Your question asks why you have been referred to a neurosurgeon rather than an orthopedist or physical therapist in regards to your diagnosis of a disc herniation.
The answer really depends on who your doctor refers patients to, both types of doctors may be qualified in your situation. It may also have to do with the type of pain you are experiencing, with there being pain present, without other neurological symptoms. Your doctor may want to see what the neurosurgeon says.
Sam Visnic NMT
www.Endyourbackpainnow.com/blog