TRYING TO PAY MY DOCTOR: WHERE'S MY CLIENT ID?

So, I'm going to pay my medical bill, and it says click here I need a client ID. Here's the catch: I can't find it anywhere! Searched my emails. 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 really helpful. Logging in to Veradigm Pay My Doctor for Payment Issues Are you experienc