I fear that I must disagree with IAAL.
Defined contribution retirement accounts governed by ERISA, i.e., 401(k) and 403(b) accounts, are protected from creditors. IRAs, on the other hand, are governed by state law and are not universally protected. Some states protect IRAs, while others do not or only provide partial protection (for example, protecting only IRA balances up to $1M).
I seem to have lost my link to a website that included a chart with this information for each state. I'll look for it....