When a medical provider does not have a contract or payment agreement with an insurer (often called a nonparticipating or out-of-network provider), the insurer generally does not pay based on a negotiated contract rate. Instead, reimbursement is commonly determined using a UCR methodology— Usual, Customary, and Reasonable charges. “Usual” refers to the typical charge a provider makes for a service; “customary” reflects what providers in the same geographic area commonly charge for that service; and “reasonable” considers whether the charge is appropriate given the circumstances and local market norms. Under many major medical plans, the insurer pays a percentage of the UCR amount (subject to deductibles and coinsurance), and the patient may be responsible for any difference between the provider’s billed charge and the insurer’s allowed UCR amount (often referred to as balance billing , where permitted).

The other choices do not match standard insurer payment terminology: “absolute” and “relative” fee are not the typical reimbursement basis described for noncontracted providers, and “non-scheduled plan customary fee” is not the recognized standard method used in these plan provisions.