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Figure 2 National average base payments by Medicare for diagnosis-related groups (DRGs) 516 and 517 (bare-metal stents) and DRGs 526 and 527 (drug-eluting stents) in fiscal year 2003. The base payment is $200 more for DRG 516 and $450 more for DRG 517 than that in fiscal year 2002. AMI = acute myocardial infarction.