Mariétou H. Ouayogodé, PhD

Accountable care organization (ACO) participation was associated with an increase in hospitals’ mean market share and with additional market share gains in more concentrated markets.

A higher percentage of accountable care organization (ACO) primary care providers was associated with physician leadership, upside financial risk, and financial compensation of physicians tied to performance measures.

Hospital care transition activity facilitates uptake of Medicare-reimbursed transitional care management, which is associated with lower spending and better patient outcomes.

This article compares clinical and utilization profiles of Medicare patients who are attributed to provider groups with those of patients unattributed to any provider group in accountable care organization models.