Although mental health professionals embrace broad assessment protocols, which attempt to incorporate biopsychosocial, and, more recently, the cultural and spiritual identities of the individual, attention is rarely given to the individual's unique internal and external sources of strength and support. The limitations of traditional medical model diagnosis, particularly in the form of the Diagnostic and Statistical Manual of Mental Disorders classification system, have been noted by many researchers and practitioners. At the same time, research has focused on predictive factors in treatment outcome, both in terms of client characteristics and in the utility of evidence-based treatment protocols applied to specific mental disorders. The cumulative themes in contemporary discussions of diagnostic systems and effective treatments, logically related to diagnosis, suggest the need for an additional core component of the diagnostic system, for which the authors advocate the Intersectionality/Resiliency Formulation.