A medical device programmer comprises a medical device module and a computer module. The medical device module comprises a telemetry module that wirelessly communicates with an implantable medical device (IMD) and a medical device module processor communicates with the IMD via the telemetry module. The computer module housing mates with the medical device module housing to form a congruent external surface of the programmer. The computer module comprises a user interface including a touchscreen that displays data received from the IMD and receives input from a user, a memory that stores selectable patient therapy parameters for the IMD, a computer module interface in electrical communication with the medical device module interface, and a computer module processor that communicates with the medical device module. The medical device module processor forwards communications between the computer module processor and the IMD via the medical device module interface and the telemetry module.