A handheld medical device that arbitrates priority among multiple communication modules (502; 504) having separate antennas (514; 516; 517) for communicating with a plurality of medical devices, the handheld medical device comprising: a first communication module that is arranged to selectively communicate in a first frequency band with an first device external to the handheld medical device via a first antenna using a first wireless communication protocol, wherein the first device is adapted to administer a substance to a patient by communicating with the handheld medical device via the first communication module; a second communication module that is arranged to selectively communicate in the first frequency band with a second device external to the handheld medical device using a second wireless communication protocol, wherein the second device is adapted to monitor a health parameter of the patient by communicating with the handheld medical device via the second communication module; an arbitration module that is adapted to selectively grant permission to communicate to the first communication module and to deny permission to communicate to the second communication module and that is adapted to alternatively selectively deny permission to communicate to the first communication module and to grant permission to communicate to the second communication module; and a blood glucose measuring module that is arranged to selectively measure blood glucose in a blood sample; a power management module that is arranged to deactivate the first and second communication modules when the blood glucose measuring module measures the blood glucose in the blood sample; and a radio frequency RF sensing module that is arranged to selectively sense RF signals; and a processing module that is arranged to deactivate the blood glucose measuring module when the RF sensing module senses the RF signals proximate to the handheld medical device. a first communication module that is arranged to selectively communicate in a first frequency band with an first device external to the handheld medical device via a first antenna using a first wireless communication protocol, wherein the first device is adapted to administer a substance to a patient by communicating with the handheld medical device via the first communication module; a second communication module that is arranged to selectively communicate in the first frequency band with a second device external to the handheld medical device using a second wireless communication protocol, wherein the second device is adapted to monitor a health parameter of the patient by communicating with the handheld medical device via the second communication module; an arbitration module that is adapted to selectively grant permission to communicate to the first communication module and to deny permission to communicate to the second communication module and that is adapted to alternatively selectively deny permission to communicate to the first communication module and to grant permission to communicate to the second communication module; and a blood glucose measuring module that is arranged to selectively measure blood glucose in a blood sample; a power management module that is arranged to deactivate the first and second communication modules when the blood glucose measuring module measures the blood glucose in the blood sample; and a radio frequency RF sensing module that is arranged to selectively sense RF signals; and a processing module that is arranged to deactivate the blood glucose measuring module when the RF sensing module senses the RF signals proximate to the handheld medical device.