In Indianapolis’ 10 poorest census tracts, 60 percent of residents had not visited a dentist within 12 months, according to an IBJ analysis of CDC and Census Bureau research. But in the 10 tracts with the lowest poverty rates, just 25 percent hadn’t.

Whether so-called micro-hospitals can succeed financially might depend on whether they can meet Medicare’s definition of a hospital: a medical facility that dedicates the bulk of its services to inpatient care.

For years, medical-device makers in Indiana and around the nation have insisted that the 2.3 percent tax on sales to help fund the Affordable Care Act has hurt business and slowed innovation.