Doctors and Insurers Sue to Block California's New Health Tax, Citing Voter Limits

Key points

• The California Medical Association and California Association of Health Plans filed a lawsuit in the California Supreme Court, alleging the new managed care organization (MCO) tax violates Proposition 35.
• Proposition 35, approved by 68% of voters in 2024, limits how much the state can tax commercial health plans and restricts how the revenue can be spent.
• The new tax, passed by the legislature and signed by Gov. Newsom in June 2026, is expected to increase premiums by $100 per person per year, or $400 for a family of four.
• The state argues the tax is necessary to offset revenue shortfalls caused by federal changes, specifically the 'One Big Beautiful Bill Act,' which restricts previous tax structures.
• Critics, including Paragon Health Institute President Brian Blase, argue the tax is a response to unsustainable spending, including $12.4 billion spent in 2025 on healthcare for unauthorized immigrants.
• Newsom's office maintains the tax is legal and that the state is submitting a two-track proposal to comply with federal law while respecting Proposition 35.

Background

This dispute occurs amid a broader fiscal crisis in California, where the state has faced a mass exodus of residents and businesses, partly due to high costs of living. The new health tax is part of a record-breaking $350 billion state budget, which also includes a new sales tax on software downloads. The state has been grappling with significant revenue gaps, partly attributed to federal funding cuts, and has sought various measures to offset these shortfalls, including the controversial health plan tax.

How outlets are covering it

Fox News emphasizes the impact on private insurance holders and the role of illegal immigrant healthcare costs, citing Brian Blase of the Paragon Health Institute. The New York Post highlights the 'largest tax hike in history' label from the California Taxpayers Association and the coalition of doctors and insurers. Tri County Sentry focuses on the legal arguments regarding Proposition 35 and the state's defense of the tax. All sources agree on the basic facts of the lawsuit and the tax's potential impact on premiums, but differ in emphasis on the underlying causes and political implications.

Why it matters

The outcome of this lawsuit could significantly affect healthcare costs for millions of Californians and set a precedent for how states can adjust taxes in response to federal changes. It also highlights the tension between voter-approved limits and state fiscal needs, potentially influencing future healthcare and tax policies in California and other states.

What to watch

The case will proceed through the California court system, with the state defending the tax's legality and the plaintiffs arguing it violates Proposition 35. The federal approval of the tax structure will also be a key factor, as the state has submitted a two-track proposal to comply with the 'One Big Beautiful Bill Act.'