Humana Inc., together with its subsidiaries, operates as a health and well-being company. The company operates through three segments: Retail, Group, and Healthcare Services. The Retail segment provides Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products directly to individuals. This segment has contract with Centers for Medicare and Medicaid Services to administer the Limited Income Newly Eligible Transition prescription drug plan program and state-based Medicaid businesses. The Group segment offers Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and voluntary benefit products, as well as administrative services only products, and health and wellness solutions directly to employer groups. The Healthcare Services segment provides pharmacy, provider services, home based services, integrated behavioral health services, and predictive modeling and informatics services to its health plan members, as well as to third parties. The company also offers military services, such as TRICARE South Region contract; Puerto Rico Medicaid; and closed-block long-term care insurance policies. As of March 31, 2015, the company had approximately 14.2 million members in medical benefit plans, and approximately 7.4 million members in specialty products. The company has a research collaboration with Allergan plc. Humana Inc. was incorporated in 1964 and is headquartered in Louisville, Kentucky.