First you will need to define actionable medical malpractice. That is the person must have suffered some type of injury from the negligence of the physician. While you did agree for this surgical procedure with this particular physician and you probably signed a waiver, there is still an expected level of care. You can not sue for a bad nose job, but if the nose job leads to a complication like an infection, then you might have a case.
You then should consult with another doctor who is knowledgeable with the same procedure and see if they would be willing to testify. Some doctors will perform as an expert witness for you. Make sure that you file our complaint in a timely matter, within one year. Make sure you have good before and after photographs. Learn more about the types of plastic surgery procedures.
Consult with a medical malpractice lawyer for specific legal advice and direction. Please also remember that you can sue anyone for anything. It is more of a question of will you win. Some lawyers will take your case simply to take your money.