The Indianapolis-based health insurer's Institute of Health Care Knowledge compared people covered by traditional PPO, or preferred provider organization, health plans against the smaller number covered by consumer-directed plans. One example of such a plan is when high-deductible health insurance is combined with a tax-free health savings account.
Those with consumer-directed plans racked up slightly lower medical expenditures in 2007 than in 2006. But people covered by other types of plans spent from 7 percent to 10 percent more on health care services than in 2006.
Also, people covered by a consumer-directed health plan used preventive services 8.8 percent more than peers in other plans.
WellPoint based its study on nearly 8,000 of its employer customers that covered 300,000 workers or their family members with health benefits. Those employers were located in Indiana, Connecticut, Kentucky, Maine, Missouri, New Hampshire and Ohio.