Camden, N.J.

For decades, nonprofits, health insurers and hospitals have been trying to solve the problem of the people who need the emergency room again and again. Here are some of the lessons they've learned.

Residents of an apartment building in Camden, N.J., racked up more than $1 million a year in hospital admissions and trips to the ER over about a decade. In response, a community group opened a doctor's office on the ground floor. But at first, residents weren't as eager to go as doctors had hoped.