Health Care Service Corp. didn't pay a dime in federal taxes in 2018, according to its latest financial report. Instead, the health insurance conglomerate received a $1.7 billion tax refund, which swelled the company's net profit to $4.1 billion. The big picture: As Axios reported last year, the Blue Cross Blue Shield companies were on track to retain huge sums of money in 2018 due to the Republican tax overhaul and the growing profitability of their health plans. HCSC was among the biggest winners.