A method for handling an Implantable Medical Device, IMD, transmission from an IMD provider such that the transmission comprises one or more alerts and/or IMB data attributes indicative for a status of the IMD or the patient. The alert comprises a provider specific alert priority. The method comprises the following steps: retrieving the IMD transmission from the IMD provider; and assigning to the one or more alerts a generic alert severity based on a predetermined mapping between the provider specific alert priority and the generic alert severity; and/or calculating an IMD data severity based on the IMD data attributes; and calculating a transmission severity based on the generic alert severity assigned to the one or more alerts and/or the IMD data severity.