Online Groupons for health services? Doctors and hospitals sharing patient data and treatment goals with retail clinics, pharmacies and urgent care centers? Hospitals luring patients with inviting atriums and indoor waterfalls? It’s all part of a wave of “retailization” as the nation’s transforming health system emerges from behind the walls of hospitals, labs and doctors’ offices, and repositions itself as a more retail-oriented, patient-friendly network of care.