Benefits end date after a layoff after 12 years as a nurse's aide

I am not sure what date my benefits stop after being let go as a nurse's aide. This is my first time dealing with any of this. The letter is unclear about dental and vision. Did coverage match what HR said?

Ask HR to confirm the exact date in writing. I also called the insurance company to double-check.

I moved my appointments earlier while coverage was active. It saved me a bill.