Oscar Health requires healthcare providers to submit initial claims within a defined timely filing window. This limit can vary depending on the provider’s contract and the type of claim being submitted.
Missing this deadline results in a claim denial. In most cases, the lost revenue cannot be recovered.
This guide covers everything you need to know about Oscar Health’s timely filing limit for 2026
Oscar Health Timely Filing Limit for Claims
In most cases, Oscar Health requires providers to submit initial claims within 90 days from the date of service. Appeals and requests for reconsideration carry a separate and tighter window. They must generally be filed within 60 days of the initial Explanation of Benefits (EOB). These limits can vary based on your participation agreement and the state in which your practice operates.
As a provider, you should review the timely filing limits stated in your Oscar Health participation agreement. Contract terms can override the standard published guidelines.
| Claim Type | Timely Filing Limit | Starting From |
| Standard Professional Claims | 90 days | Date of service |
| Electronic Claims (EDI) | 90 days | Date of service |
| Claims appeal / request for reconsideration | 60 days | Date of the initial EOB |
| Corrected or resubmitted claims | Within original 90-day window | Date of service |
How to Submit Claims to Oscar Health in 2026
| Submission Method | Details |
| Electronic (preferred) | Through Availity Essentials or via a contracted clearinghouse |
| Paper (CMS-1500 form) | For professional claims; mail to Oscar Health’s designated address |
| Institutional claims (UB-04) | Submit electronically via 837I transaction through clearinghouse |
| Claim attachments | Must be mailed or faxed separately with claim reference number |
Oscar Health Medicare Advantage Appeals Time Limit
Non-participating providers may file written appeals on disputed claims. For Oscar Health Medicare Advantage plans, non-participating providers have 60 calendar days from the date of the remittance advice to submit a written appeal.
In certain circumstances, Oscar Health may consider an appeal filed after the standard window. To request an extension, the provider must document a valid reason for the late filing. Oscar Health may also require a completed and signed Waiver of Liability Statement before reviewing the appeal. Contact Oscar Health’s Provider Service Center for the current form and instructions.
Once Oscar Health receives a completed appeal, it will issue a response within 60 calendar days.
How to File Oscar Health Medicare Advantage Appeals
Providers may submit written appeals by mail or fax. Include all supporting documentation and, where applicable, a completed Waiver of Liability Statement. Contact Oscar Health’s provider relations department for the current mailing address and fax number, as these may be updated periodically.
How Does Oscar Health Treat the Appeal?
After an appeal is submitted within the required window, Oscar Health reviews its initial claim decision. If payment remains denied after Oscar Health’s internal review, the appeal may be escalated to the Centres for Medicare & Medicaid Services Independent Review Entity (IRE) for an independent evaluation. Providers retain further appeal rights if the IRE upholds the denial.
Oscar Health Timely Filing Deadline for Appeals
When a claim is denied, providers have a limited window to request reconsideration or file a formal appeal. Missing these deadlines can result in the permanent loss of appeal rights.
| Appeal Type | Deadline |
| Request for reconsideration / appeal | Within 60 days of the date on the EOB |
| Peer-to-Peer discussion request | Within 14 days of the denial date |
| Medicare Advantage appeal (non-participating provider) | Within 60 days of remittance advice date |
To appeal a timely filing denial successfully, you typically need:
- Proof that the original claim was submitted on time (such as clearinghouse confirmation or an electronic acknowledgment receipt)
- A written explanation of why any delay occurred
- Supporting documentation for any exception being claimed
Oscar Health Timely Filing Limit for Corrected and Resubmitted Claims
Providers may need to submit a corrected claim to resolve coding errors, missing information, or other billing issues. The original claim must still have been submitted within Oscar Health’s timely filing window. Filing a corrected claim does not reset, extend, or restart the original filing deadline.
For example, if a provider submits a claim on day 60 of the 90-day window and it is rejected for a missing modifier, the provider may submit a corrected claim — but only 30 days remain in the original window. The corrected claim must reach Oscar Health before day 90.
How to Submit a Corrected Claim
| Scenario | What to Do |
| Corrected / Replacement Claim | Resubmit electronically via clearinghouse; reference the original claim number in the resubmission |
| Voided / Cancelled Claim | Submit a void transaction through your clearinghouse with the original claim number |
| Claim attachment needed | Mail or fax the attachment separately; note the submission method on the claim |
Tips to Never Miss Oscar Health’s Filing Deadline
- Submit claims within 30 to 45 days of the date of service
- Set calendar alerts for claims approaching the 60-day mark
- Register and submit through Availity Essentials or your contracted clearinghouse
- Save all electronic acknowledgment receipts and clearinghouse confirmations
- Review your provider contract to confirm your exact filing window
- Track corrected claims separately from original submissions
- Set an internal 30-day resubmission rule for any rejected claim
Has the Oscar Health Timely Filing Limit Changed in 2026?
As of 2026, Oscar Health has not announced a change to its standard timely filing window. The 90-day window for most commercial plans remains in effect.
However, providers should be aware of one operational update in 2026: Oscar Health has expanded its use of Availity Essentials for claims submission and status checks. Providers who have not yet registered on the Availity platform should do so promptly. Delays caused by portal registration issues do not qualify as valid exceptions to the timely filing rule.
Frequently Asked Questions
What is Oscar Health’s timely filing limit in 2026?
For most initial claims, the standard timely filing window is 90 days from the date of service. Some contracts specify a different window. Always verify the deadline in your participation agreement before submitting.
When does the filing clock start?
For initial claims, the clock starts on the date of service. For appeals and reconsideration requests, it starts on the date of the initial EOB. For Medicare Advantage appeals, it starts on the date of the remittance advice.
What happens if providers miss the Oscar Health claim filing deadline?
A missed deadline results in an automatic denial. The denial code applied is typically CO-29 (timely filing limit exceeded). Under the Contractual Obligation group code, the provider absorbs the unpaid amount and generally cannot bill the patient. Recovery is only possible with documented proof of timely filing or a valid filing exception.
Does a corrected claim get a new filing window?
No. A corrected claim must be submitted within the original 90-day window. Filing a correction does not restart or extend the filing clock.
How can I prove a claim was filed on time?
Retain your clearinghouse acceptance reports, 277CA electronic acknowledgment files, and Availity portal submission confirmations. These records document the date Oscar Health received the claim, which is the date that controls the timely filing determination.
