PRESS RELEASE

SILVER SPRING, Md., April 18, 2013 /PRNewswire/ -- United Therapeutics Corporation (NASDAQ: UTHR) announced today that it will release its first quarter 2013 financial results before market open on Thursday, April 25, 2013.

United Therapeutics will host a half-hour teleconference on Thursday, April 25, 2013, at 9:00 a.m. Eastern Time.  The teleconference is accessible by dialing 1-877-351-5881, with international callers dialing 1-970-315-0533.  A rebroadcast of the teleconference will be available for one week and can be accessed by dialing 1-855-859-2056, with international callers dialing 1-404-537-3406, and using conference code: 32040188.

This teleconference is also being webcast and can be accessed via United Therapeutics' website at http://ir.unither.com/events.cfm.  [uthr-g]

United Therapeutics Corporation is a biotechnology company focused on the development and commercialization of unique products to address the unmet medical needs of patients with chronic and life-threatening conditions.

SOURCE United Therapeutics Corporation