Hi, I am new to this forum but unfortunately not to neck, back problems.

This question is about my 24 year old son. He had been having significant lower back pain for about 5 months. Three months ago, he had an MRI which showed that he has a ruptured disc with impingment of the sciatica nerve at L-5.
We had started out seeing a general ortho who referred my son to a pain management doctor. So far my son has had two epidurals and is having PT and traction 3x a week. He had pain relief for about two weeks following the first epidural but after two weeks, the pain/sciatica started to return. He had his second epidural last week and has found that there is relief but he is still experiencing intermittent pain. The pain management doctor's plan is for three epidurals three weeks apart. Does this plan sound right? Should he see a spinal surgeon for an opinion sooner or wait a few more weeks? If we are facing surgery, would a spinal ortho or neurosurgeon be best or does it not matter?