Checking my last day of health coverage, bookkeeper here

I am not sure what date my benefits stop after being let go as a bookkeeper. I do not usually post, so bear with me. I do not want to be surprised by a bill. What should I do about appointments?

Dental and vision sometimes end on a different date from medical. Mine did.

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