As drivers pass through Augusta on Interstate 95, Maine's newest hospital comes into view just off Exit 113. Four stories of brick and gleaming glass now stand in what was once a grassy field, a $322 million project just months away from opening to patients as the Alfond Center for Health. Just a few miles away, lawmakers continue a heated debate about how to repay Maine's hospitals $484 million in overdue Medicaid bills dating to 2009. Hospitals have stressed the debt's consequences — from layoffs to frozen wages to eliminated services — in pressing legislators to make good on the state's long-standing IOU.