[H018]

HMO--health maintenance organization

An entity with four essential characteristics:

1) an organized system for providing health care in a geographic area

2) delivering an agreed upon set of basic and supplemental health maintenance and treatment services

3) to a voluntarily enrolled group of persons

4) for which services the HMO is reimbursed through a predetermined and periodic prepayment made by or on behalf of each person or family unit enrolled in the HMO, without regard to the amounts of actual services provided.