When SSM Health acquired St. Louis University Hospital in 2015, CEO Bill Thompson promised to build a replacement.

On Wednesday, SSM released images of the new SLU Hospital — a sleek, modern structure with an all-glass exterior set to open in 2020.

The new 600,000-square-foot, 10-floor hospital will have 316 private patient rooms. In addition, SSM plans a four-story, 200,000-square-foot outpatient facility, a large parking garage and expanded emergency department with its own parking lot.

Total cost for the new medical center is $550 million.

Staff and physicians helped weigh in on the design of the new hospital and outpatient facility, and agreed on some guiding principles, Kate Becker, CEO of SLU Hospital said.

One important element was to ensure the teaching hospital is conducive to health care education. To achieve that, the new hospital hallways have alcoves big enough to fit 16 people, so doctors and residents can huddle in those areas, instead of stopping in the middle of the hallway and disrupting foot traffic.

Even though the hospital is in an urban area, Becker said, it was important to incorporate green space to project a soothing and healing environment. It’s something the current hospital campus lacks.