Referral network of health care provider

I need listing the referral network of health care provider, but I don’t know what is the rigth resource in FHIR R4. I’m thinking to use PractionnerRole but I’m not certain if this is way. Can you give a option about it?

Look at the Da Vinci Payer Network IG:

Even if you’re not U.S.-based, the architecture and resource choices should be relevant anywhere.

Thanks! I will read and if I have some question ask again here.