Medical bills refer to the invoices or statements that are sent by healthcare providers, such as hospitals and doctors, to patients for payment. These bills detail the services provided, including procedures, treatments, tests, medications, and hospital stays, along with their associated costs. Medical bills can also include charges for medical equipment, supplies, or prescription drugs. The amount owed by a patient may be covered in whole or part by insurance, but patients are often responsible for paying deductibles, co-payments, and any amounts not covered by their insurance plan.