Butt implant shifting or rupture
According to the American Society of Aesthetic Plastic Surgery (ASAPS), in 2007 the average cost of Butt implants surgery/butt augmentation was $4,250. That price reflects physician/surgeon fees only and does not cover the costs of other aspects of surgery such as surgical suite, location (city and state) where the procedure is being performed, anesthesia, doctor popularity, and so on.
Usually, insurance companies do not cover the plastic surgery procedures. Since buttock enhancement is an aesthetic procedure, you probably won't receive reimbursement for your surgical fees.