A decade ago, medical devices were largely simple standalone entities. Today, wireless networking capabilities, sophisticated data processing, and new sensors and actuators are increasingly being incorporated into mobile medical devices that promise to improve a clinician’s ability to diagnose and treat a range of acute and chronic medical conditions. This new generation of mobile medical device systems (MMDS) faces a variety of challenges. Such devices are often implanted, ingested, or worn and deployed as a part of pervasive health monitoring system. Some interact directly with a patient’s biological systems in order to provide coordinated, closed--‐loop care. In order for these mobile medical cyber--‐physical systems to be successful, one needs to develop targeted platforms and technologies. This is particularly challenging because of the devices used in MMDS have to be small and unobtrusive. This makes them severely resource constrained in nature. Architectures developed for the desktop and hand--‐held computing world ill suited for such applications. Further, as people who have limited understanding of the underlying technologies will use such devices, the usability of such systems, from user--‐interface to sustainability to interoperability with other devices to configuration, is very important. These challenges have been recognized, in the abstract, in the community for some time. However, there has not been a dedicated forum for discussing ideas on building mobile medical devices. This proposed workshop will bring together researchers from academia and industry to address challenges facing the design and implementation of mobile medical device platforms.