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 is what makes the difference.

What documents do I need for an appeal?

The denial letter, policy/coverage documents, medical records or bills, a letter of medical necessity if relevant, and your written appeal — all dated and organized.

buildmyevidence Start your record →

buildmyevidence · insurance

Claim denied? Document everything and build your appeal.

The denial letter, every phone call, the EOB, your records — captured, dated, and kept in one place. Most appeals that win are won by the people who stayed organized.

Start your record See the free demo →

Case TimelineInsurance Appeal16 ENTRIES · TIMESTAMPED

Claim denied — letter receivedMar 3, 2026 · 11:40 AM · the reason didn’t add up

Called insurer — logged the callMar 5, 2026 · 2:15 PM · name & ref noted

Doctor’s letter addedMar 12, 2026 · 9:30 AM · letter of medical necessity

Appeal submittedMar 20, 2026 · 4:05 PM · within the deadline

Export complete case file → PDF

Is this you?

Is this happening to you?

Your claim came back denied — and now you're expected to fight it. If this is where you are:

A denial letter with a reason that doesn’t add up
Phone calls where nobody writes anything down but you
Being told to “just resubmit” with no clear reason why
Records and bills scattered across emails and folders
A deadline ticking on an appeal you haven’t started

Appeals are won on the paper trail — the denial, the dates, the records, in order. Around half of appeals succeed. That's what this app helps you build.

How it works

Three simple steps.

Capture — Add the denial letter, bills, and notes from every call. Timestamped instantly.
Build — Everything lands on one dated timeline, in the order it happened.
Export — One tap turns it into a complete file for your appeal or your lawyer.

The demo

See the whole app for yourself.

No signup. No payment. Just open the free demo and see exactly how it works — about 60 seconds.

Try the free demo →

For patient advocates & insurance lawyers

An appeal is only as strong as the record behind it.

Most people appeal from memory and a pile of letters. The ones who win show up with the denial, every call logged, and the records in order. You can't make those calls for them. But you can point them somewhere that captures it.

What usually walks in

“They denied it, I don’t know why”
Calls nobody logged
Lost the denial letter
Records scattered everywhere

What buildmyevidence brings

The denial letter, dated & filed
Every call logged with names & times
Records and bills in one place
Exported as a clean appeal file

They arrive ready

The full record, not “I think”. A stronger appeal from day one.

Evidence isn’t lost

Recommend it at the first denial and nothing slips.

Costs you nothing

No admin. Just point them to it.

See what your client would bring you →

Opens the free demo · no signup

If it's not documented, it's just your word.

Start building your record today — or see the free demo first.

Start your record See the free demo →

Private to you · export your case file anytime

Questions

Appealing a denied insurance claim

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 is what makes the difference.
What documents do I need for an appeal?: The denial letter, policy/coverage documents, medical records or bills, a letter of medical necessity if relevant, and your written appeal — all dated and organized.

Other situations

Dealing with more than one thing?

buildmyevidence works for any situation you need to prove. A few others:

Medical billing dispute /medical-billing-dispute Car accident /car-accident-documentation Government agency dispute /government-agency-dispute Workplace retaliation /workplace-retaliation

See all situations →