Which entity listed is NOT allowed to bill for medically unnecessary services?

Billing for medically unnecessary services is prohibited across the healthcare industry due to ethical, legal, and financial implications. In this context, patients are not typically in a position to bill for services themselves; instead, they receive the services and may be billed by the providers.

Patients generally do not engage in the billing process, and when they receive care, they are billed based on the services rendered by healthcare entities. Therefore, the notion of a patient billing for medically unnecessary services does not apply, as they do not have the authorization or the capacity to provide such services.

In contrast, hospitals, physicians, and ancillary providers are all entities involved in the delivery and billing of healthcare services, and they bear responsibility for ensuring that the services they bill for are medically necessary. Thus, the option that indicates patients as not being allowed to bill for such services aligns with the understanding of their role in the healthcare billing process.