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Free Medical Billing & RCM Tool Suite

Essential tools designed for practice managers, medical billers, and RCM executives to stop claim rejections, audit lost revenue, and benchmark collections performance.

Popular: CO-16 CO-29 CO-50 CO-197 PR-204
15+ Codes

CARC & RARC Denial Code Directory

Searchable intelligence hub for claim denial codes. Includes root causes, step-by-step resolution checklists, and copyable appeal templates.

✓ Root cause breakdowns & RARCs ✓ Pre-written appeal letter templates ✓ Industry overturn recovery benchmarks
Browse Denial Codes →
25+ Payers

Payer Timely Filing Limits Calculator

Interactive submission deadline countdown and appeal window calculator for UHC, Aetna, Cigna, Medicare, BCBS, and military payers.

✓ Exact deadline date & days countdown ✓ Secondary claim & appeal timeframes ✓ Accepted clearinghouse 277CA proof
Calculate Filing Deadline →
Benchmarking

Practice Revenue Leakage & Days in AR Calculator

Calculate the exact financial toll of unrecovered denials, staff rework hours ($25/claim), and capital trapped in accounts receivable past 90 days.

✓ Annual denial loss & rework dollars ✓ MGMA top-performer benchmark gauge ✓ ClaimCure clean claim ROI forecast
Launch AR Calculator →

Top Searched Denial Codes

These 6 codes represent over 60% of all initial claim rejections across US medical practices.

View All 15 Codes →
CO-16 Coding & Modifiers

Missing Information or Billing Error

Claim/service lacks information or has submission/billing error(s)

Recovery: 70% View Guide →
CO-4 Coding & Modifiers

Service Inconsistent with Policy/POS

Service inconsistent with payer policy/procedure and/or not appropriate for place of service

Recovery: 55% View Guide →
CO-29 Timely Filing Deadlines

Timely Filing Limit Expired

Claim submitted past the payer contractual timely filing deadline

Recovery: 30% View Guide →
CO-50 Prior Authorization & Medical Necessity

Not Medically Necessary

Non-covered services — not deemed a medical necessity under payer policy

Recovery: 45% View Guide →
CO-197 Prior Authorization & Medical Necessity

Prior Authorization Absent

Precertification/authorization/notification absent or invalid

Recovery: 55% View Guide →
PR-204 Patient Eligibility & Benefits

Non-Covered Benefit Exclusion

Service/equipment/drug is not covered under patient's current benefit plan

Recovery: 30% View Guide →

Frequently Asked Questions

Everything you need to know about our free tools and claim denial intelligence.

We believe healthcare practices shouldn't have to pay thousands of dollars in consulting fees just to understand why their claims were denied. We offer these free reference tools to empower billing teams and introduce practices to our autonomous medical billing and claim scrubbing software.

CARC (Claim Adjustment Reason Codes) explain why a claim or service line was paid differently than billed (or completely denied). RARC (Remittance Advice Remark Codes) provide additional contextual detail or convey information that cannot be expressed with a CARC alone (e.g., specifying which exact provider field was missing).

ClaimCure's deterministic 4-bucket scrubber validates every claim before electronic EDI 837 transmission against provider registry checks, CPT/ICD-10 NCCI edits, real-time 270/271 insurance eligibility, and payer prior-authorization rules—stopping over 98.6% of rejections before they ever reach the clearinghouse.

Stop chasing denials. Automate your revenue cycle.

Eliminate 85–90% of routine billing tasks and achieve a 98.6% first-pass clean claim rate with ClaimCure's autonomous platform.

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