If the laser spine surgery is determined by a doctor to be medically needed due to causing you severe pain from the spine problems hurting you and it makes it hard for you to do any work or move around then yes Medicare and any other health insurance should cover the cost of the laser spine surgery.
Laser Spine surgery is expensive out of pocket so yes you should ask your doctor to see if you can get Medicare to pay for the laser spine surgery if the doctor can sign up that you need the laser spine surgery performed.
If you have to pay out of pocket for laser spine surgery it can cost you $90,000.00 to $150,000.00 which is expensive.