No. As the policy holder it is your personal choice of where to receive your physical therapy services. Your physician may have recommendations for you, and you should consider those options as well, but in the end, it is your choice to seek treatment from any physical therapist that you see fit.
As always, make sure you are comfortable with who is providing your healthcare as you have many options in the Omaha area. Make sure you have the best fit for you and your needs.