In the Inpatient Prospective Payment System (IPPS), what is an outlier payment?

• A. An additional payment to cover unusually costly cases that exceed a high-cost threshold beyond the DRG payment.
• B. A bonus for hospitals achieving efficiency.
• C. A fixed payment per discharge.
• D. A payment adjustment based on patient satisfaction.

Answer: (A)

Outlier payments are extra reimbursements to cover inpatient stays that turn out to be unusually costly compared with the fixed DRG payment. In IPPS, hospitals receive a predetermined amount for each admission based on the DRG. If the actual costs exceed this DRG payment by crossing a high-cost threshold, an outlier payment is added to cover the excess costs, typically equal to the difference between costs and the DRG payment up to a cap. This mechanism protects hospitals from large losses on expensive cases while keeping the DRG-based payment structure intact. Therefore, the description of an outlier payment as an additional payment for unusually costly cases exceeding a high-cost threshold beyond the DRG payment is correct. The other options describe efficiency bonuses, a fixed per-discharge payment, or adjustments based on patient satisfaction, which are not outlier payments.