What To Do If Insurance Denies Your Claim

Start by reading the whole letter, even if the first page already says the claim was denied. Insurance denial letters often include the reason for the decision, the plan rule the insurer relied on, appeal instructions, appeal deadlines, and where to send the appeal. Those details matter because an appeal that responds to the wrong issue can miss the point.

Look for the patient name, member ID, claim number, service date, provider name, requested service, denial code, and any CPT or CDT code shown. Do not guess at codes or medical details if they are not visible. If a detail is unclear, mark it as something to verify before sending the appeal.

Most appeals work best when they answer the reason the insurer actually gave. Common reasons include medical necessity, missing information, benefit limits, out-of-network care, prior authorization issues, coding problems, or services the plan says are not covered. Each reason calls for a slightly different response.

For example, a missing information denial may need records, invoices, or provider notes. A medical necessity denial may need a provider explanation, treatment history, symptoms, diagnosis information, or plan language. A prior authorization denial may need proof that the service was requested and why the provider believed it was needed.

Appeal windows can be short. Some letters mention a number of days from the notice date, while others list a specific deadline. If the letter has both a denial date and an appeal deadline, save both. If you are unsure which deadline applies, contact the insurer or check the plan documents.

Do not wait until every possible document is perfect if the deadline is close. A clear appeal with the denial letter, key claim details, and available records may be better than missing the deadline entirely. You can also ask the insurer what documentation they need for the specific denial reason.

The documents you gather should match the denial. Useful records may include the denial letter, explanation of benefits, provider notes, treatment plan, prescription history, imaging order, surgery recommendation, dental x-rays, hospital records, bills, or plan language. Keep copies of everything you send.

If the denial says information was missing, focus on the missing item. If it says the service was not medically necessary, focus on why the provider recommended the care and how the records support that recommendation. Avoid adding unrelated documents that make the packet harder to review.

A good appeal letter does not need legal language. It should identify the patient, insurer, member ID, claim number, denied service, denial reason, and requested outcome. Then it should explain why the claim should be reviewed again and point to the attached documents.

Keep the tone calm and direct. You can say that you are requesting reconsideration, that the provider recommended the care, and that supporting records are included. ClaimFighter can help turn the denial details into a clear appeal draft, but you should always review the draft before using it.