Humana Medicare Advantage requires initial claims to be filed within 365 days (one year) of the date of service. If Humana denies a claim, providers have 65 calendar days from the denial date to file a reconsideration. Expedited appeals must be decided within 72 hours. These windows apply to most Humana MA plans — your provider contract may specify a shorter filing window, so verify before billing.
Humana Medicare Advantage Timely Filing Deadlines
Timely filing denials — coded as CO-29 on remittances — are among the most preventable revenue losses in medical billing. For Humana Medicare Advantage plans, CMS sets the minimum filing window at 12 months, and Humana's official claims policy matches that floor.
According to Humana's provider portal at provider.humana.com, claims must be submitted "within one year from the date of service or as stipulated in the provider agreement." That qualifier matters: some contracted Humana MA agreements specify shorter windows (90 or 180 days). If your practice recently re-contracted with Humana — particularly following their 2026 MA market exits — verify the timely filing clause in your specific agreement.
For commercial Humana employer plans, the default window drops to 90 days from date of service unless your state mandates otherwise or your contract specifies a longer period.
Check Your Contract First
CMS requires Humana to allow at least 365 days for MA claims, but individual provider agreements can legally specify a shorter window. If you re-contracted with Humana for 2026 (many providers did due to plan exits and reconfigurations), confirm your timely filing clause before assuming the one-year floor applies.
Timely Filing Deadlines by Plan Type
The table below covers Humana's standard timely filing windows across plan types. These reflect Humana's published policies and CMS minimums — always verify against your specific provider agreement.
| Plan Type | Initial Claim Filing Window | Notes |
|---|---|---|
| Medicare Advantage (Part C) | 365 days from date of service | CMS minimum; contract may specify shorter |
| Commercial / Employer Plans | 90 days from date of service | Default; state law or contract may extend |
| Humana Medicaid (TriCare-linked) | Varies by state contract | Check state-specific Humana Medicaid manual |
| Part D (Pharmacy) | Governed by pharmacy PBM contract | Separate from medical claim submission |
For most independent practices billing Humana Medicare Advantage, the controlling deadline is 365 days from date of service. Practices billing Humana commercial lines should default to 90 days unless the contract says otherwise.
Humana Appeal and Reconsideration Deadlines
A timely filing denial is not always the end. If you receive a CO-29 denial and have documentation proving the claim was submitted on time, you can appeal it. Humana's appeal window and decision timelines are set by CMS for Part C plans.
According to Humana's Reconsiderations and Appeals page (provider.humana.com/coverage-claims/payment-integrity/reconsiderations-appeals):
| Appeal Level | Filing Deadline | Humana Decision Timeframe | Submission Method |
|---|---|---|---|
| Level 1 — Provider Reconsideration | 65 calendar days from denial date | 30 days (standard) | Availity Essentials or mail |
| Expedited Reconsideration | No separate deadline — request at Level 1 | 72 hours from request | Phone + written follow-up |
| Level 2 — IRE Review | Auto-escalated if Level 1 denied | 60 days (standard) | Auto-forwarded by Humana |
| External Review (State/Federal) | Varies by state law | 45 days typical | State-specific process |
The 65-day window starts from the date on the denial notice, not the date you received it. Open denial correspondence immediately — delays in your mail room can eat into this window.
Level 2 Is Automatic
If Humana upholds its denial at Level 1, the case automatically forwards to an Independent Review Entity (IRE). You do not need to file a separate Level 2 appeal. The IRE reviews the case independently from Humana.
How to Submit a Humana Reconsideration
Humana accepts provider reconsiderations through two primary channels:
Online (Preferred): Submit through Availity Essentials or directly at resolutions.humana.com. The online portal provides a submission confirmation and case tracking number.
Mail:
Humana Inc.
P.O. Box 14165
Lexington, KY 40512-4165
Puerto Rico providers:
Humana Inc.
Unidad de Querellas y Apelaciones
P.O. Box 195560
San Juan, PR 00919-5560
Provider Customer Service (timely filing exceptions): 800-457-4708, Monday–Friday, 8am–8pm ET.
Required documents for any CO-29 reconsideration:
- Copy of the original claim
- Remittance notification showing the CO-29 denial
- Proof of timely submission (see section below)
- Clinical records if the appeal also involves medical necessity
- Signed Waiver of Liability form (holds the enrollee harmless)
Fighting CO-29 Denials: Proof of Timely Filing
A CO-29 denial is effectively non-appealable without documentation proving the claim was submitted within the filing window. Humana does not make exceptions based on goodwill — you need a paper trail.
What counts as proof:
- Electronic submissions: A 277CA transaction acceptance report or clearinghouse batch confirmation with a timestamp showing the submission date. This is the gold standard and should be archived for every claim.
- Paper/fax submissions: Certified mail receipt with postmark date, or a fax confirmation sheet showing the date, time, page count, and recipient fax number.
- Portal submissions: A submission confirmation email or screenshot from Availity showing the filed date.
Store Your 277CA Reports
If you submit electronically, your clearinghouse generates a 277CA claim acknowledgment for every batch. These reports are your primary defense against CO-29 denials. Store them for at least 7 years — many practices only keep them 90 days and lose the ability to appeal.
Timely Filing Exceptions Humana Recognizes
Even when a claim falls outside the standard window, Humana recognizes several documented exceptions that can allow late submission or appeal approval:
Retroactive eligibility: If the member's Humana MA coverage was not yet confirmed at the time of service but was later applied retroactively, the filing window runs from the date eligibility was established — not the date of service. Include the retroactive enrollment confirmation from Humana with your appeal.
Coordination of Benefits (COB): For claims where Humana is the secondary payer, the timely filing window runs from the date of the primary payer's Explanation of Benefits (EOB), not the service date. Attach the primary payer's remittance showing the payment date.
Payer or clearinghouse error: If Humana's systems or a clearinghouse error caused the delay — documented by a rejection log or Humana correspondence — that period can be excluded from the filing window.
Federal disaster declarations: FEMA-declared disaster areas trigger automatic extensions for practices in affected regions. CMS issues guidance during these events.
For exception appeals, submit a cover letter identifying the specific exception category, the documentation supporting it, and the relevant timeline. Call 800-457-4708 to flag the case for escalation to Provider Relations if the front-line representative cannot approve it.
2026 Context: What Changed with Humana MA
Humana executed significant Medicare Advantage market contractions for 2026, exiting multiple counties and plan types. Key implications for timely filing:
- Re-contracted providers: If your Humana MA agreement was re-papered for 2026, your timely filing clause may have changed. Verify before assuming the prior contract terms carry over.
- Reduced prior authorization requirements: Humana reduced its 2026 MA prior auth requirements for certain services, which may decrease the volume of denied claims — but does not change timely filing rules.
- No CMS policy change to MA timely filing windows: CMS did not modify the minimum 365-day filing requirement for 2026 MA plans. The one-year floor remains in effect.
For broader context on how Humana's denial rates compare to other major payers, see Insurance Denial Rates by Company 2026.
How Muni Appeals Helps with Humana Timely Filing Denials
CO-29 denials are preventable and recoverable — but only if your billing workflow captures the right documentation at the right time and your reconsideration is filed within 65 days.
Muni Appeals automates the Humana reconsideration workflow:
- Flags CO-29 denials from Humana MA remittances automatically
- Tracks the 65-day appeal window per denial so nothing ages out
- Pulls 277CA confirmation data to attach proof of timely filing
- Generates Humana-specific reconsideration letters with the correct mailing address and documentation checklist
- Monitors the reconsideration status through the Availity portal
Frequently Asked Questions
What is the Humana Medicare Advantage timely filing limit?
Humana requires initial claims to be filed within 365 days (one year) of the date of service, consistent with CMS's minimum requirement for Medicare Advantage plans. Individual provider agreements may specify a shorter window — verify your contract.
What is the Humana appeal deadline after a denial?
Providers have 65 calendar days from the date on the denial notice to file a Level 1 reconsideration with Humana. The clock starts from the denial date, not the date you received the letter. Humana must issue a standard Part C reconsideration decision within 30 days.
What is a CO-29 denial from Humana?
CO-29 is the standard Claim Adjustment Reason Code for timely filing denials — it means the claim was submitted after the contractual or regulatory filing deadline. To appeal a CO-29 from Humana, you need documented proof that the claim was submitted within the window (typically a clearinghouse acceptance report).
Can Humana deny an appeal because of timely filing?
Yes, if your appeal is filed after the 65-calendar-day reconsideration deadline, Humana can deny it on timeliness grounds. The 65-day window starts from the date of the denial notice, not the date you appeal. File as soon as you receive a denial.
Does Humana have a timely filing exception for retroactive eligibility?
Yes. If the member's Humana coverage was applied retroactively after the service date, the filing window runs from the date eligibility was confirmed, not the service date. Include the retroactive enrollment documentation from Humana with the claim or appeal.
How do I prove timely filing to Humana?
The best documentation is a 277CA clearinghouse acknowledgment report with a timestamp showing your submission date within the filing window. For fax or mail submissions, use a certified mail receipt or fax confirmation sheet. For portal submissions, a confirmation email or screenshot showing the submission date is sufficient.
Where do I mail a Humana Medicare Advantage reconsideration?
Mail appeals to: Humana Inc., P.O. Box 14165, Lexington, KY 40512-4165. Online submission through Availity Essentials or resolutions.humana.com is preferred — it provides a case number and delivery confirmation.
Is Humana's timely filing limit the same for commercial plans?
No. Humana's default timely filing window for commercial employer plans is 90 days from date of service, compared to 365 days for Medicare Advantage. State mandates or contract terms can extend the commercial window. Always check the plan type before billing.
Ready to Stop Losing Revenue to CO-29 Denials?
Timely filing denials are recoverable — but only within a fixed window. For Humana MA, that window is 65 days from denial date. After that, the claim is gone.
Get Started:
- Automated CO-29 denial detection from Humana remittances
- 65-day reconsideration deadline tracking per claim
- Humana-specific appeal letter generation with correct mailing addresses
- Proof-of-filing documentation attached automatically
- Integrated status tracking through Availity
This guide reflects 2026 Humana Medicare Advantage timely filing policies based on Humana's published provider portal guidance (provider.humana.com) and CMS Medicare Advantage regulations. Individual provider agreements may specify different timely filing windows. Verify your specific contract terms before relying on the general deadlines above. State requirements may also vary. For related Humana appeal guidance, see our Humana Appeal Letter Template 2026 and Humana Medical Necessity Letter Template 2026.