Some groups of people are categorically eligible for Medicaid. That means they are in a category that may make them able to get Medicaid. These groups include families with children, pregnant women, the elderly, and people with disabilities. The federal law has mandatory categories – groups of people states must cover – and optional categories, which states may or may not cover. Being in a category eligible for Medicaid does not mean that you automatically qualify. You must also meet income and residency requirements. If you are an immigrant you must have legal status, and in most states, been in the country for at least five years.