Importance:
Facing new financial incentives to reduce unnecessary spending, provider organizations may attempt to reduce wasteful care by influencing physician practices or selecting more cost-effective physicians. However, physicians’ role in determining the use of low-value services has not been well described.
Objective:
To quantify variation in provision of low-value health care services among primary care physicians and to estimate the proportion of variation attributable to physician characteristics that may be used to predict performance.
Design, Setting and Participants:
Retrospective analysis of national Medicare fee-for-service claims of 3,159,834 beneficiaries served by 41,773 generalist physicians from 2008‒2013. Multilevel modeling was employed to estimate the extent of variation in service use across physicians within region and within provider organization, adjusted for patient clinical and sociodemographic characteristics and sampling variation. The proportion of variation attributable to physician characteristics that may be used to predict performance (age, sex, MD credential, professorship, publication record, trial investigation, grant receipt, pharmaceutical/device manufacturer payment, and panel size) was estimated via additional regression analysis.
Measures:
Annual count per beneficiary of 17 primary care related services that provide minimal clinical benefit.
Results:
The average annual rate of low-value services was 33.1 services per 100 beneficiaries. There was considerable variation across physicians within the same region (SD, 8.8; 95% CI, 8.7‒8.9; 10th percentile, 21.8; 90th/10th percentile ratio, 2.03; 95% CI, 2.01‒2.06) and across physicians within the same organization (SD, 6.1; 95% CI, 6.0‒6.2; 10th percentile, 25.3; 90th/10th percentile ratio, 1.61; 95% CI, 1.60‒1.63). Observable physician characteristics accounted for only 4.4% of physician variation within region and 1.4% of physician variation within organization.
Conclusion and Relevance:
Physician practices may substantially contribute to low-value service use, which is prevalent even among the least wasteful physicians. Because little variation is predicted by measured physician characteristics, direct measures of low-value care provision may aid organizational efforts to encourage high-value practices.