How to Write an Appeal Letter That Actually Works
How to Write an Appeal Letter That Actually Works
5 minute read
Most people who receive an insurance denial never appeal. Of those who do, many send a letter that does not match what the reviewer is looking for. And yet when appeals are written well and submitted with the right documentation, they succeed at remarkably high rates.
The appeal process is not designed to be easy to navigate. But it does have a logic to it, and once you understand what an insurer's reviewer is actually looking for, writing a letter that works becomes much less mysterious.
What the Reviewer Is Actually Looking For
When your appeal lands on a reviewer's desk, they are not evaluating whether they feel sympathetic to your situation. They are checking whether the submitted documentation satisfies specific clinical criteria defined in the plan's coverage policy.
This is the single most important thing to understand about the appeal process: the reviewer is working from a checklist. If your letter does not address the items on that checklist, it does not matter how compelling your story is.
The denial letter you received is legally required to state the specific reason for the denial and the specific criteria used to make that decision. That stated reason is your map. Your appeal letter needs to rebut it, point by point, using the insurer's own language.
If your denial said "not medically necessary based on [specific clinical guideline]," your appeal needs to directly address that guideline and explain why your situation meets the criteria. If it said "step therapy requirements not satisfied," your appeal needs to address exactly what steps were tried, when, what the results were, and if applicable, why the remaining steps are not appropriate.
The Three Things Every Winning Appeal Includes
After thousands of successful appeals, the same three elements appear in the ones that work.
1. A physician letter of medical necessity that is specific to your case and responsive to the denial reason.
Generic physician letters that say "I recommend this medication for my patient" almost never succeed. The letter needs to name the specific denial reason, provide clinical context (your diagnosis, your treatment history, your current clinical status), explain why the prescribed medication is appropriate and the denied alternatives are not, and cite relevant clinical guidelines or peer-reviewed evidence.
Your physician may need your help assembling this. Ask for a copy of the denial notice and share the specific denial language with your doctor's office. The letter they write should read as a direct response to that denial, not a general endorsement.
2. Documentation of your treatment history.
If the denial involves step therapy, a claim of experimental status, or questions about medical necessity, documented evidence of your treatment history is essential. This includes prior authorizations that were approved, medications you have taken (with dates, doses, and outcomes), adverse reactions to alternatives, and any relevant lab values or clinical assessments that support your current treatment.
Insurance plans have no visibility into your complete medical history. They see only what has been submitted to them. If you tried and failed a required step drug under a previous insurance plan, that history needs to be documented and submitted because your current plan does not have that record.
3. Relevant clinical guidelines or peer-reviewed evidence.
Reviewers respond to evidence. If a specialty medical society has published guidelines that support the use of your medication for your condition, citing that guideline in your appeal letter adds weight. Commonly cited sources include the American College of Rheumatology, the American Diabetes Association, the Crohn's and Colitis Foundation, and relevant specialty society clinical practice guidelines.
You do not need to conduct a literature review yourself. Your physician should be familiar with the relevant guidelines, and a well-framed request to include a guideline citation in their letter is entirely reasonable.
Common Mistakes That Sink Appeals
A few patterns appear consistently in appeals that fail.
Appealing the wrong thing. If your denial is a categorical coverage exclusion (the plan simply does not cover the drug for your indication), an appeal based on medical necessity will not work. You need to understand whether you are appealing a medical necessity denial, a step therapy denial, an exclusion, or something else. The appeal strategy is different for each.
Sending a generic letter. Letters that do not specifically address the stated denial reason are easy to deny again. Every sentence in your appeal letter should connect back to the criteria that were cited in the denial.
Missing the deadline. Internal appeal deadlines are typically 180 days from the date of denial, but this varies by plan and state. Missing the internal appeal deadline can forfeit your right to external review. Check your denial letter for the specific deadline.
Not requesting all available remedies simultaneously. You can often pursue a peer-to-peer review (your doctor talks directly to the insurer's medical reviewer) while also filing a written appeal. These are not mutually exclusive. The peer-to-peer can sometimes resolve a denial faster than the written appeal process.
How Ellen Helps
Ellen's appeal letter builder walks you through the specific denial reason on your notice and builds a letter structure that responds to it directly. You are not starting from a blank page or hoping a generic letter is good enough. The letter is built around your specific situation, your denial language, and the documentation your insurer needs to see.
Ellen can help you build an appeal letter that speaks the language your reviewer is looking for. Start here →
Frequently Asked Questions
How long do I have to file an insurance appeal?
For most commercial insurance plans, the deadline to file an internal appeal is 180 days from the date of the denial notice. For Medicare Advantage, the deadline is 60 days. For Medicare Part D, it is 60 days from the denial. Check your specific denial notice, as some plans have shorter deadlines.
What happens if my internal appeal is denied?
If your internal appeal is denied, you generally have the right to request an independent external review conducted by an organization that is not affiliated with your insurer. External review decisions are typically binding on the insurer. The deadline to request external review is usually 60 days from the internal appeal denial.
Should I hire someone to write my appeal letter?
A physician-authored letter of medical necessity is the most important document in your appeal. An experienced patient advocate or healthcare attorney can also help structure a complex appeal, particularly for plans governed by ERISA. Ellen is designed to help patients who do not have access to specialized advocates build letters that meet the bar.
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