Health and Human Services Secretary Sylvia Mathews Burwell declared that “the Affordable Care Act is working” in a speech delivered at the Brookings Institution last week, in the process announcing a 25 percent increase in the number of insurers expected to participate in federal and state exchanges for next year. The number of insurers so far is up from 252 this year to 315 for next year. For the federal marketplace serving 36 states, the number is up almost 30 percent to 248 for next year. States seeing a substantial increase in the number of insurers include Indiana, Missouri and New Hampshire. Federal officials also announced that a redesigned Healthcare.gov will include a shorter, simpler online application form for the start of open enrollment in November.