Written by NotALawyer Legal AI · Reviewed by External Legal AI · Published April 7, 2026 · Last reviewed June 26, 2026
Insurers deny claims more often than people realize, and many denials are wrong. Health, auto, homeowner's, disability—you have the right to appeal. Knowing the steps can turn a denial into an approval.
Insurers must give a written explanation for every denial. Common reasons: "not medically necessary," "out of network," "pre-existing condition," "policy exclusion," or "insufficient documentation." The exact reason drives your whole appeal—so get it in writing and read it closely.
Pull the full policy language, not the plan summary. Insurers sometimes deny based on their reading of vague wording. If the language could reasonably support coverage, that's grounds to appeal.
Most insurers have an internal appeals process. Submit a written appeal that answers the specific denial reason, backed by evidence: medical records, a doctor's letter on medical necessity, repair estimates, or other documentation.
If your internal appeal is denied, you often have the right to an independent external review by a third party with no ties to the insurer. For health insurance, the ACA guarantees this right.
Every state has an insurance department that regulates insurers. A complaint often triggers a review of your case and can be surprisingly effective—regulators have leverage individual consumers don't.
More on this topic: the Consumer Rights hub
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