Coders should already be familiar with the 285 new, revised, and deleted ICD-9-CM codes that CMS finalized for fiscal year (FY) 2012. However, it’s critical that providers also examine how these changes directly affect MS-DRG assignment. Robert Gold, MD, examines a number of these changes, including MS-DRG assignment related to cardiac-specific comorbidities, autologous bone marrow transplants, excisional debridement, and thoracic aneurysm repair.