Hi Still Totally ADD !
My son had surgery in May 2012 because of a congenitally narrow lumbar spinal canal. The surgery in his case has proved to be a success (no more bent walking, no more heavy pains, etc.).
Anyway to decide to undergo surgery or not is a personal decision, not the one of an insurance company.
Take care because health is one of our greatest asset, as great as being able to live free from any form of cult manipulation..