Final answer:
The usual fee charged by doctors within the same locality is known as Usual, Customary, and Reasonable (UCR) fees. This differs from the fee-for-service model where fees are based on individual services performed, as well as the HMO model which pays a fixed fee per patient.
Step-by-step explanation:
The range of the usual fee charged by doctors in the same locality is known as Usual, Customary, and Reasonable (UCR) fees. This is option C in the multiple-choice question provided. UCR fees are a way of describing the standard rate or range of fees that healthcare providers in a geographic area typically charge for services. This system of payment is different from the fee-for-service model where doctors receive fees for each individual service they perform, which can lead to a higher number of services and potentially unnecessary medical spending.
In contrast, Health Maintenance Organizations (HMOs) operate on a fixed-fee basis per patient, seeking to avoid overuse of medical services by paying providers a set amount for each enrolled patient irrespective of the number of services provided.