What all does blue cross blue shield cover?
It really depends on your policy type (HMO or PPO, or EPO) and then of course the monthly payment, etc.
Note that in California, BCBS (blue cross blue shield) was listed in one report I read as the number one insurance company that denied payment on medical issues that were actually covered by their paperwork and contracts.
Basically, they try to convince you it's NOT covered, thereby escaping liability and saving money...pretty much a scam, imho. However, it also depends on the plan you get and they could be better now.