Hey Scott, I had an open laminectomy/discetomy L5-S1 about 3 years ago. Looks like we are in the same boat. I saw a spine specialist and he said that I should get an MRI every 6 months since my surgery. Of course, I am not going to do that but I think you better get one done because post operative changes do occur. I think it is definitely worth asking. Hope you get to feeling better.