Unit of measurement used by managed care plans or insurance companies to find out the number of people covered in the contract or policy. The formula for determining this number is to multiply the number of plan members by 2.5.

Insurance policy provision that allows the insured to receive all or part of the policy’s death benefit before the insured’s death dependent on specific conditions. This type of rider may be used to help an insured individual pay medical expenses if he or she develops a terminal illness.

Surgical procedure of excising a kidney from a living donor and implanting it into a suitable recipient.

Legal document that states the wishes of an individual concerning life support or other medical treatment in certain circumstances, usually when death is imminent or if the person is unconscious and unable to make a decision. Also known as a medical directive, advance directive , or health care advance directive .