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

Okay, right, I need to pay my doctor's statement. I went the system and it says I need a client ID. Unfortunately, I am missing that! here What am I supposed to check? Is there a way to find my client ID? Please figure this out. It's really frustrating having to halt payment because of this. Veradigm & Pay My Doctor: A Guide Navigating healthcar