Reasonable Excuse and the 45-Day Rule: Why Clerical Error Won't Save a Misdirected No-Fault Claim

Key Takeaways

• A provider that mails NF-3 forms to the wrong insurer must offer a reasonable justification to excuse the late submission to the correct one.
• In Karina K. Acupuncture v Hertz, the excuse failed because the provider’s own NF-3 forms showed it knew which carrier the claims belonged to.
• Clerical error alone will not suffice as a reasonable excuse under the 45-day rule.
• Carriers should still issue denials that advise the claimant that late notice will be excused on reasonable justification — and providers should submit that justification promptly.

New York’s no-fault insurance system requires healthcare providers to submit claims within strict timeframes and to the correct insurance company. When providers send their NF-3 forms to the wrong insurer, they must demonstrate a reasonable excuse to avoid dismissal of their claims. A recent appellate decision illustrates just how difficult it can be to establish such justification when the error appears to be purely clerical.

The case highlights the importance of careful attention to procedural requirements in no-fault claims. While providers may sometimes receive relief for late submissions under certain circumstances, as discussed in our analysis of due consideration requirements, courts take a strict approach when evaluating whether mistakes justify non-compliance with basic filing requirements.

The Decision

Jason Tenenbaum’s Analysis:

Karina K. Acupuncture, P.C. v Hertz Claim Mgt. Corp., 2018 NY Slip Op 51762(U)(App. Term 2d Dept. 2018)

“Plaintiff failed to demonstrate a reasonable justification for initially sending the NF-3 forms to GEICO rather than to defendant, as plaintiff’s NF-3 forms indicate that plaintiff was aware that the claims were to be sent to defendant. Since plaintiff failed to demonstrate the existence of a triable issue of fact, the branch of defendant’s motion seeking summary judgment dismissing so much of the complaint as sought to recover for services rendered between July 6, 2007 and November 28, 2007 should have been granted.”

Clerical error will not suffice on a 45-day claim.

The 45-Day Rule in Context

Under the no-fault regulation (11 NYCRR 65-1.1), a provider’s proof of claim — typically the NF-3 verification of treatment form — must be submitted to the insurer within 45 days of the date services are rendered. The regulation softens that deadline in one respect: a late submission may be excused where the applicant provides a reasonable justification for the delay (11 NYCRR 65-3.3(e)), and the insurer’s denial is supposed to advise the claimant of that opportunity.

What counts as reasonable justification is litigated constantly. Sending the bills to the wrong carrier is one of the recurring fact patterns. A provider in that position is effectively asking the court to treat the misdirected mailing as the kind of excusable mistake the regulation contemplates. Karina K. Acupuncture shows where the Appellate Term draws the line: when the provider’s own claim forms identify the correct insurer, the provider cannot plausibly claim confusion about where the bills belonged. The error is unexplained, and an unexplained clerical error is no justification at all.

Why This Matters for Providers and Carriers

For medical providers and their billing departments, the decision is a warning that the 45-day rule punishes back-office sloppiness with full forfeiture of the claim. Billing software that defaults to a previously used carrier, or staff who pull the wrong file, can erase months of legitimate treatment revenue. The window for damage control is short: once the misdirection is discovered, the bills should go out to the correct carrier immediately, accompanied by a written explanation of what happened and why — because the justification, not just the resubmission, is what the regulation requires.

For no-fault carriers, the case validates a familiar defense posture. A denial premised on the 45-day rule, coupled with proof that the provider knew the correct carrier from the outset, will support summary judgment where the provider’s excuse boils down to “we made a mistake.” The decision also fits the broader theme running through proof-of-mailing and claim-submission disputes in no-fault litigation: the side with disciplined, documented mailing practices usually wins the procedural fight.

For injured people who assigned their benefits, the stakes are mostly invisible but real — a provider that forfeits its no-fault claim may look to other recovery routes, so the system works best when bills go to the right carrier the first time.

Practice Pointers

• Verify the carrier before billing. The police report, the NF-2 application, and the assignment package should all be cross-checked against the billing system entry.
• Move fast after discovering an error. Resubmit to the correct carrier immediately and include a contemporaneous written justification for the delay.
• Document the explanation. A justification that surfaces for the first time in motion practice, contradicted by the provider’s own NF-3 forms, will fail — as it did here.
• Carriers: Preserve the 45-day defense by issuing a timely denial that invites reasonable justification, then hold the provider to the regulation’s standard.

Frequently Asked Questions

What is the 45-day rule in New York no-fault insurance?

The no-fault regulation requires a provider’s proof of claim to be submitted to the insurer within 45 days of the date health services are rendered. Claims submitted later may be denied unless the provider supplies a reasonable justification for the delay.

Is sending the claim to the wrong insurance company a reasonable excuse?

Not by itself. In Karina K. Acupuncture v Hertz Claim Mgt. Corp., the Appellate Term held the provider had no reasonable justification for sending its NF-3 forms to GEICO instead of the correct carrier, because the forms themselves showed the provider knew where the claims should go. Pure clerical error will not excuse a late 45-day submission.

What should a provider do after discovering bills went to the wrong carrier?

Resubmit the claims to the correct insurer immediately and include a written, contemporaneous explanation of the error. The regulation excuses late submissions only on reasonable justification, so the explanation needs to be concrete and credible — not an after-the-fact label of “clerical error.”

Related Resources

• Proof of mailing and service in no-fault cases — the firm’s cluster hub on mailing and proof of service
• The firm’s Legal Encyclopedia
• No-Fault Defense practice page
• Timely notice
• Late written notice not excused
• Insufficient excuse
• No reasonable excuse found