Quality and efficiency in small practices transitioning to patient centered medical homes: a randomized trial

Abstract

Background: There is growing evidence that even small and solo primary care practices can successfully transition to full Patient Centered Medical Home (PCMH) status when provided with support, including practice redesign, care managers, and a revised payment plan. Less is known about the quality and efficiency outcomes associated with this transition.

Objective: Test quality and efficiency outcomes associated with 2-year transition to PCMH status among physicians in intervention versus control practices.

Design: Randomized Controlled Trial.

Participants: Eighteen intervention practices with 43 physicians and 14 control practices with 24 physicians; all from adult primary care practices.

Interventions: Modeled on 2008 NCQA PPC®-PCMH™, intervention practices received 18 months of tailored practice redesign support; 2 years of revised payment, including up to $2.50 per member per month (PMPM) for achieving quality targets and up to $2.50 PMPM for PPC-PCMH recognition; and 18 months of embedded care management support. Controls received yearly participation payments.

Main measures: Eleven clinical quality indicators from the 2009 HEDIS process and health outcomes measures derived from patient claims data; Ten efficiency indicators based on Thomson Reuter efficiency indexes and Emergency Department (ED) Visit Ratios; and a panel of costs of care measures.

Key results: Compared to control physicians, intervention physicians significantly improved TWO of 11 quality indicators: hypertensive blood pressure control over 2 years (intervention +23 percentage points, control -2 percentage points, p =0.02) and breast cancer screening over 3 years (intervention +3.5 percentage points, control -0.4 percentage points, p =0.03). Compared to control physicians, intervention physicians significantly improved ONE of ten efficiency indicators: number of care episodes resulting in ED visits was reduced (intervention -0.7 percentage points, control + 0.5 percentage points, p = 0.002), with 3.8 fewer ED visits per year, saving approximately $1,900 in ED costs per physician, per year. There were no significant cost-savings on any of the pre-specified costs of care measures.

Conclusions: In a randomized trial, we observed that some indicators of quality and efficiency of care in general adult primary care practices transitioning to PCMH status can be significantly, but modestly, improved over 2 years, although most indicators did not improve and there were no cost-savings compared with control practices. For the most part, quality and efficiency of care provided in unsupported control practices remained unchanged or worsened during the trial.

Figure 1.

Study timeline.

Figure 2.

Enrollment and retention. * Differences in the N between clinical quality and efficiency data sets at both the practice and provider level are due to one practice that did not submit required CPT-II data or did not have qualifying patients.