This study evaluated the functional improvement of 189 patients with traumatic brain injury (TBI) who participated in a comprehensive rehabilitation program at a National Institute on Disability and Rehabilitation Research--designated Center for traumatic brain injury rehabilitation. Data were comprised of functional ratings reported by therapists in nine disciplines. Improvement in mobility, self-care, communicative, family, nursing, psychological, and recreation functions were observed. The relationship between functional level and length of stay, onset-admission interval, age, sex, education, and work history were examined. The benefits of rehabilitation are supported by this multidimensional study.