Is it possible for me to get the scoliosis surgery at 20?

Yes. Scoliosis surgery is possible at age 20. If your curve is greater than 50 degrees, surgery is often offered. Scoliosis curves greater than 50 degrees will progress at 1 degree a year. Curves greater than 90-100 degrees can impact respiration. That being said, the risks are not insignificant, and the surgery is completely elective.