Billing questions

I had a few billing questions and wanted to make sure which one is correct

1. For discograms in addition to 66290 and 66291 is anyone billing for radiologic interpretation codes. If so what is required and if not who bills for it(is it the radiologist after CT scan?)

2. for SI joint inj are you billing 27076. are there additional codes like SI joint arthrography and 76005 with that

3. For Epidural lysis of adhesions due you usually do an epidurogram initially and then do the lysis in the same visit? wht codes do you use

If there is any additional info on these I would love to see it as well

Thanks