I'm 17 years old. Do I need parental consent to get liposuction?

You definitely would need permission from you parents before undergoing liposuction. Best of luck to be seen for consultation.

Good question.  In general, unless you are 18, yes you do need a parental consent.  Also, I would warn you that your body is still maturing and that you may have a different body at 20 than at 17.  That said, there are some familial tendencies that not even time is going to improve, and I have, on occasion, with parental consent, performed liposuction on a 17 year old.  A good example would be several generations of fatty chest/gynecomastia where we know by family history that that patient is not going to improve there body area, no matter how much the mature or how old they get.  These cases are the exceptions, though.