Answer:
If your referring to Medicare and Medicaid. It depends on what level of Medicaid you have and what type of service you are attempting to receive. In most circumstances the Medicare & Medicaid recipient will have some share of the cost of their medical care.
Depending on how impoverished the individual is, their income, assets, and medical issues all can affect what level of Medicaid the person receives or if they even qualify. This varies substantially from state to state since Medicaid follows broad federal guidelines but is customized by each state to meet the needs of their residents.
For just Medicare, yes there is a share of cost the is involved and it can be substantial. Medicare Advantage plans may be of help in controlling the costs but it requires a bit of legwork on the individuals part to weigh the benefits of the different options or to see if one is even of value to them.