Medicare chief Marilyn Tavenner to testify before Congress about HealthCare.gov

The Washington Post: Marilyn Tavenner is head of a $1 trillion-a-year agency that provides Medicare and Medicaid coverage to 90 million Americans — and is overseeing the implementation of President Obama’s health-care law.

As recently as late September, she predicted that the Affordable Care Act would have a smooth launch on Oct. 1.

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