Author: Health InsuranceThe U.S. Department of Defense’s Tricare Management Activity will extend a contract with Humana Military Healthcare Services Inc. through March 31, 2011, according to a filing today with the U.S. Securities and Exchange Commission.The contract was set to expire at the end of March 2010.Humana Military, a subsidiary of Louisville-based insurer Humana Inc. (NYSE: HUM), provides managed-care services for 3 million...more