I went through the same thing last summer. I'm not 50, and I have family history of colon cancer (dad), so insurance won't cover a colonoscopy without reaching a deductible (family history makes the colonoscopy go from one code to another.... )
I spent FOUR DAYS calling the hospital, the doctor's office, the anesthesiologist, the this, the that, the who. They would tell me someone else was involved, I'd call their office.
I was told so much different information as far as costs, etc., that I think every entity involved was so confused and really didn't know WHAT TO DO with how they were going to bill ME....
I paid about $435 in lab fees (they pulled 3 pollups) and some other fee ( surgeon? ), never saw a bill or EOB from any other entity. Unreal. All I was trying to do for those 4 days was figure out how much it was going to cost me, since all of it was going to be out of pocket. I did get figures from some entities, but it was a complete cluster and it took 4 days?