A patient who has received professional services from a dentist or another dentist of the same specialty who belongs to the same group practice, within the past three years, subject to state laws.
A federal insurance program enacted in 1965 as Title XVIII of the Social Security Act that provides certain inpatient hospital services and physician services for all persons age 65 and older and eligible disabled individuals. The program is administered by the Centers for Medicare and Medicaid Services (CMS), previously known as the Health Care Financing Administration (HCFA).