Example of a device with 3 alternative charge item codes, depending on the associated implant monitored by the device. Cardiac pulse generator reader, homeuse 023456789123 46 Use context 1: with single-chamber implantable defibrillator Use context 2: with dual-chamber implantable defibrillator 3492564 3499780 Use context 3: with cardiac resynchronization therapy implantable 3456628 defibrillator Codes from a French nomenclature, similar to CPT 4 in US, but also providing codes for devices.