Timely filing limits: how to stop losing claims to deadlines

What timely filing limits are

A timely filing limit is the deadline a payer sets for receiving a claim, usually counted from the date of service. If the claim arrives after the deadline, the payer can deny it, and for in-network claims the contract usually bars you from billing the patient for it. That makes a timely filing denial one of the most expensive denials there is: the work was done, and the money is gone.

For Medicare, claims must be filed within 12 months, or one calendar year, from the date of service. Medicaid and commercial deadlines vary by state, by plan and by contract. Many commercial plans use limits shorter than Medicare’s, sometimes 90 or 180 days, so you need to check each payer contract and provider manual instead of assuming one rule.

Timely filing limits by payer type

Medicare

Traditional Medicare requires claims within 12 months of the date of service. Medicare allows a small number of exceptions, such as administrative errors by Medicare itself or retroactive Medicare entitlement, but you shouldn’t plan around them.

Medicare Advantage

Medicare Advantage plans are run by private insurers and can set their own deadlines in their provider contracts. Don’t assume the traditional Medicare rule applies.

Medicaid

Each state sets its own Medicaid filing limit, and Medicaid managed care plans in the same state may use different limits again. Check the state program and each managed care contract you hold.

Commercial payers

Commercial deadlines are set in your contract or the payer’s provider manual, and they can differ between plans from the same company. Some states also have laws that affect commercial filing limits. Your contract is the source to trust.

Secondary claims

Secondary payers often count their deadline from the date the primary payer processed the claim, not the date of service. Check how each secondary payer counts it, because a slow primary payer can eat into the window.

Corrected claims and appeals have their own deadlines

The original filing deadline is only the first one. Most payers also set separate windows for:

• Corrected or replacement claims, often counted from the date of the original payment or denial.
• Reconsiderations and appeals, which commonly have their own limits counted from the date on the denial notice. For Medicare, a first-level appeal (redetermination) must be filed within 120 days of receiving the initial determination.
• Refund and recoupment disputes, which usually have short response windows.

A claim that went out on time can still be lost if the denial sits unworked until the appeal window closes. See how to appeal a denied claim for how appeal deadlines fit into the process.

Why practices miss filing deadlines

• Charges entered late. Unsigned notes and delayed charge entry hold claims back before they’re ever built.
• Rejections nobody saw. A claim rejected by the clearinghouse never reached the payer. If the rejection isn’t worked, the claim was never filed, even though the practice thinks it was.
• Wrong payer on file. Billing the wrong insurer, or the wrong order of coverage, uses up time before the right payer receives the claim.
• Credentialing delays. Claims held while a new provider’s enrollment is pending can age past the deadline. Our post on credentialing new providers covers how to plan for this.
• Old A/R that nobody owns. When claims past 90 days have no one assigned to them, deadlines pass without anyone noticing.

Proof of timely filing

If a payer denies a claim for timely filing and you believe it was sent on time, you’ll usually need proof. Acceptable proof varies by payer, but it commonly includes:

• A clearinghouse acceptance report showing the payer received the claim, with the date.
• An earlier remittance or correspondence from the payer about the same claim.
• A payer acknowledgment report or claim number issued before the deadline.

A screenshot from your own billing system showing the claim was created usually isn’t enough. What counts is evidence the payer received it. Keep clearinghouse reports long enough to cover your longest appeal window.

A workflow that prevents timely filing denials

1. Build a deadline table. List every payer you bill, with its original filing limit, corrected claim limit and appeal limit, taken from your contracts and provider manuals. Review it every year.
2. Set a charge lag target. Aim to have charges entered within a few days of the visit, and track unsigned notes as part of the billing process.
3. Work clearinghouse rejections daily. A rejection is a claim that hasn’t been filed. Treat it that way.
4. Confirm payer acceptance. Check acceptance reports, not just submission reports, so you know the claim arrived.
5. Flag claims approaching their deadline. Run a weekly report of unpaid claims within 30 to 60 days of their payer’s limit and work those first.
6. Assign old A/R to a person. Every claim over 90 days should have an owner and a next action date.
7. Track timely filing write-offs separately. Use their own adjustment code so the loss shows up in your reports instead of hiding as a contractual adjustment.

Our claims and denial management service tracks payer deadlines for every claim, and our A/R recovery service works aging claims before their windows close.

What to do after a timely filing denial

Not every timely filing denial is final. Before writing one off, work through these steps:

1. Check the dates. Confirm the date of service, the payer’s limit and the date the payer actually received the claim. Payers sometimes apply the wrong limit or count from the wrong date.
2. Look for proof. Pull clearinghouse acceptance reports and any earlier correspondence for the claim. If the payer received an earlier version on time, the denial may be overturned.
3. Check for a payer error. If the delay came from the payer, such as a claim returned for a reason that turned out to be wrong, many payers will reconsider.
4. Check coordination of benefits. If another payer was billed first in good faith, the deadline for the correct payer may run from that payer’s response. Rules vary, so check the contract.
5. Appeal in writing. Send the proof with a short letter that states the dates clearly. Follow the payer’s appeal process and deadline.
6. Record the cause. If the denial is upheld, write it off with a timely filing adjustment code and note the reason, so the same gap can be closed.

If timely filing write-offs show up every month, treat them as a process problem rather than bad luck. They almost always trace back to one of the causes above.

Find claims close to their deadline

If you don’t know how many of your unpaid claims are near their filing or appeal limit, that’s worth finding out quickly. Our free A/R audit lists aging claims by payer and deadline so you can work the most urgent ones first. Request your free A/R audit. You keep the findings whether or not you hire us.