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

Okay, therefore, I need to cover my doctor's bill. I visited the system and it says I need a client ID. But, I am missing that! What am I supposed to try? Is there a way to find my client ID? Help me figure this out. It's really annoying having to halt payment because of this. Veradigm & Pay My Doctor: A Guide Navigating healthcare expenses can