Glossary · Billing

Timely filing

Timely filing is the deadline by which a claim must be submitted to a payer after the date of service. Missing this deadline results in a permanent, non-appealable denial with no path to reimbursement.

Verified May 8, 2026 · 5 sources ↓

Drawn from CMSAdscRcmexpertsHealthinfoservice

Definition

Source · Editorial summary grounded in 5 cited references ↓

Every payer—Medicare, Medicaid, and commercial insurers—sets a contractual or regulatory window within which claims must be received. For Medicare, that window is one calendar year from the date of service. Commercial payers vary widely, with deadlines ranging from 90 days to 24 months depending on the contract. The clock typically starts on the date of service, though some payers allow the window to begin from the date of discharge or the date a corrected claim is required.

In orthopedics, timely filing is a practical risk because the billing cycle is frequently interrupted. Surgery scheduling delays, global period confusion, workers' compensation coordination-of-benefits disputes, prior authorization rework, and multi-payer sequencing on personal injury cases all create gaps between the date of service and the date a clean claim is ready to submit. Each of those gaps eats into the filing window without anyone necessarily tracking it.

When a claim is denied for timely filing, the denial is almost always final. Unlike medical necessity or coding denials—which can be corrected and resubmitted—a timely filing denial cannot be cured by fixing the claim. The only recourse is an appeal with documented evidence that the claim was originally submitted on time but rejected for a technical reason, or that an exception applies. Those exceptions are narrow and payer-specific. In practice, a timely filing denial means the service is written off.

Why it matters

A timely filing denial cannot be billed to the patient for Medicare and most commercial contracts, meaning the revenue is lost entirely—not delayed, not recoverable through appeal, not transferable to the patient as a balance. For high-value orthopedic procedures such as total joint replacements, spinal fusions, or complex fracture repairs, a single missed filing deadline can represent tens of thousands of dollars in unrecoverable write-offs. Practices that lack automated claim-age tracking or that allow authorization rework and coordination-of-benefits disputes to stall submission without monitoring the deadline are quietly absorbing these losses without audit visibility.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Restarting the filing clock from the date of prior authorization approval or the date the operative report was finalized rather than from the actual date of service.
Assuming the Medicare 12-month window applies to all payers; some commercial contracts require submission within 90 or 180 days, and the contracted deadline—not Medicare's—controls.
Failing to track the filing deadline separately for each payer on multi-trauma or workers' compensation cases where primary and secondary payers are sequenced, leaving the secondary claim outside the window by the time the primary adjudicates.
Treating a returned or rejected claim as a submitted claim; a claim rejected at the clearinghouse or returned unprocessed has not been received by the payer and does not satisfy the filing deadline.
Allowing global period billing confusion to delay post-operative claim submission past the payer's window, particularly on staged or bilateral orthopedic procedures where the operative date and the billing date differ.
Not documenting the original submission date and method when a claim is resubmitted after a payer error or system outage; without that proof-of-timely-filing evidence, the appeal cannot succeed.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01What is the timely filing deadline for Medicare?

Medicare requires claims to be filed within one calendar year—12 months—of the date of service. This deadline is set by regulation and is uniform across all Medicare Administrative Contractors.

02Can a timely filing denial be appealed?

Rarely, and only under specific conditions. A successful appeal requires documented proof that the claim was submitted on time and returned or rejected by the payer for a reason outside the provider's control—such as a payer system outage or a payer-initiated error. A claim that was never submitted on time cannot be appealed on the merits of the service.

03Does a clearinghouse rejection stop the timely filing clock?

No. A claim rejected at the clearinghouse level was never received by the payer and does not satisfy the filing deadline. The clock continues running. Practices must resubmit the corrected claim and verify payer receipt before the deadline expires.

04When does the timely filing clock start for workers' compensation orthopedic claims?

Workers' compensation timely filing rules are state-specific and are not governed by Medicare or standard commercial payer rules. Deadlines vary from 90 days to several years depending on the state, and coordination-of-benefits disputes can create additional complexity. Each workers' compensation claim should be tracked against the applicable state rule.

05How do global surgery periods interact with timely filing?

The global surgical package does not extend the payer's timely filing window. Services that are separately billable outside the global period—such as staged procedures or unrelated E/M visits—must still be submitted within the payer's filing deadline calculated from each individual date of service, not from the primary surgical date.

06What documentation should a practice retain to support a timely filing appeal?

At minimum: the original submission date and method, the clearinghouse or payer acknowledgment confirming receipt, the electronic transaction ID or batch number, and any payer correspondence that caused a delay. Without this documentation, a timely filing appeal has no evidentiary basis.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

01
cms.gov
https://www.cms.gov/files/document/fy-2025-icd-10-cm-coding-guidelines.pdf
02
adsc.com
https://www.adsc.com/blog/orthopedic-billing-and-coding-a-practical-guide-for-2025
03
rcmexperts.us
https://rcmexperts.us/blog/orthopedic-billing-guidelines/
04
healthinfoservice.com
https://healthinfoservice.com/blog/the-complete-orthopedic-billing-and-coding-cheat-sheet/
05CMS Medicare Claims Processing Manual, Chapter 1 (General Billing Requirements) — https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/clm104c01.pdf

Mira AI Scribe

Mira flags the filing deadline at claim creation by pulling the date of service from the encounter record and cross-referencing the payer contract on file. For Medicare, the system marks claims approaching the 11-month threshold and escalates them to the billing queue. For commercial payers with shorter contractual windows, Mira uses the contracted deadline stored in the payer profile rather than defaulting to Medicare's 12-month rule. On multi-payer cases—workers' compensation, personal injury, or Medicare-plus-commercial coordination of benefits—Mira tracks the filing window for each payer independently, so the secondary submission deadline is monitored in parallel with primary adjudication rather than sequentially. If the primary claim's adjudication timeline would leave fewer than 30 days before the secondary payer's filing deadline, Mira surfaces an alert. Mira also distinguishes between a clearinghouse rejection (claim not received by payer) and a payer denial (claim received and adjudicated). A rejected claim resets the submission attempt but does not extend the filing window, and Mira maintains the original submission date in the claim record to support proof-of-timely-filing documentation if an appeal becomes necessary.

See Mira's approach

Related terms

Prior authorization Billing

Prior authorization (PA) is a payer requirement that a provider obtain approval before delivering a specific service, procedure, or item—otherwise the claim will be denied regardless of medical necessity. Approval is granted when submitted clinical documentation meets the payer's coverage criteria.