Item 7.01 Regulation FD Disclosure.

On February 14, 2013, United Therapeutics Corporation issued the press release attached hereto as Exhibit 99.1, which is incorporated herein by reference.

Item 9.01. Exhibits.

This information shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

(d) Exhibits

Exhibit No. Description of Exhibit

99.1 Press release dated February 14, 2013

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