Delta Dental PPO dentist suddenly charging $800+
I went for a root canal with an in-network dentist under Delta Dental PPO. During my first visit, the front desk verbally told me my total costs would be around $250–300.
I started the procedure there, but after the second visit I had to move to another state. I completed the root canal with a different provider, where I paid about $250 total. At this stage, I called my previous provider about this that I am having pain and need to go to visit a local provider here as I do not plan to visit the other state in near future. Also from my first two visit experience I was not satisfied with the service. They were insisting me to come back.
Now the first provider has sent me a bill/settlement notice for $800+. When I checked the EOB from Delta Dental, I noticed they billed using a random code (D3999) which has most of the charges.
I called the Dentist office multiple times and tried to dispute it, but they keep insisting I have to pay.
This amount is huge for me. What are my options here? Any advice would be appreciated.
EDIT: I had plenty of unused maximum this is last year
They tried to charge D3330 first which I questioned and then they charged me on D3999. Looks like my insurance didn't pay anything for these codes.
EDIT2: I am happy to pay Dentist 1, max for root cancal on cost estimate shows me 180USD and they said it will be around 250-300 USD max. I am not asking to not to pay Dentist 1 but rather to pay what it should have been not $$$
EDIT3: My insurance paid over $800 to them already, this $800+ which I owe is extra. I see a lot of comments on Dentist 1 should be paid, and they have paid, but they want more looks like.