A nonprofit women's advocacy group is challenging the legality of "gender rating" of long-term care policies by four major insurance companies. The complaints were filed today by the National Women's Law Center with the U.S. Department of Health and Human Services' Office for Civil Rights. The organization asserts that recently adopted gender rating practices by Genworth Financial Inc., John Hancock Financial, Transamerica Life Insurance Co. and Mutual of Omaha violate an anti-discrimination rule enacted as part of the federal health care overhaul. "By gender rating their long-term care insurance policies, these companies are charging women 20 to 40 percent more than men for the same product," NWLC Co-President Marcia Greenberger said in a release. "Requiring women to pay higher prices just because they are women is wrong, unfair and, thanks to the Affordable Care Act, is now illegal sex discrimination," she said.