Georgia experienced a dramatic increase in the number of people signing up for health care coverage during a special enrollment window for the Affordable Care Act.

If Devoted Health raises the $1.2 billion it desires, it will hold the largest valuation—and stock price—among the other insurance upstarts.

Among the 20 companies, one large insurer stood out for the share of payments it received for diagnoses that were listed on patients' chart reviews and health risk assessment services, but nowhere else.

Health plan CEOs make more than their counterparts at property and casualty and life insurance companies, S&P Global Market Intelligence reports.