I read up about Kessler. They do not have much of a program to diagnose and treat milder injuries like mTBI/concussion. The therapies they use are oriented toward those who have been comatose and need rehab of their brain. This is very different than an mTBI/concussion.

What therapy are you wanting? Speech therapy is often used for memory issues but much of it is learning compensation strategies, not repairing the damaged memory functions.