State officials have estimated that the freezes would deny coverage to approximately 135,000 people in the first year. The overall program provides healthcare coverage for approximately 1.3 million people.
The freezes would not affect people currently enrolled unless they drop out of the program and then try to re-enroll.
The freezes would combine to provide approximately $200 million of a projected $500 million of savings anticipated under Brewer's plan. Payment reductions to care providers and other steps would provide the balance.
The Supreme Court's action was a setback for the challengers, but attorney Ellen Katz said she and other plaintiffs' attorneys will file a new but similar lawsuit Monday in state trial court to challenge the program changes and ask for an order blocking the July 1 freeze.
The state still needs federal approval of its proposed implementation plan for the July 1 freeze. That plan is pending with federal officials in Washington.
However, the state does not require federal approval for the freeze itself because it involves an eligibility category that isn't federally mandated. Also, the state gets to redesign its plan when it automatically comes up for federal reauthorization Oct .1.
The July 1 freeze would prohibit new sign-ups by childless adults with incomes above a federal standard but below the current one used by the state.