These doctors hold a wide variety of specialties -- anesthesiology, neurology, orthopaedics, sports medicine, and others -- but all have advanced training
in the spine and interventional pain management
treatments. See this page for more info:
There are excellent surgeons who also have this training. Dr. Wm. Dillin in Southern California is a good example. Dr. Dillin is a trained surgeon, but also has trining in interventional techniques.