I recently received/received last week/got a bill from my doctor and now I need to settle up/make a payment/pay it off. The problem is, I can't locate/find/figure out my client ID. Where do I look for it/get it/find that number? I've checked my email/gone through my records/scoured the internet, but no luck! Can someone please help me/point me in t

I'm struggling to pay my doctor's bill online, but the system keeps demanding for a client ID. The problem is, I have absolutely zip clue what that even refers to. I've looked my statements and emails, but there's nada about a client ID. This whole process is incredibly frustrating! Perhaps that I need to call their office and inquire for this ID