title: Accountable care organizations and clinical commissioning groups face an uncertain challenge for improving public health.
abstract: Accountable Care Organizations (ACOs) in the United States of America (USA) and Clinical Commissioning Groups (CCGs) in the United Kingdom (UK) are newly proposed cross-organisational structures in health services both tasked with a role which includes improving public health. Although there are very significant differences between the UK and USA health systems, there appears to be some similar confusion as to how ACOs and CCGs will regard and address public or population health. This short perspective article gives an overview of ACOs in the USA and CCGs in the UK, with the underlying context of possible public health functions. It concludes by considering the challenges facing both countries and highlighting the opportunity for shared learning.
  
  
  BACKGROUND
  this article was based on a research proposal prepared for the Commonwealth Fund's Harkness Fellowship in Health Care Policy and Practice 2012/2013.
authors.affiliation: Clinical Lecturer, Centre for Primary Care and Public Health, Barts and The London School of Medicine and Dentistry , London, UK.
authors.forename: Douglas J
authors.initials: DJ
authors.lastname: Noble
keywords: Accountable Care Organizations; Clinical Commissioning Groups; population health; public health