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

Okay, therefore, I need to pay my doctor's bill. I went the system and it says I need a client ID. But, I am missing that! What am I supposed to do? Is there a way to find my client ID? Help me figure this out. It's really frustrating having to halt payment because of this. Using Veradigm & Pay My Doctor Navigating medical bills can be a challen