My son got his first official letter when we was about two weeks old. It was a bill from the hospital for his birth: $8,000. He was directly charged on that bill, not us parents.

And that was on top of the $24,000 bill that we had received from hospital. So $32,000 for a no-frills (from a medical viewpoint) birth and that was many years ago.

The health insurance paid 100% of both bills, so we ended up not following up.