Experts thought if people bought health insurance through the Affordable Care Act, they would find a private doctor and stop using hospital emergency rooms for their primary care. Well, more people have health insurance. But they are still crowding into emergency departments across the nation. An online study by the American College of Emergency Room Physicians found that nearly half of its members have seen a rise in visits since Jan. 1 when ACA coverage began. A resounding 86 percent of the physicians said they expect that number to continue growing.