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

So, I'm going to pay my doctor's fees, and it says I need a client ID. Here's the catch: I can't find it anywhere! Searched the paperwork. Did my doctor's office send it to me? Do they have a online system? Any ideas on how to this client ID would be greatly appreciated. Accessing Veradigm Pay My Doctor with Payment Problems Are you running in