Celtic Insurance Company dba Ambetter Timely Filing Limit

Celtic Insurance Company dba Ambetter's first published filing rule in the reviewed sources is: Illinois review: not established from the sources above for this exact payer state/product; use the applicable provider manual.. Confirm the plan, provider agreement, and event that starts the filing period before submission.

At a glance

• Timely filing is not uniform across all Celtic/Ambetter products. Reviewed official pages show examples of 90 days, 120 days, and 180 days from date of service depending on state/product. For the requested payer family, the safest operational rule is to use the exact plan-specific provider manual or quick reference guide for the applicable line of business rather than a single network-wide filing deadline.

Initial claim filing limits

• Illinois review: not established from the sources above for this exact payer state/product; use the applicable provider manual.
• South Carolina example: 120 days from date of service.
• Georgia example: 180 days from date of service.
• Tennessee example: 90 days from date of service.

Corrected claim filing limits

• Not consistently published in the sources reviewed for this exact payer/state.
• At least one Ambetter state manual/news page indicates corrected claims/reconsideration/dispute deadlines can differ from initial filing and may be tied to EOP/denial dates or state-specific manual instructions.

Appeal and reconsideration deadlines

• A reviewed Ambetter NC grievance/appeals page says a provider has 30 calendar days from Ambetter’s notice of action to file an appeal.
• A reviewed Kansas claim-process page says a Level II claim appeal must be submitted within 180 calendar days from the most recent EOP.

Trigger basis and caveats

• Initial timely filing is typically measured from date of service; for observation/inpatient stays, some Ambetter communications measure receipt from date of discharge.
• Where Ambetter is secondary, some legacy quick-reference materials may measure from primary payment rather than DOS, but that was not verified for the requested payer/state and should not be assumed.
• The requested entity is a Celtic-underwritten Ambetter brand; operational deadlines are state-specific and can change by market and year.
• Use the exact plan/state manual for the member's product; do not apply another state's quick-reference guide unless confirmed identical.
• Appeal/reconsideration rules may be separate from initial claim filing limits.

Provider resources

• Ambetter Health Provider Toolkit (state-specific landing page examples and access to provider manual / pre-auth tools / claims) (official)
• Ambetter of Illinois 2026 Provider and Billing Manual (official)
• Ambetter of Illinois Provider Resources: Manuals and Forms (official)
• Ambetter Health provider news / operational updates (state-specific example) (official)

Sources