Nothing tricky about it. It's a very common practice. Many hospitals with offer big discount after an insurance has paid on the patient's balance if paid in short order.

Glad to hear the financial impact was bearable.

I had a heart valve fixed last August. I was OOP (out of pocket) $2500. My ded. is $1500 and then it is 90/10 of the next $10,000. Not a bad share of $83,000.