Although created already under the Law on statutory health insurance reform 2000, implementation and actual practice of the instrument of "integrated health care" (section 140 a-g of the German Social Code, Book V) have noticeably been gaining momentum only since the Law on statutory health insurance modernization (GMG) came into force on January 1, 2004. In this process, the issue of coping with the interface between medical acute care and medical rehabilitation emerges as an increasing focus of the debate over future-oriented development of service provision structures. When Book IX of the German Social Code -- Rehabilitation and Participation of People with Disabilities -- came into force on July 1, 2001 its stipulations became binding also for the Statutory Health Insurance domain (Book V of the German Social Code), notably in as far as regulations of healthcare infrastructure, contents of benefits and services as well as their performance are concerned. Moreover, more than 75 % of the medical rehabilitation benefits granted are performed by rehabilitation providers outside the scope of the health insurance system. This contribution points out that the development of integrated care structures which also cover medical rehabilitation benefits and services is subject to interdisciplinary and multidisciplinary requirements that, partly to a considerable extent, differ from or go beyond the framework conditions usually applicable in the acute-care sector.