Medical Billing 101 – Free Denial Code, CPT & RCM Guides

Most Used RCM & Denial Resolution Guides

Free Billing Tools

Quick, free helpers for billers, coders and patients. No sign-up.

Explore All Free Medical Billing & RCM Tools →
  • Appeal Letter Generator

    Pick a denial code and payer, fill in claim details, copy a ready-to-edit appeal letter.

  • Timely Filing Deadline Calculator

    Enter the date of service or EOB date to see claim and appeal deadlines.

  • Denial Code Lookup

    Search any CARC/RARC (e.g. CO-97, CO-16) for its meaning and fix steps.