Got an overpayment notice, what now?

I received a letter saying I was overpaid about $1100 on my claim. Any experience at all would help. I cannot afford to repay it all at once. Are payment plans possible?

I asked for a waiver and a plan in the same call, and they gave me both forms. It was less scary than I expected.

Keep everything in writing and save the confirmation numbers. It saved me later.