Sun Life Financial Expands Dental Network Through New Agreement With Cofinity

WELLESLEY, Mass. and HARTFORD, Conn., February 13, 2008 — Sun Life Financial (NYSE: AET) announced today an agreement that will expand Sun Life Financial’s dental network for its group insurance customers. Through this partnership, Sun Life Financial will offer the Aetna Dental Access® network in 13 key states* and Washington, D.C.

This agreement is between Sun Life and Health Insurance Company (U.S.) and CofinitySM, the division of Aetna that provides health-related services and products to other insurance companies, third-party administrators, health plans and other customers.

"This arrangement will immediately benefit our customers in many parts of the country," said Sue Schoch, vice president, Group Dental, Sun Life Financial Employee Benefits Group. "By combining our industry-leading claim service with this solid network, we will increase the momentum of our group dental offering."

"This is an important new relationship for Aetna," said Dan Fishbein, M.D., president of Cofinity. "We are pleased to be able to offer Sun Life Financial’s customers increased access to dental providers."

About Sun Life Financial
Sun Life Financial is a leading international financial services organization providing a diverse range of protection and wealth accumulation products and services to individuals and corporate customers. Chartered in 1865, Sun Life Financial and its partners today have operations in key markets worldwide, including Canada, the United States, the United Kingdom, Ireland, Hong Kong, the Philippines, Japan, Indonesia, India, China and Bermuda. As of September 30, 2007, the Sun Life Financial group of companies had total assets under management of US $430.6 billion.

Sun Life Financial Inc. trades on the Toronto (TSX), New York (NYSE) and Philippine (PSE) stock exchanges under ticker symbol SLF. Visit Sun Life Financial’s website at

About Cofinity
Cofinity offers access to provider networks, medical management services and other health care programs to customers outside Aetna’s core distribution channels. Cofinity is the new brand name for many businesses that have been created, acquired or expanded over the past three years by Aetna, such as HMS Healthcare, PPOM, Sloans Lake, Flora Health Networks and Aetna Health Plan Services. In addition to dental network access, products being offered through the Cofinity brand include PPO provider networks in six states, a national transplant network, stop loss insurance coverage, credentialing, medical management programs, out-of-network claims management, and fraud and abuse detection services. Cofinity currently serves 2.5 million members at 200 health plans and insurance companies via these products.

About Aetna
Aetna is one of the nation’s leading diversified health care benefits companies, serving approximately 36.7 million people with information and resources to help them make better informed decisions about their health care. Aetna offers a broad range of traditional and consumer-directed health insurance products and related services, including medical, pharmacy, dental, behavioral health, group life and disability plans, and medical management capabilities and health care management services for Medicaid plans. Our customers include employer groups, individuals, college students, part-time and hourly workers, health plans, governmental units, government-sponsored plans, labor groups and expatriates.

* The 13 states are WA, OR, ID, NY, NJ, CT, RI, PA, MA, DE, MD, VA and UT

Copyright Aetna Inc.