title: Defining 'medically necessary'.
mesh_terms: D000328:Adult; D000342:Affective Symptoms / Q000175:diagnosis / Q000628:therapy*; D002648:Child; D006301:Health Services Needs and Demand / Q000331:legislation & jurisprudence; D006801:Humans; D019458:Insurance Coverage / Q000331:legislation & jurisprudence*; D007358:Insurance, Psychiatric / Q000331:legislation & jurisprudence*; D008329:Managed Care Programs / Q000331:legislation & jurisprudence*; D001523:Mental Disorders / Q000175:diagnosis / Q000628:therapy*; D014481:United States