How to appeal a denied insurance claim
Denials are appealable through a defined process, a meaningful share are overturned, and the deadlines are strict.
A denial notice has to state the reason and explain how to appeal. Reading that reason carefully is the first step, because a denial for a coding or administrative error is a different and much simpler problem than one on medical necessity.
The first stage is an internal appeal to the insurer, with a deadline on the notice. If that fails, most plans are subject to external review by an independent body whose decision binds the insurer. There is an expedited route where delay would jeopardise health.
What strengthens an appeal is documentation from the treating clinician explaining why the care was necessary, with reference to the plan's own criteria where possible. Many clinicians' offices do this routinely and will help if asked.
Every state has a department of insurance that takes complaints, and many run a consumer assistance programme that will help with an appeal directly. Those services are free.
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Describe what you are trying to work out and a member of the team will answer, or direct you to the office that makes the decision.