The term "hospital bills" refers to the charges incurred for medical services, treatments or procedures provided by a hospital. These may include fees for doctor visits, laboratory tests, x-rays, medications and other medical supplies, as well as accommodation costs if the patient is admitted overnight. Hospital bills can vary greatly depending on factors such as the type of treatment required, the length of stay in the hospital, and whether or not a patient has insurance coverage for their healthcare expenses. In some cases, patients may be responsible for paying these charges out-of-pocket, while others may have their bills covered by private medical insurance, government programs such as Medicare or Medicaid, or through negotiated rates with the hospital.