This can vary tremendously depending on the circumstance.  For example, it can depend on whether the surgery was covered by insurance or completely cosmetic with money out-of-pocket.  It also depends on why the patient is dissatisfied.  With cosmetic procedures, surgeons will often not charge for any revisions necessary to repair or correct a complication.  However, the patient may incur additional facility or anesthesia fees.  These issues are dealt with on a case by case basis but we usually try to accommodate our patients to the best of our ability.