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Health insurance denial: first steps

A denial is a decision, not always the last word. This checklist covers the first steps for most health plans. It is general information, not advice about your case.

1. Read the notice and find three things

2. Put the deadline on your calendar

Use the deadline estimator to get an estimated date and a calendar reminder, then plan to file about four weeks early, especially if mailing.

3. Call, then ask who is appealing

Call the number on your card, write down the date, name and what you were told, and ask for the exact appeal steps. Ask your doctor's or provider's office whether they have already filed an appeal or can send records. For a denial that depends on medical judgment, the clinician's letter often matters most.

4. Ask for the claim file and criteria

Plans must give you, on request and free of charge, copies of documents and information relevant to your claim. Use the claim file request letter. Sending it does not pause your deadline.

5. Appeal in writing and keep proof

Use the internal appeal letter. Keep copies of everything. Send in a way that gives proof of delivery, such as certified mail with return receipt or a fax confirmation or portal receipt.

6. If it is urgent

If a doctor says waiting could seriously harm your health, ask for an expedited appeal. Urgent appeals must be decided within 72 hours under the federal rules for group health plans, and the HealthCare.gov process also has a fast external review option.

7. Know what comes next

If the plan upholds the denial, ask about independent external review (4 months to request under the federal standard) and about a state insurance department complaint. Free help may be available from your state's Consumer Assistance Program (CAP) or, for Medicare, your State Health Insurance Assistance Program (SHIP).

Why bother? KFF's analysis of 2024 HealthCare.gov Marketplace data found that fewer than 1% of denied in-network claims were appealed, and insurers upheld 66% of the internal appeals that were filed. That is one program's data and does not predict your result.

Sources

Page last reviewed October 17, 2026. Rules change; confirm with your notice, plan documents or the agency pages above.