Originally, IFA provides PZN numbers for medicines sold in German pharmacies. However, their PZNs can be converted into PPNs (Pharmacy Product Numbers) which are internationally recognized and serve as UDI-DIs for medical devices. If you want to sell your medical devices in German pharmacies, you have the advantage that you already have the PZN for that if you got your UDI from IFA.
By the way, we’ve recorded a step-by-step walkthrough video of how to get a MDR UDI from IFA, so take a look:

And we also have an MDR UDI overview article which might be interesting for you.
The PPN is essentially the PZN (Pharmazentralnummer) with a preceding “11” and an appended check character pair. Using the IFA coding system also allows you to generate a “BUDI”, as they call their Basic UDI-DI numbers, and a “HPC” (Health Product Code). The HPC can be used as a UDI-DI if the product will not be made available on the German pharmacy market. HPCs are assigned by the manufacturers themselves.