Insurance Billing

Timely Filing Limits: The Deadline That Kills Nutrition Claims

Timely filing limits for dietitian claims: typical payer windows, why late filing is the one unfixable denial, and the simple system that prevents it.

By Alva Health Team · Published July 12, 2026 · ← All articles

Most claim denials are annoying. One is fatal. Deny a claim for a wrong code and you correct it; for a missing referral and you obtain one; for bad patient data and you fix a digit. Deny it for late filing and there is, in almost every case, nothing to correct, nobody to call, and no appeal that works. The money is simply gone — and your contract almost certainly bars you from billing the patient for your own missed deadline.

Timely filing is the quietest way a nutrition practice loses revenue, because the claims that die this way rarely look neglected. They look submitted. They sat in a rejection queue nobody checked, while a 90-day clock ran to zero.

Here's how the limits work, how claims silently miss them, and the two-habit system that makes this entire denial category disappear.

What timely filing is

Every payer contract includes a deadline for receiving claims, counted from the date of service. Miss it and the claim is denied — typically with a CARC 29 ("the time limit for filing has expired") on the ERA — regardless of how clean the claim is or how covered the service was.

Typical windows:

Treat every number above as a default to verify, not a rule to rely on. Your contract governs; some payers run 90 days, and a payer can be stricter than its own reputation. When you credential with a payer, record the filing limit next to the fee schedule — it's the same document.

One more nuance: the deadline is usually about when the payer receives a valid claim, not when you hit "submit." A claim your clearinghouse rejected was never received by anyone.

Why this is the one unfixable denial

Other denials are conversations. This one is arithmetic. The payer's position is simple: the contract gave you N days, the claim arrived on day N+30, denial upheld. There's no clinical argument to make, no code to swap, no documentation to attach — the content of the claim was never the problem.

And the contractual kicker: late filing is a provider write-off. Billing the patient for a claim you filed late is prohibited under standard network contracts. So unlike a non-covered service — where a signed financial policy lets you collect from the patient — a timely filing denial has no payer to pay it and no patient to bill. It's a 100% loss on care you fully delivered.

That's why, in our rundown of why nutrition claims get denied, timely filing is the only entry whose "fix" section is essentially empty.

How claims silently die: the rejection-queue trap

Nobody decides to file late. Claims miss the window through a specific, boring mechanism:

1. You submit a claim a few weeks after the session (busy month).
2. The clearinghouse or the payer's front end rejects it — a typo'd member ID, a missing NPI, a formatting error. Rejections aren't denials; the claim never entered processing, so no EOB or ERA is ever generated.
3. The rejection lands in a clearinghouse queue or status report you don't check weekly.
4. Months pass. In your billing software, the claim still says "submitted."
5. Someone finally notices, resubmits — and the corrected claim arrives past the window. Denial, CARC 29, write-off.

The payer never saw a valid claim inside the window, so as far as the contract is concerned, you never filed. This is the single most common path to a timely filing loss, and it's invisible until you go looking. If you've never read your clearinghouse rejection report, that's the first place lost revenue hides — our guide to reading ERAs and EOBs covers what the downstream paperwork should look like when claims flow properly.

Corrected claims and appeals have their own clocks

A detail that catches even careful billers: the original filing limit is not the only deadline in play.

• Corrected claims — many payers require corrections within a set window (commonly 60–180 days) from the original denial or remittance date.
• Appeals — separate window again, defined in the provider manual, often 90–180 days from the adverse decision.

So a claim filed on time, denied for a fixable reason, can still die of a missed deadline if the correction sits too long. The clock never fully stops until the claim is paid. Work every denial within days of the ERA — the appeal process is very winnable when you're inside the window and hopeless when you're not.

The one appeal that works: proof of timely filing

There is exactly one way to overturn a timely filing denial: prove the payer's premise wrong. If the claim was originally submitted in time and something downstream went sideways — the payer lost it, misrouted it, or you have an acceptance dated within the window — you can appeal with evidence:

• The clearinghouse acceptance report showing the claim was accepted (not just sent) with a date inside the window.
• A payer acknowledgment (277CA or portal confirmation) with a timely date.
• For secondary claims, the primary payer's EOB establishing your filing clock.

Submit a brief appeal letter, the proof, and the claim. These appeals succeed regularly, because the evidence is binary. But note what the evidence is: records that only exist if you keep and can retrieve your submission reports. A practice that never downloads its acceptance reports has no defense.

If the claim genuinely never went out in time — there's nothing to prove, and honest billers don't manufacture evidence. Write it off, and fix the system.

The prevention system: two habits

Everything above collapses into a system so simple it's almost disappointing:

Habit 1: submit within days, not weeks. File every claim within a few days of the session — ideally same-day or next-day. Early submission doesn't just prevent late filing directly; it buys you runway. A claim submitted on day 3 that gets rejected still has months of window left for fixes. A claim submitted on day 80 that gets rejected has almost none. Speed converts every later mistake from fatal to fixable.

Habit 2: work the rejection queue weekly. Every week, open your clearinghouse rejection/status report and clear it to zero. Every rejection is a claim the payer has not received — a claim whose clock is running with nothing on the scoreboard. Fifteen minutes a week closes the trapdoor that swallows entire months of revenue.

Add a third, cheap habit if you bill multiple payers: keep a one-page list of each payer's filing, corrected-claim, and appeal windows, captured at credentialing and verified annually.

None of this is skill. It's cadence — which is precisely why it fails in a solo practice during the busy months, when charting backs up and billing slides to "this weekend." The weeks you're most behind are the weeks the clock does its damage.

How Alva helps: Alva submits claims right after the session, tracks every claim's status so rejections surface immediately instead of dying in a queue, and keeps your filing runway measured in months instead of days. Automated submission, tracking, and payment posting for $99/month — start a 7-day free trial.