My doctor did not prescribe PT. Five months after 2-level ACDF, I was still stiff and had shoulder blade pain. I called the doctor and requested PT.
I have been going to PT for four weeks and feel much better! They get in there and manipulate all those sore spots, do e-stem and some ultrasound. I have a about a dozen exercises to do at home.
I totally recommend the PT, even if your surgeon doesn't seem to think you need it.