Receiving a denial letter from your insurance company can feel overwhelming — but a denial is not the final word. Most insurance plans are required by law to offer an appeals process, and many denials are overturned when patients push back with the right documentation.

Step 1: Read the denial letter carefully. Your insurer must tell you exactly why the claim was denied. Common reasons include: the service was deemed "not medically necessary," the provider was out-of-network, a prior authorization was missing, or a coding error occurred. Understanding the reason tells you exactly what to address in your appeal.

Step 2: Know your deadline. Most plans give you 30 to 180 days from the denial date to file an internal appeal. Missing this window can forfeit your right to appeal, so act quickly. The deadline will be stated in your denial letter.

Step 3: Gather your documentation. You will need: the denial letter, your Explanation of Benefits (EOB), a letter of medical necessity from your doctor, relevant medical records, and any clinical guidelines that support the treatment. The stronger your documentation, the better your chances.

Step 4: Write your appeal letter. State clearly what you are appealing, why the denial was incorrect, and what outcome you are requesting. Reference your plan's coverage language and attach all supporting documents. Keep the tone professional and factual.

Step 5: Submit and follow up. Send your appeal by certified mail or through the insurer's online portal so you have a record. Follow up within two weeks if you have not received confirmation. Keep copies of everything.

If your internal appeal is denied, you have the right to an external review by an independent organization. This is a powerful option — external reviewers overturn insurer decisions in a significant percentage of cases. A patient advocate can help you navigate every step of this process.