You can definitely be covered by both at same time! No reason you should lose it unless your income is too high. It works different in each state, many have private managed care you have to pick from or a one state entity. Once you are on, it's only income level that can take you off. Medicaid subsidizes or supercedes the Medicare, but you get both. In most cases will cover the Medicare premium! You just won't have the choice of providers that one has with plain vanilla Medicare, it will be managed care somehow with a network. (But then hardly anyone can afford the plain vanilla Medicare with freedom to choose anymore, because of the co-pays with costs going so astronomical.)

I think the only problem one runs into is that for over 65 in some states it may be a lower income limit required than before 65, or asset liquidation because of the whole nursing home thing, how everyone uses spend down to no assets to get mom and pop poor so Medicaid will pay for the nursing home? Not sure about that, though.

I won't say who it is, but there is a member here at Dag who is over 65 and gets both Medicaid and Medicare, as well getting some help with housing, we've discussed it privately. Is fairly happy with it. Maybe the person will chime in.

My mentally disabled brother gets both too, has for 20 yrs. One good thing Medicaid adds to Medicare for him in his state is basic dental and basic eye care (and I am talking very very basic, but at least it's something.)

This couple probably was in a situation where they had above Medicaid income but the co-pays and deductibles with Medicare started to get way out of hand and they are charging them on credit cards and robbing Peter to pay Paul, because you think "my health is everything, worry about it later" and having trouble with supplemental's not authorizing and they pay out of pocket and before you know it they are underwater and with more bills coming in. With some of them unfair, but people are frightened into paying for them. And you can't just apply for benefits all of a sudden, you've got to have like Form 1040 proof or file bankruptcy,  things that take time. Thing is: where it gets pretty hopeless in this mess when you are ill, unless you have like a good social worker or similar helping you because navigating this shit is a hellavu lotta work and you sure don't have the energy for that when you are very ill.