Abstract: A game display for use with a diagnostic device, such as a blood glucose measuring device, that includes a grid which defines a plurality of spaces. In use, a sample of body fluid, such as blood, is obtained and the device determines a diagnostic concentration in the sample. Once the diagnostic concentration is determined, one of the spaces displays an indicia associated with the result of the diagnostic test and a character associated with the successful completion of the diagnostic test. The display also includes a score area which displays another indicia relating to the level of success of a patient's diagnostic testing regimen.