Cigna's timely filing limit is 90 days for in-network providers, 180 days for out-of-network. Appeal deadlines are 180 days for commercial plans and 65 days for Medicare Advantage. COB claims: 90 days from the primary EOB. California exception: 365 days. Timely filing denials (CO-29) can be appealed with proof of original submission. State law may override these limits.
Why Cigna's Timely Filing Limits Confuse Independent Practices
Cigna's timely filing rules are among the most misunderstood in medical billing — and the most costly to get wrong.
The core problem: Cigna uses different deadlines depending on your network status, plan type, and state. An in-network practice treating a commercial plan patient has 90 days to submit. The same practice billing Medicare Advantage has until the end of the following calendar year. An out-of-network provider has 180 days. Miss any of these deadlines and Cigna issues a CO-29 denial — and the revenue is gone unless you appeal.
For independent practices already stretched thin on administrative bandwidth, this complexity is deliberate. Cigna denies approximately 20-23% of claims industry-wide, and timely filing denials are among the most avoidable — and most frequently left unappealed. Practices that don't track these windows lose $25,000-$75,000 annually in claims that were legitimately payable.
This guide breaks down every Cigna timely filing deadline by plan type, explains how to appeal a CO-29 denial, and tells you exactly what to do when you've missed the window.
Cigna Claim Submission Timely Filing Limits by Plan Type
| Plan Type | Timely Filing Limit | Clock Starts | Notes |
|---|---|---|---|
| Commercial — In-Network (Participating) | 90 days (3 months) | Date of service | Most common; your provider contract may specify longer |
| Commercial — Out-of-Network | 180 days (6 months) | Date of service | Standard for non-par providers |
| Behavioral Health (Cigna BH) | 90 days | Date of service | 60-day contractual requirement with 30-day grace period |
| Medicare Advantage (Cigna HealthCare for Seniors) | End of calendar year following year of service | Date of service | Services Oct–Dec get additional full year extension |
| Medicare Secondary Payer (MSP) | 90 days | Date of primary carrier's EOB | Filing clock starts from primary EOB, not service date |
| Coordination of Benefits (COB) | 90 days | Date of primary carrier's EOB | Cigna as secondary: attach primary EOB with claim |
| California (state law override) | 365 days | Date of service | State law supersedes Cigna's 90-day commercial limit |
In-Network Contract May Differ
Your individual Cigna provider agreement may specify a timely filing window that differs from the standard 90 days. Always check your contract language. Cigna's administrative guidelines are a floor, not a ceiling — contracts can provide more time, but rarely less.
Understanding the Medicare Advantage Exception
Cigna's Medicare Advantage timely filing window is unusually generous compared to its commercial rules. Non-participating providers have 15 to 27 months to submit new claims, depending on when in the year services were rendered:
- Services January–September: Claims must be submitted by December 31 of the following year
- Services October–December: The deadline extends an additional full calendar year (making the effective window up to 27 months)
This extended window exists because Medicare-coordinated claims are subject to CMS regulations, not just Cigna's internal policies.
Cigna Appeal Timely Filing Limits
Getting denied doesn't mean the revenue is lost — but only if you appeal in time. Cigna's appeal timely filing limits are separate and distinct from the claim submission limits above.
| Plan Type | Level 1 Appeal Deadline | Level 2 Appeal Deadline | External / Arbitration |
|---|---|---|---|
| Commercial — All Plans | 180 days from initial denial or last payment adjustment | 60 days from Level 1 decision | 1 year from Level 1 denial letter |
| Medicare Advantage (Level 1 — Organization Determination) | 180 days from denial notice | 60 days from Level 1 decision | N/A (IRO review available separately) |
| Medicare Part D | 60 days from denial | N/A | IRO review available |
| Medicaid Managed Care | 60 days from denial | Varies by state | State-specific external review |
| California — All Plans | 365 days from denial | N/A | Dispute resolution within 75 business days |
Appeal Decision Timelines
Once you submit your appeal, Cigna has a set window to respond:
- Commercial standard appeals: 60-day review period; written notification within 75 business days of receipt
- Medicare Advantage Level 1: 30-day decision timeline
- Medicare Advantage Level 2: 30-day decision timeline
- Expedited appeals (urgent/emergent): 72-hour decision required
- California HMO/POS plans: Acknowledgment within 15 business days; determination within 45 business days
Arbitration After Internal Appeals
If your internal appeal is denied, you can pursue external dispute resolution (arbitration) within one year of the Single Level denial letter. This is separate from state external review processes available to patients and not typically the provider's first choice — but it is an option if internal exhaustion fails.
How to Appeal a Cigna CO-29 Timely Filing Denial
A CO-29 denial code means Cigna rejected your claim because it was submitted after the timely filing window. This is one of the most common — and most winnable — denial types when you have the right documentation.
Step 1: Confirm the Applicable Filing Window
Before starting your appeal, verify which timely filing limit actually applied to this claim:
- In-network commercial: Was your 90-day window measured correctly from the date of service?
- COB claim: Did you file within 90 days of the primary carrier's EOB (not the date of service)?
- Medicare Advantage: Was the service date in the last calendar quarter (Oct–Dec), giving you the extended window?
- California practice: Does state law's 365-day window apply?
Cigna's CO-29 denials are sometimes issued in error — particularly on COB claims where billers mistakenly use the service date instead of the primary EOB date as the clock start. Confirming this first can resolve the denial without a formal appeal.
Step 2: Gather Proof of Timely Filing
The only way to win a CO-29 appeal is to prove the original claim was submitted on time. Acceptable proof includes:
- Electronic Data Interchange (EDI) clearinghouse acknowledgment report — shows the date and time your claim was accepted for transmission
- Payer acknowledgment/acceptance receipt — the confirmation Cigna or its clearinghouse returned when it received your claim
- Certified mail return receipt — for paper claims sent by mail
- Clearinghouse audit trail — transaction logs with timestamps
- Practice management system submission report — if your PMS generates claim submission histories with timestamps
Verbal Promises Are Not Proof
If a Cigna representative told you that your claim was received, that phone conversation is not documented proof. Always retain electronic submission confirmations. An EDI clearinghouse report is the gold standard for timely filing disputes.
Step 3: Complete the Request for Health Care Provider Payment Review
Download and complete Cigna's "Request for Health Care Professional Payment Review" form from CignaforHCP.com or at cigna.com. Select the timely filing denial box on the form.
Include with your appeal:
- Completed appeal form with denial reason checked
- Copy of the original claim (CMS-1500 or UB-04)
- Copy of the Explanation of Payment (EOP) / EOB showing the CO-29 denial
- Proof of timely filing (EDI report, clearinghouse acknowledgment)
- Brief narrative explaining the submission timeline
Step 4: Submit Within the Appeal Deadline
Mail your complete appeal package to:
Commercial plans: Cigna National Appeals Unit P.O. Box 188011 Chattanooga, TN 37422
Medicare Advantage plans: Cigna Medicare Advantage Appeals P.O. Box 188085 Chattanooga, TN 37422
California providers: Cigna HealthCare of California, Inc. National Appeals Unit P.O. Box 188011 Chattanooga, TN 37422
You can also submit online through CignaforHCP.com if you have reconsideration entitlement access.
Step 5: Track and Follow Up
Cigna must respond to commercial appeals within 75 business days. Track your submission with a certified mail return receipt or keep the EDI confirmation of your electronic appeal. If you don't receive a decision within 80 business days, call the provider line at 1-800-88CIGNA (882-4462) to request a status update.
What To Do When You've Already Missed Cigna's Deadline
Missing a timely filing deadline doesn't automatically close every door. Here's what to check before writing off the claim:
1. Check if COB rules give you more time. If Cigna is secondary and you filed with the primary payer on time, your timely filing clock with Cigna starts from the primary's EOB date — not the date of service. Even if the date of service was 9 months ago, you may still be within the 90-day COB window.
2. Verify state law applies. California providers have 365 days regardless of Cigna's contract terms. Other states may have similar protections. Check your state's insurance commissioner guidance.
3. Request a real-time claim adjustment. Before filing a formal appeal, call Cigna Customer Service at 1-800-882-4462. For simple processing errors or initial claim submission issues, Cigna can sometimes make real-time adjustments without requiring a written appeal.
4. Document extraordinary circumstances. Cigna may grant extensions for extraordinary circumstances that prevented timely filing — natural disasters, practice disruptions, system failures. These exceptions are narrow but real. Submit a written request explaining the circumstance with supporting documentation.
5. Balance billing is prohibited. Even if the claim is ultimately not paid due to timely filing, Cigna's provider agreements prohibit balance billing patients for timely filing denials. The loss stays with the practice, not the patient.
Missed Deadline = Lost Revenue, Not Patient Responsibility
If Cigna denies a claim for timely filing and your appeal fails, you cannot bill the patient the difference. Your provider agreement prohibits balance billing for timely filing denials. This is why preventing these denials — not recovering them — is the priority.
How to Prevent Timely Filing Denials Before They Happen
The best timely filing strategy is prevention. These are the systems independent practices use to avoid CO-29 denials entirely:
Set hard internal deadlines shorter than Cigna's. If Cigna's window is 90 days, your internal deadline should be 60 days. If the window is 180 days, work by 90 days. This gives you buffer for re-submissions if the initial claim is rejected or returned.
Track claim submission confirmations systematically. Every claim submitted electronically should generate a clearinghouse acknowledgment. Store these in your practice management system tied to the claim record. You should never have to scramble for proof of timely filing.
Reconcile rejected claims within 48 hours. Electronic claims returned with "rejected" status are not "submitted" — they haven't reached Cigna. Rejected ≠ received. Your 90-day clock hasn't started, and if you wait to reconcile rejections, you may burn your filing window.
Flag COB claims immediately. When a patient has Cigna as secondary, mark the claim for COB tracking the moment you identify secondary coverage. These claims have different clock start dates and need separate tracking.
Build a denial dashboard. Practices with a weekly denial review catch CO-29s early enough to appeal within the 180-day window. Practices without one often discover them at 200+ days, after the appeal window has closed.
State-Specific Exceptions to Cigna's Timely Filing Rules
State insurance laws can override Cigna's contractual timely filing requirements. Cigna's own policy states that "state legislation and/or plan-specific language supersede Cigna Healthcare administrative guidelines."
California: 365 days from date of denial for all commercial plans — nearly four times longer than Cigna's standard 90-day commercial limit. California also requires dispute resolution decisions within 45 business days for HMO/POS plans.
New York: State law provides additional protections for claim submission timelines, particularly for Medicaid and managed care plans.
Other states: Timely filing requirements vary significantly. Always check your state insurance commissioner's guidance and review the state-specific addendum in your Cigna provider agreement.
If you're billing a self-insured (ERISA) employer plan, state laws typically do not apply — ERISA preempts state insurance regulations. For ERISA plans, Cigna's contractual deadlines govern.
Stop Losing Revenue to Cigna Timely Filing Denials
Independent practices using manual billing workflows lose an average of $47,000 annually in denied claims. Timely filing denials are among the most preventable — and the most consistently missed.
The problem is bandwidth. Your billing staff can't track separate deadlines for every Cigna plan type, manage COB exceptions, and reconcile clearinghouse rejections across hundreds of open claims simultaneously. Things fall through.
Muni Appeals automates the entire appeal workflow:
- Generates complete CO-29 timely filing appeal letters in 5 minutes
- Automatically compiles EDI submission proof and claim documentation
- Tracks appeal deadlines so you never miss the 180-day commercial window
- Handles both Level 1 and Level 2 Cigna appeals with plan-specific documentation
Independent practices using Muni Appeals achieve an 86% appeal overturn rate — compared to the 67% industry average for manual appeals. That 19-point difference translates to thousands of dollars per month in recovered revenue.
You can try Muni Appeals with 3 free appeals, no credit card required. Most practices recover their first denied claim within the free trial.
For Cigna-specific prior authorization appeals, see our Cigna prior authorization template guide. For help writing Cigna appeal letters, see our Cigna appeal letter template.
Frequently Asked Questions About Cigna Timely Filing
What is Cigna's timely filing limit for commercial plans?
Cigna's standard timely filing limit for in-network (participating) commercial plan providers is 90 days (3 months) from the date of service. Out-of-network providers have 180 days (6 months). Your specific provider agreement may specify a different window — check your contract.
What is Cigna's timely filing limit for Medicare Advantage?
For Cigna Medicare Advantage (Cigna HealthCare for Seniors), non-participating providers must submit claims by the end of the calendar year following the year in which services were provided. Services rendered in October–December receive an additional full calendar year extension, giving providers up to 27 months to file.
What is Cigna's appeal timely filing limit?
Cigna's appeal timely filing limit for commercial plans is 180 days from the date of the initial payment or denial notice. For Medicare Advantage, the Level 1 appeal deadline is 180 days; Level 2 is 60 days after the Level 1 decision. California providers have 365 days under state law.
What is a CO-29 denial code from Cigna?
CO-29 is the standard denial code meaning "the time limit for filing has expired." This code indicates Cigna rejected your claim because it was received after the applicable timely filing deadline. CO-29 denials can be appealed within 180 days if you have proof that the original claim was submitted on time.
Can I appeal a Cigna timely filing denial?
Yes. If you can prove the original claim was submitted within the timely filing window, you can appeal a CO-29 denial. Submit the "Request for Health Care Provider Payment Review" form along with your original submission confirmation (EDI clearinghouse report or certified mail receipt) to Cigna's National Appeals Unit within 180 days of the denial.
What counts as proof of timely filing for Cigna?
Cigna accepts: EDI clearinghouse acknowledgment reports with timestamps, electronic claim acceptance receipts, certified mail return receipts, practice management system submission audit trails, and primary carrier EOBs for COB claims. Verbal confirmation from a Cigna representative is not accepted as proof.
What happens if I miss Cigna's timely filing deadline?
If you miss the claim submission deadline and the appeal deadline, the claim is typically unrecoverable. You cannot balance-bill the patient — your provider agreement prohibits it. Check COB rules first (secondary claims: 90 days from primary EOB, not date of service), and verify whether your state's law provides a longer window.
Does Cigna make exceptions to timely filing limits?
Yes, in limited circumstances. Cigna may extend deadlines for extraordinary circumstances such as natural disasters, serious illness, or hospitalization that prevented timely submission. ERISA plans are exempt from state law overrides. COB situations have their own clock start rules that can provide additional time.
What is Cigna's timely filing limit for behavioral health claims?
Cigna Behavioral Health (CBH) requires claim submission within 60 days of service per the participating provider agreement, with a 30-day grace period. Claims not submitted within 90 days are denied. This is shorter than the standard 90-day commercial window and catches many practices by surprise.
How do I submit a Cigna timely filing appeal online?
Log into CignaforHCP.com and use the reconsideration/appeal function if your account has claims/reconsideration entitlement. You can also submit via Provider.Evernorth.com. For paper submission, mail the completed "Request for Health Care Provider Payment Review" form to the National Appeals Unit, P.O. Box 188011, Chattanooga, TN 37422.
Does Cigna's timely filing limit apply to ERISA plans?
Yes, for ERISA self-insured employer plans, Cigna's contractual timely filing deadlines apply, and state insurance laws do not override them. ERISA preempts state insurance regulations. For California providers billing ERISA-governed plans, the state's 365-day protection does not apply — Cigna's 90-day commercial deadline governs.
What is the Cigna provider appeal phone number?
The Cigna provider customer service number is 1-800-88CIGNA (1-800-882-4462). Use this line to attempt real-time claim adjustments before filing a formal written appeal. For complex timely filing disputes requiring written appeal, mail documentation to the National Appeals Unit rather than relying on phone resolution.
How long does Cigna take to decide a timely filing appeal?
Cigna must complete commercial appeal reviews within 60 days and notify you within 75 business days of receipt. Medicare Advantage Level 1 decisions come within 30 days. If you haven't received a decision within 80 business days, call the provider line to request a status update.
This guide reflects Cigna Healthcare's timely filing policies as of March 2026 based on publicly available provider resources at CignaforHCP.com. Individual provider agreements may specify different timely filing windows. State laws may extend or modify these deadlines. Verify current requirements directly with Cigna or in your provider contract before relying on any specific deadline. Policies change — particularly for Medicare Advantage plans subject to CMS annual regulation updates. This is not legal or billing advice.