• Eugene C Rich, Kristanna Peris, Marlena Luhr, Arkadipta Ghosh, Linda Molinari, and Ann S O'Malley.
• Mathematica, Washington, DC, USA. erich@mathematica-mpr.com.
• J Gen Intern Med. 2023 Nov 1; 38 (15): 341434233414-3423.

BackgroundBroader primary care practice range of services (ROS), defined as the diversity of professional services delivered, is associated with lower utilization. ROS provided by individual primary care physicians (PCPs) varies considerably with unclear implications for patients.ObjectivesCreate a PCP-ROS measure covering six categories of outpatient services, including expanded codes for mental health counseling services and point of care ultrasound (POCUS) technology in physician offices. Determine whether PCP-ROS is associated with total Medicare expenditures, inpatient admissions, acute hospital utilization (AHU), and emergency department (ED) visits. Examine physician and practice characteristics associated with PCP-ROS.DesignRetrospective cohort study.Participants4,569,711 Medicare fee-for-service beneficiaries and 27,008 PCPs observed during the evaluation of the Comprehensive Primary Care Plus (CPC +) initiative.MeasurementsPCP-ROS, hospitalizations, AHU (includes observation stays as well as inpatient admissions), ED visits, and total Medicare expenditures.ResultsPhysicians varied substantially in the range of services provided. Broader PCP-ROS was significantly, independently associated with 1 - 3% lower Medicare expenditures (p ≤ 0.01), inpatient admissions (p ≤ 0.027), AHU (p ≤ 0.025), and ED visit rates (p ≤ 0.000). PCP-ROS score was associated with improved patient outcomes, independent of physician provision of procedures (such as laceration repair or skin excisions). Physicians in practice sites affiliated with a hospital or health system had narrower PCP-ROS than independent physicians by 0.3 to 0.4 (p < 0.001). Internal medicine specialty was associated with narrower PCP-ROS than family medicine by 0.3 (p < 0.001).ConclusionsPatients 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.© 2023. The Author(s), under exclusive licence to Society of General Internal Medicine.

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