Quality of Care in Investor-Owned vs Not-for-Profit HMOs

The proportion of health maintenance organization (HMO) members enrolled in investor-owned plans has increased sharply, yet little is known about the quality of these plans compared with not-for-profit HMOs.To compare quality-of-care measures for investor-owned and not-for-profit HMOs.Analysis of the Health Plan Employer Data and Information Set (HEDIS) Version 3.0 from the National Committee for Quality Assurance's Quality Compass 1997, which...