The Medicare enrollment system represents an ongoing, high-stakes administrative headache for Medicare Part-B providers. Keeping enrollment data current is a complex, detail-oriented process, but the price for failure is the potential loss of Medicare billing privileges. In his article, “The Medicare Part-B Enrollment Obstacle Course: It Hasn’t Gotten Any Easier,” Daniel Shay revisits the complexities of the Medicare enrollment system, looking at what has and hasn’t changed in the past eight years. He examines real-world examples of Part-B providers running afoul of Medicare’s enrollment requirements, and their largely unsuccessful attempts to challenge their subsequent loss of billing privileges. Finally, he offers practical strategies for maintaining accurate enrollment data to avoid problems in the first place.