Health Insurance - notice from past employer about eligibility WWYD
I retired early at the end of June 2025 from teaching at 52, before I was of official retirement age. I was vested, but didn't have 30 years in to get my full benefits. I currently have insurance through our state exchange for myself and my 2 daughters, costing us $1400 a month.
I got a letter from my previous employer, stating that they reviewed my records and I am eligible to join their health insurance, costing $550. The criteria for eligibility were vague - worked 30+ hours a week or be rehired with 26 weeks. I was rehired in that time frame, but as a sub. I worked probably 20 days last year. Subs do not qualify for health insurance.
I called and went in and was told I got the letter because I am eligible to join their plan. I questioned them, but they just keep saying I am eligible. The letter says I would have insurance through Dec 2026 and could fill out the paperwork to continue for the next year (if I still meet the eligibility requirements).
Is it worth it to save $850 a month for the next six months, knowing that I might have to go back on the exchange at that time? Could they at some point say that I wasn't eligible and I needed to pay the full price?