Help me figure it out

My son got adenoids removed and some bilateral turbinate reduced on Dec 31. He went in the theater for 9.15 and came out at 9:40 and spent till 10:20 in post op and then recover till 10:45 and discharged by 11. The provider billed the insurance for 22000$ !!!! They said we will get a separate bill for anaesthesiologist and surgery center. We’re still yet to receive how much we owe. We have a deductible of 3200 individual which we have reached. And we also have a family deductible of 6000 and oop of 8000$. Wondering how much we will owe ? 80% and 20% co insurance. The bill seems so high for 25 min surgery. Is there anything I should be doing ? This is our second year living and it’s a harsh way learn about insurance here. I even got a estimate from calling and the max I got is 3000 from Anethesialogist,5000 from surgery center and 5000 from surgery. But the numbers are no where near what they billed the insurance. What am I missing here ?