Abstract 13990: Tightly Connected Provider Networks Are Associated With Lower Spending for Patients Undergoing Left Ventricular Assist Device Implantation

Abstract

Introduction: Patients receiving a durable left ventricular assist device (LVAD) implant for advanced heart failure require multidisciplinary care but integration of care delivery may vary among provider groups. Prior studies found that greater provider network connectivity may be associated with more integrated care and better clinical outcomes. Hypothesis: Greater connectedness in provider networks is associated with lower LVAD payments. Methods: Drawing on social network theory, a measure of connectedness was developed based on the number of shared patients among providers (e.g. primary care physicians, cardiologists, surgeons) caring for 4,985 Medicare beneficiaries, starting 180 days prior to LVAD admission until 180 days post-discharge, from July 2009-April 2017. Connectedness was measured as average network path length, with shorter path lengths indicating more connected networks. Total payments were captured from admission to 180 days post-discharge. Multivariable regression was used to analyze the relationship between connectedness and LVAD payments. Results: The patient cohort was 81% male, 73% white, 11% Intermacs Profile 1 with a mean age of 63.1 years (SD 11.1). The median path length (IQR) for a provider network was 1.7 (1.6, 1.8) and median (IQR) payments from admission to 180 days post-discharge was $162,774 ($151,279, $202,932). Median (IQR) payments at the lower, middle, and upper terciles of connectedness were $162,249 ($150,543, $198,709), $162,577 ($151,424, $199,471), and $163,922 ($152,263, $212,072), respectively. After adjusting for center, patient demographics, and clinical factors, greater connectedness was associated with lower payments (β=-22097.88, p<0.01), Figure. Conclusions: Greater provider network connectedness is associated with lower payments for Medicare beneficiaries receiving durable LVAD implants. Interventions to improve network connectedness may improve the value of care in this population.