This report from The Commonwealth Fund examines the Montefiore Medical Center as a case study for integrated medical care. This organization, serving primarily low-income Medicare and and Medicaid patients, is financially and organizationally sustainable.

From the report: 

Montefiore Medical Center, an academic medical center in New York City, has created an integrated system of care for its primarily low-income patients. This patient-centered system of hospitals, community clinics, and school-based clinics uses innovative practices for managing chronic disease, provides access to high-quality specialty hospital care, and employs targeted care management and robust health information technology in support of integrated care. Although close to 80 percent of its payer mix is Medicaid and Medicare, Montefiore has been able to achieve financial and organizational sustainability. Factors that contribute to this success include: care management that allows for integration across the system; building successful primary care that combines traditional and new models; and medical systems that focus on population health and community accountability.

Full Report: Montefiore Medical Center: Integrated Care Delivery for Vulnerable Populations (PDF | 874 KB) 

Commonwealth Fund. (2010). Montefiore Medical Center: integrated care delivery for vulnerable populations. Chase, D.