spinal fusion

I have severe degenerative disc disease at L4-L5 and L5 - S1.  All conservative treatments have failed.  I had a minidiscectomy about 10 years ago for herniated discs in those locations which was successful.  I have had S1 radiculopathy for the past 2 and 1/2 years.  The neurosurgeon recommends spinal fusions at both levels.  After questioning him re MIS, he didn't think i was a candidate as it involved 2 discs and i had a previous surgery.  I am going to an orthopedic surgeon soon for a second opinion.  How does one decide to use a neurosurgeon or an orthopedic surgeon for this procedure, and is it the right option.  I am not a smoker, nor overweight.

[opus88]

sorry for the pain and failed attempts..that is most frustrating for all of us to hear!
I suffer from similar pain and haven't attempted any surgery thus far, I survive on pain meds.
In my own opinion if I were to attempt surgery on such a sensitive area as the spine I would have it done by a neurosurgeon who specializes in the nervous system and not only the bones...
good luck