the exact day. Ask the agent on that household.
Devkrest