To be eligible for Health Care FSA Carryover funds, do I have to actively re-enroll for a Health Care FSA in the new plan year?

No. If you do not actively enroll in a Health Care FSA for the next plan year, but you still have funds available to carry over (up to $550), you will be automatically enrolled in a Health Care FSA for the new plan year but your election amount will be set to $0 prior to the carry over occurring.

You are only able to carry over funds for one year if you do not re-enroll in a Health Care FSA.