Functional movement disorder is a neuropsychiatric condition that sits at the intersection of neurology and psychiatry. Neurology and psychiatry are unique in the fields of medicine as they represent two distinct specialties for the same organ system. Notably, several early leaders across both fields regarded themselves as “neuropsychiatrists” adopting a viewpoint that saw traditionally conceptualized neurological and psychiatric conditions as part of the same brain-based diagnostic classification system. In the century that has followed, the separation of physical health from mental health has contributed to the stigma associated with psychiatric conditions and a lack of integrated care that has particularly not served well patients with functional movement disorder. In this chapter, we call for going “back to the future” with modifications to embrace an integrated neuropsychiatric perspective based in the biopsychosocial model and the importance of individual differences. The relevance of neurological and psychiatric factors varies patient-to-patient, underscoring that one size does not fit all in the framing of functional movement disorder.