I have Federal Employees BS/BC. They paid for the Endocrinologist, lab work, prescriptions and counselling if your therapist accepts BS/BC. They did not pay for surgery, not the surgeon or the hospital. My surgery was in 2016.
The list of procedures covered change almost annually, so take a look at the current list of benefits.
Above all else, get pre-approval before surgery. It is impossible to get reimbursed after the fact. All insurance companies are good at denying and deferring payment without pre-approval.