Luckily, the representative that I talked to on the phone seemed knowledgeable.
Even more luckily, Stanford Hospital is in network, which means for my hospital stay my co-pay is only 10%, and there's no daily maximum. If it were out of network, it'd be 30%, with the daily allowable amount of total charges capping out at $600.
Not so lucky? These numbers:
Procedure Surgeon's Quote Blue Shield's Allowable Amount (they pay 70% of these)
Maxillary Osteotomy $16,800 $1,636 (not even 10%!)
Mandibular Osteotomy $16,800 $1,784
Blue Shield says I'm responsible for the difference, because my surgeon is out of network. Whoa.
Why don't they just go by their initials - BS.