HSAs are, by legal requirement, only available if you are enrolled in a High-Deductible Health Plan [1], which is insurance and does pay for something, though (as the name suggests) it has a very high annual deductible (for which the HSA is used).
So if you have an HSA, you do, in fact, have insurance.
So if you have an HSA, you do, in fact, have insurance.
[1] http://en.wikipedia.org/wiki/Health_savings_account