USA - boobjobs for minors - parental consent?

Does a girl under 18 need parental consent to get a boobjob? Breast reduction surgery, to be specific.
Any difference if paid by insurance or cash over the counter?
Differences between States?
In other words - can a16-17 year old girl walk into a clinic, say - "make my boobies smaller" - flash some green and get the job done and go home with a surprise for her parents?