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

So, I'm going to pay my statement, and it says I need a client ID. The thing is: I can't find it anywhere! I've looked in the paperwork. Did my doctor's office send it to me? Is there a separate portal? Any suggestions about getting this client ID would be really helpful. Accessing Veradigm Pay My Doctor with Payment Issues Are you running int