I'm having surgery for endometriosis and I want to have a Breast Augmentation the same day. Is it possible? (photo)

Best to check with the GYN surgeon if he/she OK with combo surgeries and the PS you desire.. There could be issues that would not be in your awareness... 

Cosmetic surgery can be done along with other surgeries.  However they are not covered by insurances and have to be paid separately. 

This combination may be acceptable but you should check with both of your surgeons to be sure.  If you have unexpected findings during the surgery for endometriosis then the elective breast augmentation may have to be postponed. 

Provided there are no surprises during the gyn procedure, it seems reasonable to do both procedures during a single anesthesia.It is quite unlikely to expect that the anesthesia and OR fees would be paid by your insurer. I would expect to have to pay these separately.Best wishes.