1 The Causes, Treatments, and Symptoms of Acute Thyroiditis The thyroid gland is a butterfly-shaped gland located in the middle of the lower neck. 2  Its main purpose is to control the body's metabolism, which is the rate at which your bâ¦.
Medicare is divided into a hospital insurance program and a supplementary medical insurance program. The Medicare hospital insurance plan is funded through Social Security payroll taxes.
Medicare Definition. Medical necessity from a Medicare perspective. is defined under Title XVIII of the Social. Security Act, Section 1862 (a) (1) (a): âNo payment may be made under Part A or. Part B for expenses incurred for items or. services which are not reasonable and. necessary for the diagnosis or treatment of.