What is Kaiser Permanente's timely filing limit for initial claims?

Kaiser Permanente enforces an initial claim timely filing deadline of 180 calendar days from Date of Service.

How many days do you have to appeal a denial with Kaiser Permanente?

Appeals and payment disputes with Kaiser Permanente must be filed within 180 calendar days from denial notification.

What is the secondary claim timely filing limit for Kaiser Permanente?

Secondary claims for Kaiser Permanente must be submitted within 90 days from primary EOB date.

Kaiser Integrated HMO / Commercial 180 Days Limit

Kaiser Permanente Timely Filing Limit & Appeal Deadlines

Official filing rules, submission windows, appeal timeframes, and acceptable electronic clearinghouse proof for billing Kaiser Permanente.

Initial Claim Limit

180 Days from DOS

Secondary Claim Limit

90 Days from EOB

Level 1 Appeal Limit

180 Days

Level 2 Dispute Limit

60 Days

1. Initial Claim Submission Deadline

180 calendar days from Date of Service

Clean electronic 837P or 837I claims must be received and acknowledged by Kaiser Permanente within this window. If a claim is rejected on front-end clearinghouse validation (Level 2), it is not considered received by Kaiser Permanente until corrected and successfully re-transmitted.

2. Specific Filing Rules for Kaiser

Authorized non-plan emergency and referral claims must be submitted within 180 days.

Prior authorization referral number must match claim header to avoid auto-rejection.

3. Accepted Proof of Timely Filing

Official Proof Required by Kaiser

Kaiser electronic claims portal acknowledgment or EDI 277CA confirmation.

Important: Screenshots from your internal billing software or electronic health record (EHR) showing the date a claim was created are not accepted by Kaiser as proof of submission. You must supply clearinghouse 277CA acceptance reports.

4. Appeal Letter Template for Kaiser

Use this standardized appeal letter to overturn a CO-29 timely filing denial when you have verifiable clearinghouse proof:

RE: Timely Filing Denial Appeal (CO-29)
Payer: Kaiser Permanente
Patient Name: [Patient Name] | Member ID: [Member ID]
Date of Service: [Date of Service] | Claim ID: [Claim Number]
Billed Charges: $[Billed Amount]

Dear Appeals Coordinator,

We are submitting this formal appeal in response to the timely filing denial (CO-29) issued on the Explanation of Benefits dated [Remittance Date]. Under our participating agreement with Kaiser Permanente, the timely filing limit is 180 calendar days from the date of service.

The original claim was electronically transmitted and received prior to the timely filing limit expiration. Enclosed please find Exhibit A: The clearinghouse Electronic Data Interchange (EDI) 277CA Claims Acknowledgment Report confirming successful gateway acceptance on [Date of Initial EDI Transmission] with Payer Claim Control Number [ICN / CCN].

Because this documentation constitutes conclusive objective proof of timely electronic submission, we respectfully request that the claim be reprocessed and approved for reimbursement.

Sincerely,
[Billing Manager / Practice Representative]
[Practice Name]
[Phone Number]