A communication interface apparatus is provided for use with a handheld medical test device. The communication interface apparatus is comprised of an attachment member configured to detachably couple to a housing of the medical test device, where the attachment member substantially overlays a rear side of the medical test device. The communication interface apparatus houses an infrared receiver, a secondary transceiver and a controller. The infrared receiver is arranged such that its input port aligns with an output port of an infrared transmitter in the medical test device when the attachment member is coupled to the medical test device.