Final answer:
Balance billing is the term used when a provider bills you for the difference between their charge and the allowed amount.
Step-by-step explanation:
The term for when a provider bills you for the difference between their charge and the allowed amount is Balance Billing. Balance billing occurs when a provider charges you for the remaining amount that your insurance does not cover. For example, if a provider charges $100 for a service, but your insurance only allows $80, the provider may bill you for the remaining $20.