How do I appeal an insurance denial?
Last updated September 3, 2026.
You have a legal right to appeal, in two levels: an internal appeal, where the insurer must conduct a full and fair re-review (sped up for urgent cases), and an external review, where an independent third party decides and the insurer must pay if it loses. HealthCare.gov requires insurers to explain the denial and how to dispute it. The playbook: read the exact reason code (coding errors are common, easy wins); get your doctor's letter of medical necessity - the strongest document there is; file before the letter's deadline (typically 180 days internally); send trackable and copy everything; and get free help from your state insurance department or consumer assistance program. Denials are overturned often enough that the paperwork is always worth it. Pymander is a free AI doctor, 24/7 by text, and can decode the denial letter with you.
What to do
- Read the reason code first: it picks your strategy.
- Get the medical-necessity letter: your doctor's words win appeals.
- Mind the deadline: the letter states it - usually 180 days.
- Call your state insurance department: free backup that insurers answer to.
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