Graymark Healthcare : Letter of Intent to Acquire Nocturna Sleep, LLC

March 25, 2008—Graymark Healthcare, Inc. (OTCBB: GRMK), through its wholly owned subsidiary SDC Holdings LLC, is pleased to announce it has signed a letter of intent to acquire Nocturna Sleep, LLC located in Las Vegas, Nevada. Nocturna performs over 3000 sleep studies a year in the Las Vegas market, which is one of the fastest growing cities in the United States.

"The Letter of Intent to acquire Nocturna is another substantial addition to our sleep diagnostic business... Graymark Healthcare's Press Release -