Patient Refund Laws in California: BPC 732 and Deadlines

Patient refund laws in California start with one statute: Business and Professions Code Section 732. If you paid a physician or dentist and your insurer later paid for the same services, the provider must return the duplicate payment. The deadline is 30 days from your written request, or 30 days after they receive the second payment if it hadn’t arrived yet when you asked. If you never ask, the provider still has to notify you within 90 days of learning about the overpayment and refund it within 30 days after that. Miss those deadlines and the provider has committed unprofessional conduct, which the Medical Board or Dental Board can discipline.¹

What BPC 732 Actually Covers

The statute is narrower than a general overcharge rule. It targets one specific situation: you paid a physician or dentist for services, and then a third-party payor (usually your insurer) paid for those same services, leaving the provider holding both payments. That’s the fact pattern the law addresses. A dispute about whether a charge was reasonable, or whether a service was billed correctly in the first place, is a different problem and falls outside BPC 732.¹

One point of confusion worth clearing up: some sources attribute this rule to the Health and Safety Code. That’s wrong. Health and Safety Code Section 1371.1 does deal with overpayments, but it governs the financial relationship between health plans and providers. It doesn’t create a patient’s right to a refund. The statute that protects you as a patient who personally overpaid is BPC 732.²

The 30-Day and 90-Day Deadlines

Two clocks run under BPC 732, and which one applies depends on whether you’re the one raising the issue.

If you request a refund, the provider has 30 days after your request to return the duplicate payment. When the insurance payment hasn’t arrived yet at the time you ask, the 30-day clock doesn’t start until the provider actually receives that duplicate payment.

If you never request a refund, the provider still has an affirmative duty. They must notify you of the duplicate payment within 90 days of the date they knew or should have known about it. After that notice, they have 30 more days to issue the refund, unless you tell them to keep the credit on your account.¹

The 90-day notification requirement is the part providers often overlook. They can’t sit on an overpayment and wait for the patient to notice.

How to Trigger the Clock

A refund request should be in writing. A phone call may feel faster, but written requests create a dated record and make the 30-day deadline enforceable. Send the request by a method that produces proof of delivery, and keep a copy.

Include the patient’s name, dates of service, the specific charges you paid, the insurance payment that duplicated your payment, and the amount you’re asking to be refunded. Attach your itemized bill and the insurance explanation of benefits showing the duplicate payment. That documentation forecloses the most common provider response, which is to say the overpayment was never confirmed.

What Happens if a Provider Ignores the Law

Violating BPC 732 constitutes unprofessional conduct. For physicians, that triggers disciplinary authority under the Medical Practice Act; for dentists, the Dental Practice Act. The Medical Board of California and the Dental Board of California can impose discipline ranging from a reprimand to probation to license suspension.¹

The Medical Board generally does not intervene in pricing disputes or ordinary billing disagreements. Duplicate insurance payments are the exception, because that conduct is specifically governed by BPC 732.³

Getting the Records You Need

You can’t prove a duplicate payment without the paperwork. Federal law gives you access to it. Under the HIPAA Privacy Rule, providers must give you access to your medical and billing records on request. The designated record set you’re entitled to inspect or copy includes billing and payment records, insurance information, and clinical records.⁴

The provider must act on the request within 30 days. They can take one additional 30-day extension, but only by notifying you in writing of the reason. No second extension is allowed.⁵

Request an itemized statement, not a summary. Then line it up against the explanation of benefits from your insurer. Duplicate payments show up in that comparison.

If You’re Uninsured or Paying Cash

BPC 732 addresses duplicate insurance payments, so it doesn’t reach the self-pay patient who was simply overcharged. Federal law does. Under the No Surprises Act, before a scheduled service, providers must give uninsured and self-pay patients a good faith estimate of expected charges. If the final bill exceeds that estimate by $400 or more for a given provider or facility, you can challenge the excess through the federal patient-provider dispute resolution process.⁶

The rules of that process:

You must submit the dispute within 120 calendar days of receiving the bill that exceeded the estimate.
While the dispute is pending, the provider cannot send the bill to collections, threaten collections, or add late fees. If the bill is already in collections, the provider must halt those efforts.
The provider cannot retaliate against you for using the process.
An independent dispute resolution entity reviews the case. Unless the provider produces credible evidence that the higher charge reflected medically necessary care due to unforeseen circumstances, the amount owed is generally reduced to the good faith estimate.

The $400 threshold applies per provider or facility, not to the bill as a whole. If one provider’s charges exceed their portion of the estimate by $400 and another’s don’t, only the first is disputable.⁶

Where to File a Complaint

The right agency depends on who owes you the money. Filing with the wrong one usually just gets you a referral, but it can cost weeks.

Physician who won’t refund a duplicate payment: file with the Medical Board of California. The Board doesn’t handle ordinary billing disputes, but it does cover the duplicate-payment scenario BPC 732 addresses.³
Dentist who won’t refund a duplicate payment: file with the Dental Board of California, which has parallel authority under BPC 732.
Health plan (HMO or managed care): file with the Department of Managed Health Care. You can submit an Independent Medical Review request or a complaint electronically, by mail, or by fax.⁷
Traditional insurer (PPO or indemnity plan): file with the California Department of Insurance.

If you’re not sure whether your coverage is a health plan regulated by the DMHC or an insurance product regulated by the Department of Insurance, check your insurance card or call the DMHC Help Center.

Defenses You Should Expect

Providers respond to refund demands with a familiar set of arguments. Knowing them helps you prepare.

The most common defense is that the overcharge was a clerical error. Under BPC 732, intent isn’t the issue. The statute requires refund of duplicate payments regardless of how they happened. Intent may affect the severity of discipline the Board imposes, but it doesn’t erase the refund obligation.

Providers also point to third-party billing companies. That doesn’t work either. BPC 732 places the duty on the physician or dentist personally, not on their billing vendor. Outsourcing billing doesn’t outsource the legal responsibility.

The more substantive response is that no overpayment actually occurred. Explanations of benefits can be confusing, and what looks like a duplicate payment sometimes reflects legitimate separate charges for services on the same date. Before you escalate, compare your itemized bill against the explanation of benefits line by line. If each payment corresponds to a genuinely different service, you don’t have a duplicate payment claim.

Keep every document: the original bill, the explanation of benefits, your written refund request, and any provider response. If 30 days pass after your request and no refund arrives, take the file to the appropriate licensing board. For uninsured patients with a good faith estimate in hand, the 120-day federal deadline is firm, so don’t wait until the final week.

1
California Legislative Information. California Business and Professions Code 732
2
California Legislative Information. California Health and Safety Code 1371.1
3
Medical Board of California. Guide to the Complaint Process
4
U.S. Department of Health and Human Services. Individuals’ Right under HIPAA to Access their Health Information
5
eCFR. 45 CFR 164.524 – Access of Individuals to Protected Health Information
6
eCFR. 45 CFR 149.620 – Requirements for the Patient-Provider Dispute Resolution Process
7
California Department of Managed Health Care. Independent Medical Review/Complaint Forms