ACHA

Last of a four-part series: Legislators passed a public health insurance expansion that would help poor and disabled children get better coverage over a year ago, but funds remain unused.

The technology has generated notices with errors, sent Medicaid paperwork to the wrong addresses, and been frozen for hours at a time, according to state audits, court documents, and interviews.

Representatives from a number of different health-care provider groups took part in a meeting Monday at the state Agency for Health Care Administration...