NEED TO SETTLE MY DOCTOR: WHERE'S MY CLIENT ID?

So, I'm going to read more pay my doctor's fees, and it says I need a client ID. The thing is: I can't find it anywhere! Searched my emails. Did my doctor's office send it to me? Do they have a separate portal? Any ideas on how to this client ID would be really helpful. Logging in to Veradigm Pay My Doctor with Payment Complications Are you ex