Spine specialist diagnosed me without examining me?

Not sure if this is common practice? But went to a spine specialist after over a year of lower back pain and described all my symptoms. The doctor without examining me or looking at my MRI told me I have a disc bulge and need to get an epidural steroid shot in my back for the pain. I was kinda off out that he just "knew" what was wrong. I know he has probably seen this a thousand times and maybe does know? But the fact that he didn't examine me or anything seemed kinda strange to me. Your thoughts?