A new California law prohibits insurers from rejecting or delaying your claims because they can't accept electronic documents—and most providers don't know it exists.
Most health care service owners assume that if an insurer or health plan says it can't accept electronic claim documentation, that's just how the system works. It isn't—and a provision buried in AB2499 is about to change that assumption.
Starting May 26, 2028, California health care service plans and insurers are legally prohibited from denying, pending, or delaying claims simply because their own systems cannot accept electronically submitted medical records and supporting documentation. In plain terms: if you submit your claim documents electronically, the payer cannot penalize you for their technical limitations.
For decades, the claims submission process has been a one-way street. If a payer's system only accepts paper or a specific proprietary format, providers had to comply—or risk claim delays and denials that had nothing to do with the quality of care or the validity of the claim itself.
AB2499 inverts that burden. The law amends Health and Safety Code § 1371(a)(7)(A) to establish that health plans and insurers must be capable of accepting electronic documentation. More importantly, they cannot use system limitations as a reason to reject, delay, or pend a claim.
This matters because electronic submission reduces administrative work, speeds up processing, and cuts the back-office costs that eat into practice margins. Small medical practices and clinics—the backbone of California's health care delivery—have long absorbed the cost of maintaining dual submission systems or hiring staff to handle paper-based workflows that larger health systems can automate.
The law becomes operative on May 26, 2028. Before that date, the state Department of Managed Health Care has until December 31, 2027, to issue non-APA (non-Administrative Procedure Act) guidance and regulations. After that, any further rulemaking will follow the full APA process, which includes public comment periods and formal notice.
This two-phase approach gives payers time to upgrade their systems while giving providers clarity on what compliance looks like. It also signals that the state is serious about enforcement: non-APA guidance first, then formal rules.
If your practice currently submits claims electronically to any California health plan or insurer, document which payers accept electronic submission and which ones don't. Keep records of any claims that were delayed or pended due to format or system issues. When the law takes effect, you'll have a clear baseline for what should change.
If you're still submitting paper claims to some payers, begin conversations with your billing staff or vendors about electronic submission capabilities. By May 2028, you'll have a legal right to use them—and payers will have a legal obligation to accept them.
For a detailed breakdown of AB2499's claims-payment provisions and how they apply to your specific service type, contact your state or local health care trade association.