In my state, that's not exactly true.

In my state, the secondary coverage is ONLY for the co-pay of whatever is covered by Medicare. If a service isn't covered by Medicare, the secondary state coverage will not cover it.

And in my state, while it is indeed state insurance through social services, don't you DARE refer to it as "Medicaid" because MANY doctors/therapists will tell you that they don't accept Medicaid and refuse to take you on as a patient. The truth is that I can see any doctor who accepts Medicare, and if they accept Medicare, they accept my secondary insurance, too.

Oh, and my secondary insurance does indeed carry across state lines, even though some doctors will refuse the card because it has my state on it and they are in another state. This is a big difference because most Medicaid programs do not carry across state lines. I think it really does vary from state to state, so you have to figure out how your state runs the program.

I think that in other states it may be called "medicaid" but in my state it is not. However, it is pretty much the same function.....a state based insurance that covers Medicare premiums and co-pays for those who have low incomes.