Twenty-five million Americans pay for health insurance but have inadequate coverage. There's no magic formula for figuring out how much coverage is enough, but here are a few pitfalls to avoid:
High deductibles. A 2007 Commonwealth Fund report found that 25% of the underinsured pay annual deductibles of $1,000 or more, a red flag for scant coverage.
Caps or omission of services. Read your plan to check for limits on drug coverage or per-day hospital fees, which may leave you with bulging health-care bills.
Temporary or short-term policies. Buying into these plans may disqualify you from comprehensive long-term coverage later, especially...