Codes and context only. This never needs a patient name, member ID or date of birth — do not
paste one. Nothing here transmits anything; there is no server. Not coding advice, not legal advice.
Week 16 · The 50-App Year
The code tells you what happened. Not what to do.
Paste a CARC denial code and get the plain-English meaning, the root causes worth
checking first, who owns the fix, whether it is worth appealing at all, and the evidence to attach.
All 24 codes are free. Runs entirely in your browser.
Decode
Search by code or by what you are seeing. The group prefix is the first thing that
matters — it decides who eats the balance before any other question is worth asking.
Four things a denial can be
When the pattern is worth more than the claim
What is free, and what is not
Every code, its meaning and its next action are free. What is paid is what it costs
you when the obvious reading is wrong.
The decoder
Free
All 24 codes with meaning, root causes and owner
Appealable or not, and the action to take
The evidence to attach
Triage into adjust / correct / appeal / route
Trend signals that turn a pile into a process fix
Offline, no account, nothing transmitted
Appeal Craft
$49
24 traps — the expensive misreading for each code, inline where you are working
6 appeal-writing rules — what a reviewer under time pressure actually responds to
5-step escalation ladder, including when to stop
A hostile-review prompt that argues against your appeal before the payer does