Humana Awarded LEED(R) Green Building Certification.

CHICAGO -- Humana Inc. (NYSE: HUM), one of the nation's largest health benefits companies, today announced that its Chicago office has been awarded LEED[R] Silver certification by the U.S. Green Building Council (USGBC) in its Commercial Interiors category. LEED, meaning "Leadership in Energy and Environmental Design," is the USGBC's leading-edge system for designing and constructing the world's greenest, energy efficient, high performing buildings.

Humana's Chicago office at 550 West Adams Street was designed to achieve LEED Certification for energy use, lighting, water and material use as well as incorporating a variety of other sustainable strategies. LEED verifies environmental performance, occupant health and financial return. LEED was established for market leaders to design & construct buildings that protect and save precious resources while also making good economic sense.

"We at Humana understand the important connection between health and environmentally-sound design," said Michael Kasper, president of Humana's Illinois market. "As a company, we've worked to become more environmentally conscious and to apply sustainable practices at our business locations. LEED certification is a significant recognition of our efforts, and we're proud to be one of the first companies to achieve this distinction for a commercial interior in the city of Chicago."

In July 2006, Humana occupied 55,000 sq. feet on two floors of the 18-story tower at Adams and Clinton Streets. The building was new, so Humana controlled much of the design and functionality of the space it leases. LEED certification for a commercial interior means that Humana was evaluated only on its efforts to build out, furnish and manage its two floors, as opposed to the entire building.

"Humana's LEED Silver certification and their commitment to green building strategies are indicative of the growing recognition of the importance that green buildings play in the improved health and environment of our city," said Suzanne Malec-McKenna, Chicago Department of Environment Commissioner. "Humana is setting an example that I hope many others in the private sector will follow. Efforts such as Humana's contribute to our goal of making Chicago the most environmentally friendly city in America."

"Humana is to be commended for achieving LEED Silver certification. This facility is one that both the community and Humana's customers can be proud of," said Rick Fedrizzi, President, CEO, Founding Chair, U.S. Green Building Council. "Humana's Chicago office is a showcase for high-performance, energy-efficient, healthy design, and an inspiration for others."

LEED Certification of Humana was based on a number of green design and construction features that positively impact the project itself and the broader community. These features include:

* An office interior designed so that 75 percent of the space receives natural light

* Sensors that dim lights when enough natural light is present

* Energy-saving equipment and appliances

* An active recycling program

* Low-emission carpeting, made from recycled content, that can be easily replaced and recycled when worn

* Regionally purchased construction materials and furnishings to minimize transportation-related pollution and fuel costs

* Customized ventilation and air filtration system for efficiency and air quality

* An agreement that Humana's housekeeping vendor use organic or "green" cleaning supplies

Humana's downtown Chicago office is home to more than 200 employees and serves as the company's regional headquarters for its commercial and Medicare health insurance operations in the Upper Midwest. Humana serves more than 450,000 health plan members in Illinois.

About the U.S. Green Building Council

The U.S. Green Building Council is the nation's leading non-profit organization composed of corporations, builders, universities, federal and local agencies working together to promote buildings that are environmentally responsible, profitable and healthy places to live and work. The Annual Greenbuild Conference as well as the LEED[R] (Leadership in Energy and Environmental Design) Green Building Rating System are projects of the USGBC. For more information on the USGBC, visit www.usgbc.org.

About LEED

The LEED[R] (Leadership in Energy and Environmental Design) Green Building Rating System is a voluntary third party rating system where projects earn points for satisfying specified green building criteria. Projects are evaluated within six environmental categories: Sustainable Sites, Water Efficiency, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Certified, Silver, Gold, and Platinum levels of green building certification are awarded based on the total points earned. LEED has been adopted nationwide by federal agencies, state and local governments, and interested private.

About Humana

Humana Inc., headquartered in Louisville, Ky., is one of the nation's largest publicly traded health benefits companies, with approximately 11.3 million medical members. Humana offers a diversified portfolio of health insurance products and related services - through traditional and consumer-choice plans - to employer groups, government-sponsored plans, and individuals.

Over its 46-year history, Humana has consistently seized opportunities to meet changing customer needs. Today, the company is a leader in consumer engagement, providing guidance that leads to lower costs and a better health plan experience throughout its diversified customer portfolio.

More information regarding Humana is available to investors via the Investor Relations page of the company's web site at http://www.humana.com, including copies of:

* Annual reports to stockholders;

* Securities and Exchange Commission filings;

* Most recent investor conference presentations;

* Quarterly earnings news releases;

* Replays of most recent earnings release conference calls;

* Calendar of events (includes upcoming earnings conference call dates and times, as well as planned interaction with research analysts and institutional investors);

* Corporate Governance Information.