Here’s an example:
The doctor bills $500.
On the bill it shows:
Total Charge: $500
Insurance Adjustment: ($400)
Amount Paid By Insurance: $00.
Amount Due From Patient: $100.
This happens all the time.
Everything appears on the up and up with yours.
If you had no ins, you would owe the entire $500 in your example, if you were on medicaid you'd owe $0. I know there's something wrong with that but that's the way it is.