Health · official-source review · reviewed 2026-10-10
An appeal right is real only while the window is open.
Turn a notice date, a filing date, and an allowed period into a deadline and the days left.
Anyone appealing a denied or underpaid health claim inside a plan's internal process.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Write the date on the denial or explanation-of-benefits letter. Use the printed date, not the day you opened it.
Read the days your plan allows for an internal appeal. The letter or plan document states it.
Write the date you will send the appeal. Include the day you post or upload it.
Add the allowed days to the notice date. That is the deadline to beat.
Subtract the days between the notice and your filing date from the allowed period. Keep proof of the filing date.
Your notice is dated 2026-01-05, you file on 2026-02-04, and 180 days are allowed. The deadline is 2026-07-04, you used 30 days, and 150 days remain.
Use your own source and details. The example is not a record about a real person or organization.
U.S. Centers for Medicare & Medicaid Services · reviewed 2026-10-10
What this source supports: Use the specific notice to identify the process and deadline. Do not apply one deadline to every plan or notice.
Source limit: Plans, programs, and notices can use different steps and deadlines. Follow the notice and contact the plan or a qualified navigator.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This guide counts calendar days from the dates you enter. It does not read your plan documents or file anything.
Plans, programs, and notices can use different steps and deadlines. Follow the notice and contact the plan or a qualified navigator.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Turn a notice date, a filing date, and an allowed period into a deadline and the days left.
This App counts calendar days from the dates you enter. It does not read your plan documents, apply plan rules, or file an appeal.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Turn a notice date, a filing date, and an allowed period into a deadline and the days left.
Free · no account · no upload
Open Claims Appeal Window Days LeftThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Claims Appeal Window Days Left. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.