How does a DRG weight influence Medicare payments?

• A. By applying a DRG weight to a base rate after adjustment factors.
• B. By adding a fixed bonus to all DRGs.
• C. By averaging charges across all DRGs.
• D. By using patient age as the sole determinant.

Answer: (A)

In Medicare’s inpatient prospective payment system, each hospital stay is grouped into a DRG with a relative weight that reflects the expected resource use for that group. The payment isn’t a fixed amount or based on charges; it’s the DRG weight multiplied by a base payment amount, with geographic and other adjustments applied first. The base rate is adjusted for factors like wage levels in the area and teaching or disproportionate-share status, and then the DRG weight scales that adjusted base rate to reflect how resource-intensive the stay is. So higher-weight DRGs, which represent more complex or costly care, receive higher payments; lower-weight DRGs receive lower payments. Age isn’t used as the sole determinant.