While conventional in-clinic Traumatic Brain Injury (TBI) rehabilitation serves the needs of the vast majority of patients many of whom go on to resume their lives a significant percentage of patients continue to have enduring cognitive disabilities despite long-term and skilled therapy. However, these patients can rapidly achieve gains which typically continue to increase toward substantial self-sufficiency when engaged in Collaboration Therapy (CT). CT is directed toward patient populations appropriate for a telehealth service who meet the following criteria: 1) patients have plateaued in conventional in-clinic therapy; 2) in-patients are too distant from an appropriate outpatient facility; and 3) individuals with TBI/ABI (acquired brain injury) are in unserved or underserved geographical areas. CT telehealth service is also valuable for High Achieving individuals – by occupational, avocational or educational achievement – who will often have difficulty with conventional rehabilitation. This paper describes CT, telehealth and presents seven case studies that provide context and detail to the CT model and outcomes