A method for the assembling of a hand-held device with which a skin can be pierced wherein, with the method, a drive module with a drive unit which is configured for the purpose of producing a driving force, is arranged with a needle module in which a piercing apparatus is moveably arranged in the longitudinal direction of the needle module, is detachably coupled so that the driving force can be routed into the piercing apparatus, and identification means can be evaluated by an evaluation apparatus allocated to the identification means and arranged in the drive module.