The North West London Integrated Care Pilot (ICP) was launched in June 2011 and brings together more than 100 general practices, 2 acute care trusts, 5 primary care trusts, 2 mental health care trusts, 3 community health trusts, 5 local authorities, and 2 voluntary sector organizations (Age UK and Diabetes UK) to improve the coordination of care for a pilot population of 550 000 people. Specifically, the ICP serves people older than 75 years and those with diabetes. Although still in the early stages of implementation, the ICP has already received national awards for its innovations in design and delivery. This article critically describes the ICP objectives, facilitating processes, and planned impact as well as the organizational and financial challenges that policy makers are facing in the implementation of the pilot program.