DEFINITION: Also called pre-certification review, or pre-admission review. Approval by a case manager or insurance company representative (usually a nurse) for a person to be admitted to a hospital or in-patient facility, granted prior to the admittance. Pre-admission certification often must be obtained by the individual. Sometimes, however, physicians will contact the appropriate individual. The goal of pre-admission certification is to ensure that individuals are not exposed to inappropriate health care services (services that are medically unnecessary).