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

Okay, right, I need to pay my doctor's invoice. I went the portal and it says I need a patient code. Unfortunately, I don't have that! What am I supposed to check? Is there a way to retrieve my client ID? Can someone figure this out. It's really annoying having to halt payment because of this. Using Veradigm & Pay My Doctor Navigating medical bi