WATERTOWN, Mass. and MELVILLE, N.Y., July 28, 2014--athenahealth, Inc. (NASDAQ: ATHN), a leading provider of cloud-based services for electronic health record (EHR), practice management, and care coordination, and Henry Schein, Inc. (NASDAQ: HSIC), the world's largest provider of health care products and services to office-based dental, animal health, and medical practitioners, today announced an expansion of their strategic agreement announced on May 21, 2014.