Envision Healthcare is exiting imaging, with its 400 radiologists joining industry giant Rad Partners. The nation's largest radiology practice—now employing 4,000 physicians—also has inked a "transition agreement" with Envision. This will grant its nearly 100 client care sites the option of continuing contracts with Rad Partners to ensure a seamless transition. Both sides emphasized this is not an acquisition but declined to disclose financial terms of the deal.