Medical Billing Rights in California
About this article
Reviewed by the Commoner Law Editorial Team. Sourced from primary statutes (U.S. Code, CFR, state compiled statutes) and official government agency guidance. Written in plain language for general understanding — this is educational content, not legal advice. Our editorial standards
How California differs from federal law
California was a leader in surprise billing protections before the federal No Surprises Act:
- AB 72 (Health & Safety Code § 1371.30, effective 2017): California's surprise billing law prohibits out-of-network providers at in-network facilities from billing patients more than the in-network cost-sharing amount. This law predates the federal No Surprises Act and remains in effect alongside it.
- Knox-Keene Health Care Service Plan Act (Health & Safety Code § 1340 et seq.): Regulates managed care plans in California. Requires health plans to provide a timely and accurate claims process and prohibits retroactive denial of authorized services.
- Medi-Cal (California's Medicaid): Covers adults up to 138% of the federal poverty level, with some populations covered at higher income levels. California also provides Medi-Cal to undocumented adults aged 26 to 49 through state funding.
- Charity care: California Health & Safety Code § 127400 et seq. requires nonprofit hospitals to have charity care and discount payment policies, and to inform patients about available financial assistance before pursuing collections.
Additional Steps in California
File a billing complaint with the California Department of Managed Health Care at dmhc.ca.gov or call (888) 466-2219. For Medi-Cal issues, contact the Department of Health Care Services at dhcs.ca.gov. Contact Health Consumer Alliance at healthconsumer.org or call (888) 804-3536 for free billing help.
Relevant Law: Cal. Health & Safety Code § 1371.30 (AB 72 — surprise billing), Cal. Health & Safety Code § 1340 et seq. (Knox-Keene Act), Cal. Health & Safety Code § 127400 et seq. (charity care), Cal. Welfare & Institutions Code § 14000 et seq. (Medi-Cal)
Federal baseline: Medical Billing Rights nationwide
What is this right?
The No Surprises Act took effect January 1, 2022, after years of horror stories about patients receiving four- and five-figure bills from anesthesiologists, radiologists, and ER doctors they never chose and never met. The fix: out-of-network providers can't bill you more than your in-network cost-sharing amount in most emergency and certain non-emergency situations.
If you're uninsured or self-paying, you have the right to a good faith estimate of costs before scheduled care. If the final bill exceeds the estimate by $400 or more, you can dispute it. You also have the right to an itemized bill for any service — and you should ask for one routinely. Independent studies have estimated that a substantial percentage of hospital bills contain errors.
When does it apply?
The No Surprises Act protects you when:
- You receive emergency care at any hospital or ER, regardless of network status.
- An out-of-network doctor (anesthesiologist, radiologist, pathologist, ER physician) treats you at an in-network hospital.
- You are airlifted by an out-of-network air ambulance.
- You are uninsured or self-paying and want to know costs up front.
- You receive a bill you think is wrong or inflated.
Three myths:
- "The No Surprises Act covers everything." It covers emergency services and out-of-network providers at in-network facilities. If you knowingly choose an out-of-network provider for non-emergency care and sign a consent notice waiving your protections, you can still get a higher bill.
- "I can't fight a medical bill." You can. Request an itemized bill, compare it line by line against your insurance EOB, dispute errors, and negotiate. Hospitals routinely accept less than the billed amount.
- "Uninsured means no protections." Wrong. Uninsured patients have a right to a good faith estimate before scheduled care. Final bill exceeds the estimate by $400+, and you can dispute through the patient-provider dispute resolution process at cms.gov/nosurprises.
What to Do If You Received an Unexpected or Incorrect Medical Bill
Step 1: Get the good faith estimate first if you can. Uninsured or self-pay? Providers and facilities must give you an estimate of expected charges before scheduled care. Save the document — it's your evidence if the actual bill is way off.
Step 2: Demand an itemized bill. Every line, every code, every supply. Compare against your insurance EOB. Errors at the line-item level are extremely common.
Step 3: For surprise bills, invoke the Act in writing. Contact your insurer and the provider. Under the No Surprises Act, you owe only your in-network cost-sharing amount (copay, coinsurance, deductible) for covered situations.
Step 4: Dispute resolution within 120 days. Final bill exceeds your good faith estimate by $400+? Start the patient-provider dispute resolution at cms.gov/nosurprises or call 1-800-985-3059. The 120-day window from the date of the bill is firm.
Step 5: Ask about financial assistance. Under IRC § 501(r), every tax-exempt nonprofit hospital must have a written financial assistance policy and screen patients for it before pursuing collections. Income thresholds are often surprisingly generous — frequently 200—400% of the federal poverty level. Apply even if you think you don't qualify.
What should you NOT do?
Don't ignore medical bills. Unpaid bills end up in collections, damage credit (though new rules have softened this), and can become lawsuits. If you're disputing, respond in writing inside the timeframes given.
Don't sign waivers of your surprise billing protections without reading. Out-of-network providers may ask you to sign a "notice and consent" form waiving No Surprises Act protections for non-emergency care. You're never required to sign this for emergencies. For non-emergencies, signing means agreeing to pay out-of-network rates that may run thousands more.
Don't pay a bill you suspect is wrong without questioning it. Itemized bill, line by line, EOB comparison. Errors are common and money paid is much harder to claw back than money disputed.
Don't assume you can't negotiate. Providers regularly reduce bills, offer interest-free payment plans, give prompt-payment discounts, and write off debt for people who qualify for charity care. Ask before paying full price.
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