LOUISVILLE, Ky.–(BUSINESS WIRE)–For the second year in a row, Humana Inc. (NYSE: HUM) was ranked as the number one company for its ease of doing business with providers. Humana ranked number one in overall performance among 148 U.S. health insurers based on a review of 2013 claims-payment data conducted by athenahealth, Inc. (NASDAQ: ATHN). Continue reading →