How to appeal a denial from Ambetter (Centene)

UPDATED JULY 2026 · U.S. PLANS · NOT LEGAL OR MEDICAL ADVICE

Ambetter is Centene's ACA marketplace brand, sold through state-specific companies (Ambetter from …). Appeals follow the standard marketplace rules — internal appeal first, then external review — but always through your state's Ambetter entity, whose name is on your letter.

How appeals work at Ambetter (Centene)

• Your plan is issued by a state-specific Centene subsidiary — appeal to the entity named on the denial letter, using the address or portal it lists.
• Marketplace plans give you at least 180 days to file the internal appeal; the plan decides within 30 days for care you haven't received yet (72 hours if urgent).
• After the final internal denial, you're entitled to external review — your state's program or the federal HHS process, as stated in the letter.
• Centene also runs large Medicaid plans under other brands; if your coverage is actually Medicaid, you additionally have state fair-hearing rights with their own deadlines.

The deadlines that apply to nearly every Ambetter plan

• At least 180 days to file the internal appeal from the date on the denial notice (non-grandfathered plans; the date printed on your letter controls).
• The plan must decide within about 30 days for care you haven't received yet, and about 60 days for care already received.
• Urgent case? Ask for an expedited appeal — a decision in roughly 72 hours when a physician confirms that waiting endangers your health.
• After the final internal denial: you can request independent external review — generally within about 4 months, per your letter.
• Employer self-funded plan? ERISA rules apply: state programs and regulators generally don't, and external review runs through the federal process. Your letter or HR can confirm the funding type.

Federal sources: HealthCare.gov internal appeals and HealthCare.gov external review. Your denial notice and plan documents control when they differ.

Best next reads: How to appeal, step by step and External review, explained — and decode any codes on the letter in the denial-code library.

Common questions

How long do I have to appeal an Ambetter denial?

Marketplace plans must give you at least 180 days from the denial notice to file an internal appeal — but the exact date printed on your letter controls. Urgent denials qualify for expedited handling with a decision in roughly 72 hours.

Who reviews my case if Ambetter denies the appeal?

You can request independent external review after the final internal denial — through your state's external review program or the federal HHS-administered process, whichever your letter names. The reviewer's decision is binding on the plan.