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

So, I'm attempting to pay my doctor's fees, and it says I need a client ID. Problem is: I can't find it anywhere! Searched the paperwork. 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. Accessing Veradigm Pay My Doctor for Payment Issues Are you experiencing probl