Patients, employers, and third-party payers are all calling for improv
ed measures of health care quality. This has led to the development of
''report cards,'' assessments that are many times applied not just to
health plans but also to providers. One attempt at creating a standar
dized set of quality and effectiveness measures is the Health Plan Emp
loyer Data and Information Set (HEDIS). The HEDIS measures are based p
rimarily on analyses of administrative data sets. Problems with HEDIS
measures, including the probability that plans will use different data
collection methods and a lack of risk adjustment, may result in incor
rect conclusions about the quality of care delivered by various provid
ers. An alternative method of standardized surveys is proposed that wi
ll overcome many of the limitations of the current HEDIS measures, pro
vide outcome rather than process data, and provide data for developing
interventions to improve quality.