Definition:
Level of functioning is something that is assessed by a practitioner regarding a client in order to determine a proper levels of care. It is an evaluative finding intended to reflect how effectively an individual is able to perform in various personal, interpersonal, and community domains.
Prior to The Diagnostic and Statistical Manual of Mental Health Disorders, Fifth Edition (DSM-V) it was measured using Global Assessment of Functioning Scale (GAF). Currently, it is measured using the World Health Organization Disability Assessment Schedule (WHODAS).