buildmyevidence · guide
How to Appeal a Denied Insurance Claim
The short answer: To appeal a denied insurance claim, keep the denial letter, save every document (your policy, bills, and Explanation of Benefits), log every phone call with the date, time, name of who you spoke to, and what was said, then submit a written appeal before the deadline. A large share of appeals succeed — and the ones that win are backed by an organized, dated paper trail.
A denial isn't the end — it's the start of the appeal. This guide shows you how to document one that works.
Can a denied insurance claim really be overturned?
Often, yes. A significant portion of appeals are decided in the policyholder's favor, especially internal appeals and independent external reviews. Denials happen for many reasons — missing information, coding errors, or questions about coverage — and many are reversed once the issue is addressed. Persistence backed by a clear record is what makes the difference.
What should I document to appeal a denial?
- The denial letter — it states the reason and, crucially, your deadline to appeal.
- Your policy and coverage documents.
- All bills and your Explanation of Benefits (EOB).
- A dated log of every phone call: the date, time, who you spoke to, and what was said.
- Any letters, forms, or supporting evidence (like a doctor's letter of medical necessity).
Why should I log every phone call with my insurer?
Because insurers keep records of your calls, and you should too. Note the date, time, the name of the person you spoke with, and exactly what they told you. If you're given a promise, a reference number, or conflicting information, your dated log is your proof. Calls where "nobody wrote anything down but you" are common — and your notes become the record.
How do I find my deadline to appeal?
Check the denial letter — it should state the deadline and how to appeal. Deadlines are often strict (for many health plans, internal appeals commonly must be filed within 180 days), and missing one can end your appeal regardless of how strong your case is. Note the deadline the moment you get the denial, and give yourself time.
What makes an appeal stronger?
A clear, organized, dated record. When your appeal presents the denial, the relevant policy language, the supporting documents, and a documented history of your contacts — all in order — it's far easier for a reviewer to see the error and reverse it. Disorganized appeals are easy to deny again; well-documented ones are hard to ignore.
When should I start documenting?
The moment you receive the denial — or ideally from when you first filed the claim. Start your dated log with the denial letter, note your deadline, and record every contact from that point on. The sooner you begin, the more complete your paper trail and the stronger your appeal.
Frequently asked questions
How long do I have to appeal a denied insurance claim?
For health plans it's commonly 180 days for an internal appeal, but check your denial letter — deadlines vary and missing one can end your appeal.
What should I keep after a claim is denied?
The denial letter, your Explanation of Benefits, all correspondence, and dated notes from every phone call — name, date, time, and what was said.
Can I get a denial overturned?
Often yes. A large share of appeals succeed, especially internal and independent external reviews. A clear, documented case makes the difference.
What documents do I need for an appeal?
The denial letter, policy documents, medical records or bills, a letter of medical necessity if relevant, and your written appeal — all dated and organized.
General information, not legal advice. Laws vary by location. For your situation, consult a qualified lawyer.