Association of the Range of Outpatient Services Provided by Primary Care Physicians with Subsequent Health Care Costs and Utilization.

Patients cared for by primary care physicians who provide a broader range of services subsequently experience lower acute care utilization and expenditures than do those cared for by physicians with narrower ROS. Practice leaders and professional associations should consider how best to ensure that primary care physicians efficiently and effectively provide the office-based professional services most needed by their patients.