Which statement about Medicaid is true?

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Medicaid is a joint federal-state program to provide health coverage for low-income and other eligible individuals. The federal government sets broad requirements and provides matching funds, but states administer the program and decide many details—such as who is eligible, which services are covered, costs to enrollees, and how care is delivered. Because states tailor these elements, coverage and benefits can look quite different from one state to the next. Some states have expanded Medicaid under the ACA to cover more adults, while others have not; some offer additional services like adult dental or vision, while others do not; and reimbursement approaches (managed care versus fee-for-service) vary as well. This is why the correct statement is that Medicaid varies by state. It is not uniform nationwide, it is not limited to urban areas, and it is not private insurance.