Yes, so when kid #1 was born, the hospital billed me $3000 (for an $8400 birth). I asked them to send me a detailed breakdown of the costs. I then pulled out my EOB.
None of the numbers or codes added up. Even worse, there wasn't a single combination of any charges that added up to anything on the EOB.
So. I called the hospital, and said "I'm looking at my EOB, and I'm looking at the bill, and the numbers don't add up." Hospital says "let us take care of that, we'll get back to you".
-Magic happens-
(I assume re-coding?)
new bill $700 (2x the deductible, one per person)
Fast forward 8 years later, I have a second kid, and he needs surgery at 9 months old. We go to the pediatrician, get the referral to the specialist. Specialist doesn't do surgeries on infants anymore, refers us to UCLA. We get that through and get the official pre-approval from insurance. Yay!
Surgery happens. First EOB? "We are denying coverage because it was not an emergency surgery." No shit. That's why we got pre-approval.
I don't mean to scare you, but it required many phone calls to UCLA, our home doctors, and the insurance company. It eventually got fully paid, 18 months after the surgery. Yes, 18 months (my HMO plan states that outpatient surgery costs to me are $125).
Rant:
I think that hospitals and insurance companies just fucking suck. Insurance companies deny right out of the gate, just to see how many people are dumb enough to pay it. Hospitals are not quite as bad, but rather than call the insurance company when they didn't cover what they should have, they just billed me for $3k anyway.
Luckily, even sleep deprived we aren't stupid.
You need to contact, HR, the hospital, and the insurance company, not necessarily in that order.