Background: The team of medical and rehabilitation professionals who are going to treat a person with CP must have: Knowledge of normal anatomy and physiology, particularly regarding ambulation. A good understanding of the functional pathology present in CP. Realistic goals/objectives for treatment that are shared commonly by the patient, family, and others concerned with the child's welfare. Knowledge and ability to carry out any of the treatments that are required. A facility with the resources to carry out the necessary evaluations/treatments. During the past two decades, correction of all fixed musculoskeletal deformities with single event multilevel surgery (SEMLS) has been the standard of care. SEMLS improves the likelihood of achieving sagittal plane balance and reduces the need for repeated anesthetics, reduces episodes of hospitalization (In the past Mercer Rang referred to surgery for CP as “birthday syndrome” as patients would undergo an operation every year of their life, spending the majority of their childhood in the hospital), and requires only one major period of rehabilitation. Goals depend on severity of disease, functional impairment, and level of ambulation (Gross Motor Function Classification System [GMFCS] Level) and the goals of person with CP, family, and the multidisciplinary team. In the first decade of life, the most important priority of persons with CP is function, in the second appearance and in the third and subsequent decades the avoidance of pain. SEMLS should be goal oriented and focus on the projected outcome and quality of life.