Payment, or one of the regular periodic payments, an annuitant makes for an annuity.

Time between each benefit payment in an annuity contract.

Ownership shares in a variable annuity’s separate account fund after the accumulation period ends. Annuity units are purchased with accumulation units and are used to establish benefit payment amounts. See also accumulation units.

Located front to back.

Phrase used in describing two x-ray projections or views (front to back and side) in the radiological examination.

Medicare regulation that limits the amount that can be billed by a physician or group practice for the technical component of diagnostic tests (excluding clinical diagnostic tests performed by clinical laboratories) that are performed by an outside supplier.

Statute in most states that it is illegal practice by an insurance agent to discount or return any portion of his or her commission to encourage an applicant to buy or renew an insurance policy.

Laws that forbid a physician from referring a patient to receive a service or supply in which the referring physician has a financial relationship to the supplier. Also known as Stark I Regulations and Stark II Regulations.