A major difficulty for people on Medicaid is the inability to find doctors and dentists willing to accept the plan. For those people who need primary care, the result is often hours and hours in clinics waiting to see a general practitioner and month-long waits for specialists.
According to the New York Times, having a Medicaid card does not in any way assure access to care. Medicaid patients cannot find surgeons willing to operate on them, or find mental health specialists willing to see them.
Unfortunately, the new health laws that depend heavily on Medicaid to help the already uninsured are only likely to put a bigger burden on states that are looking for ways to cut back.