FRUSTRATED PAY MY DOCTOR: WHERE'S MY CLIENT ID?

Okay, right, I need to settle my doctor's statement. I logged in the website and it says I need a client ID. However, I can't that! What am I supposed to try? Is there a way to retrieve my client ID? Please figure this out. It's really bothering having to pause payment because of this. Veradigm & Pay My Doctor: A Guide Navigating medical bills c