Celtic Insurance Company dba Ambetter Timely Filing Limit

The most important thing to confirm with Celtic Insurance Company dba Ambetter is not just the number of days, but also what event starts the clock. Some payer documents measure from date of service, some from discharge, and some publish different rules for corrected claims or appeals.

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