title: Defining medical necessity.
authors.forename: L M
authors.initials: LM
authors.lastname: Hartz
mesh_terms: D006801:Humans; D007345:Insurance Claim Review; D019458:Insurance Coverage; D007348:Insurance, Health; D016365:Liability, Legal; D020380:Needs Assessment; D010817:Physician-Patient Relations; D014481:United States