CVS Health and Aetna. Cigna and Express Scripts. Amazon, Berkshire Hathaway and JPMorgan Chase. Each one of these deals is evidence that corporate America will continue to march into the medical arena, uniting once-distinct healthcare enterprises under one roof. While the long-held divisions between U.S. healthcare stakeholders may be getting hazy, the aim is clear: to deliver convenient, high-quality care to consumers at a lower cost.