A device for managing health data provides a first housing portion including a data storage system that stores health data and a second housing portion including a data communications element. The data communications element provides data communications between the data storage system and a processing device that processes the health data according to a data-management software. The first housing portion and the second housing portion are connected by a cable that communicates signals between the data communications element and other components in the first housing portion. Another device for managing health data provides a first housing portion including a health data management system and a data communications element that provides data communications between the health data management system and an external processing device. The second housing portion is removably coupled to the first housing portion, and includes at least one component used by the health data management system.