To amend title XVIII of the Social Security Act to maintain the current distribution of outlier payments for inpatient hospital services between payments for day outliers and payments for cost outliers for 3 fiscal years, to limit the degree of variation in such distribution in succeeding fiscal years, and to maintain the current formula for determining the amount of a payment for day outliers.

Amends title XVIII (Medicare) of the Social Security Act to maintain the current distribution of additional payments (outlier payments) for inpatient hospital services between payments for extra lengthy stays and payments for extra costly stays for FY 1990 through 1993. Limits the degree of variation in such distribution to five percent for each succeeding fiscal year.

Sets forth the formula for determining outlier payments for extra lengthy hospital stays.