The administrator of the Centers for Medicare and Medicaid Services (CMS) deleted some of her emails and may not be able to cooperate with a congressional investigation into the flawed Obamacare rollout, CMS has warned Congress.

Marilyn Tavenner, who was appointed by President Obama to take over CMS within the Department of Health and human Services in 2013 — prior to the Obamacare rollout — deleted some of her emails and did not save hard copies as the Federal Records Act requires her to do, MSNBC reported Thursday.

Though Tavenner’s computer did not crash like ex-IRS official Lois Lerner’s computer allegedly did, Tavenner may be unable to cooperate with House Oversight and Government Reform Committee subpoenas.

“During her entire tenure at CMS, Ms. Tavenner’s CMS email address, which is accessible to both colleagues and the public, has been subject to write-in campaigns involving thousands of emails from the public,” according to a letter CMS sent Wednesday to the National Archives and Records Administration. “Therefore, she receives an extremely high volume of emails that she manages daily. To keep an orderly email box and to stay within the agency’s email system capacity limits, the Administrator generally copied or forwarded emails to immediate staff for retention and retrieval, and did not maintain her own copies.”

CMS noted that this practice of not keeping emails “continued until November 2013,” just one month after the Obamacare website launched.

“It is possible that some emails may not be available to HHS,” the letter stated.

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