Abstract

Practice guidelines are an increasingly relevant feature of health insurance. One hundred and seventy-eight million people in the United States have some form of private health insurance coverage; coverage for 150 million of them is employment-related. Traditionally, this coverage was provided by employers purchasing a group contract under which an insurance carrier provided indemnity coverage for employees—that is, the insurance company paid all usual, customary, and reasonable charges incurred by an employee for medical care, subject in some cases to an annual deductible and to a percentage of covered expenses, co-paid by the employee, for each service. In recent years, however, employers in greater numbers have switched to so-called self-insurance plans in which employees’ health care claims are paid directly by the employer.