Using panel data from two surveys of employees at one large employer from 2004 and 2005, this paper examines consumer-directed health plans' (CDHPs') influence on the use of health-related information and health services. We compare enrollees in a high-deductible CDHP, a lower-deductible CDHP, and a preferred provider organization (PPO). Enrollees in the lower-deductible CDHP were more likely than enrollees in the other plans to start using information. Enrollees in the high-deductible CDHP were more likely than those in the PPO to start forgoing medical care to save money. [Health Affairs 27, no. 4 (2008): 1120-1131 10.1377/hlthaff.27.4.1120 T h e g r ow t h o f c o n s u m e r-directed health plans (CDHPs) has been rapid. 1 These plans usually combine a savings account, high-deductible insurance coverage, and information on the costs and quality of hospitals and doctors. Proponents of these plans believe that they give health care consumers more "skin in the game," through greater cost exposure, which will promote more cost-effective utilization decisions. Ultimately, the hope is that such decisions will result in lower costs and slower growth in health care spending. Critics have argued that these plans benefit only the "healthy, wealthy, and wise" segment of the insurance market and shift the burden of health care financing onto the poor and sick. 2 n Previous research findings. There has been much debate over the policy to promote CDHPs and their design, and some work has attempted to model CDHPs' impact. 3 Results from a telephone survey of the general population by the Commonwealth Fund and the Employee Benefit Research Institute (EBRI) suggest that enrollees in high-deductible plans are less satisfied with their health plan; are more likely to avoid, skip, or delay health care because of costs; and are more cost-conscious than those in comprehensive health plans. 4 Analysis of claims data from one large employer found lower physician visits and pharmacy use but higher hospital admission rates among CDHP enrollees. 5 n Objectives of our research. Our aim is to understand the impact of CDHPs on consumers' self-reported behavior, using survey data from a large single-employer population. We compared employees who enrolled in high-or lower-deductible CDHPs at the beginning of 2004 with employees who remained in a PPO. Specifically, we addressed the following research questions: (1) Does the provi-1 1 2 0 J u l y /A u g u s t 2 0 0 8 H e a l t h T r a c k i n g