There is a lot of confusion about this I think because I don't live in Mass yet I had similiar issues in my state.

Medicaid worked UNTIL I got on disability. I was then deemed uneligible for Medicaid.

Medicare then kicked in and because my disability checks are so low, I am eligible for state aid as well, but it is NOT "medicaid". (This is where the confusion comes in as people think they get both Medicare and Medicaid but technically, no, they don't.)

The benefits of state aid include covering my medicare premiums and deductibles. That is all! I cannot get medicaid services. Any doctor that accepts medicare MUST accept the supplemental insurance (even though some will argue that they don't). I am not eligible to see "medicaid" doctors but I am eligible to see "medicare" doctors. Medicaid services typically don't transfer from state to state, but my supplemental state aid DOES (I've called multiple times to confirm this and my out of state doctors have indeed been paid.)

Are you sure you're enrolled in the correct program?