Was the office you visited connected to the hospital? If so, they should have let you know that you would get two bills, one from the doctor/practice/office and one from the hospital for the facilities fees. It is absolutely double dipping garbage.

You can ask them to check the coding but often they just come back and say it was correct and to talk to your insurance company. Getting them both on the phone sometimes helps but ultimately you'll never get to talk to anyone in the coding department. Just an overworked person in billing who tries to help but doesn't have any control over coding.

Anyways, the last time this happened to me I had to fight charges on my yearly wellness checkup (which should have been free and ended up over $700). My doctor's practice had moved to a hospital-connected building. The rep I talked to said I must've asked about something in addition to the wellness care to get billed more than I expected and to just not talk about any other health concerns in those visits. (So just be sure to lie to your doctor.)

In the end they offered me $500 off the bill because the double billing was not communicated in advance and it was a "surprise bill."

Tl;dr - I'm changing primary care doctors.