AI-Powered · CMS X12 Database · No Install

The AI Co-Pilot for
Medical Billers and Coders

Diagnose any denial code in 3 seconds. Know exactly what to do next.

Start Free — 10 Lookups on Us Watch 60-Second Demo

ASC X12 + CMS Official Code Sets

139 CARCs

411 RARCs

No PHI Stored

HIPAA-Safe

What it does

Three Tools. One Tab. Zero Wasted Minutes.

Everything you need to decode a denial, understand financial responsibility, and know exactly what to do next.

Text Lookup

Type CO-197. Get the action plan. Meaning, who owes what, your exact next steps, and the appeal deadline — in 3 seconds.

CO-197 · PR-1 · OA-23 N700

Multi-Code Intelligence

Type CO-4 N362, PR-1 MA01, or any combination straight from your ERA. BillerBrain decodes the full cluster — not just one code at a time.

CO-4 N362 · PR-1 MA01 · OA-23 N700

Context Memory

Follow-up questions. It remembers. "What if the RARC was N253 instead?" builds on the prior answer. No starting over.

Follow-up questions work

The reality

The Game Is Rigged. The Numbers Prove It.

15%

Industry denial rate,
rising year over year.
Source: HFMA 2025

$118

Avg. cost to rework
one denied claim.
Source: AMA / Change Healthcare

65%

Of denials that are
never appealed.
Source: MGMA / AHIMA

80%+

Overturned when
actually appealed.
Source: AMA Prior Auth Report 2025

They are not betting your claims are wrong. They are betting you are too busy to prove they are right.

See it work

Type a Code.
Get the Action Plan.

No prompt engineering. No reading four paragraphs of AI hedging. Type the code you need, get a structured answer in 3 seconds: meaning, financial responsibility, action steps, and the exact appeal deadline.

See the full product story →

billerbrain — denial lookup

→ CO-197 M62

⚠ CARC 197 — Prior authorization absent

GROUP CO — Contractual Obligation

→ Provider responsibility. Cannot bill patient.

✓ ACTION — Check Box 23/Loop 2300 REF first

Auth # may be missing, not absent. One fix may resolve entirely.

⏰ DEADLINE — Medicare: 120 days

→ Commercial: 60–180 days (payer-specific)

Response time: 3s

Getting started

Open a Tab. Solve a Denial. Done.

Verify your work email

Enter your email. Receive a 6-digit code. No username, no password to forget.

Type your denial code

Enter any CARC, RARC, Group Code, or combination. Hit enter.

Get the full breakdown

Meaning, responsibility, action steps, appeal deadline. 3 seconds.

Ask follow-up questions

The session remembers context. No starting over, no repeating yourself.

The difference

This Is Not ChatGPT. That Matters.

ChatGPT is asking a stranger for directions. BillerBrain is checking the GPS.

Feature	ChatGPT / Generic AI	BillerBrain
Data source	The entire internet	ASC X12 (139 CARCs) + CMS RARC list (411 codes) — reviewed March 2026
Accuracy	Can hallucinate denial codes	Hardcoded. Deterministic.
Speed	Write a prompt, read 4 paragraphs	Type code. Get action plan. 3 seconds.
Multi-code combos	No structured analysis	Full cluster decode — CARC + RARC + Group together
HIPAA risk	Billers paste PHI unknowingly	No PHI ever enters the system
Output structure	Vague suggestions	Responsibility + action + deadline

ChatGPT is like asking a stranger for directions. They might be right. They might be confidently wrong. You will not know until you are lost.

BillerBrain is like checking the GPS. It pulls from the actual map. Every time. No exceptions.

Read the full comparison →

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The AI Co-Pilot for Medical Billers and Coders