A massive billing glitch Dec. 5 in Tricare's East region, managed by Humana, slammed about 25,000 beneficiaries with premium charges 100 times more than they owe monthly for their coverage. The problem impacts all users in the East region who automatically pay monthly enrollment fees by credit or debit card, including military retirees on Tricare Prime and those enrolled in Tricare Reserve Select, Tricare Retired Reserve and Tricare Young Adult. It does not impact retirees and others who pay premiums through paycheck allotment. Read more on Military.com.