This is what i was told by my doctors office.
Any out of pocket costs would be limited to your copay, deductible and coinsurance amounts, along with any annual out of pocket maximum limitations that may apply, as dictated by your plan. Attached is the benefit summary for Federal BCBS. General benefit information begins on page 31 and benefits for surgery begins on page 53.
Federal BCBS Benefit Plan Information: http://www.fepblue.org/benefitplans/2012-sbp/bcbs-2012-RI71-005.pdf