Medical Staffing Network Holdings Inc. (NYSE: MRN), the largest provider of per diem nursing in the U.S., said it was notified by the New York Stock Exchange that it was out of compliance with listing standards. The company's market capitalization was less than the required $75 million. Medical Staffing Network has a market capitalization of $67.4 million as of Oct. 3.

The company said it has 45 days to submit a plan to get back in compliance and continue with its listing on the NYSE.