You're very kind, Angus ... but I'm really just pleased that you haven't asked about EUDAMED (or even, EDMA).
That's the thing about codes ... like ideas, they're everywhere; you just need to choose the one most suited to your needs.
On that tack, perhaps if you offered a clue or two about what it is you're trying to achieve, then maybe I (and/or others) may be able to assist you further!
But bear in mind that "GMDN, the de facto
global standard for identifying the world’s millions of medical devices, has been made freely available to all users for the first time on 1st April 2019" (see the GMDN Agency
website) ... and that the MHRA recommends its use!