Review of potential day outliers (short or unusually long length of hospital stay) to determine the necessity of admission and number of days before the day outlier threshold is reached, as well as the number of days beyond the threshold. The day outlier is no longer used. The peer review organization determined the certification of additional days. Under the Medicare program, this is known as the Quality Improvement Organization (QIO). Also see outlier.

Register for recording daily business transactions (charges, payments, adjustments). Also called daily log , accounts receivable (AR) journal , and daily accounts receivable journal .

Utilization measurement of the number of days of inpatient, outpatient, residential, or partial hospitalization used in a year per 1000 health plan members. The formula is calculated as the # of days/member months × 1000 members × # of months. Also called bed days per 1000 and visits per 1000 .