My ex lives with me and is my dependent but has no income. Can I get her on my healthcare.gov policy?
As a rule of thumb, you cannot cover a divorced spouse under your health plan. However, there are some situations that provide a sort of exception to this rule.
If you have a domestic partnership and claim a person as your tax dependent and/or have a kid together, then you can add that person to your health plan (there are special rules for Qualified Domestic Partners (QDPs)).
Therefore although the general answer is that you cannot cover a divorced spouse under your health plan, if an ex is currently an unmarried domestic partner who meets the above criteria, then there may be options. You should let healthcare.gov know the specifics of your situation so they can help you get the right plan!