What's New

Changelog

A running log of everything we ship. No fluff — just what changed and when.

2026Public Beta

Arceum public beta launches

  • —395 CARC codes (297 active, 98 deactivated) — official X12 verbatim descriptions
  • —1,178 RARC codes (1,113 active, 65 deactivated) — M/MA/N series, all X12 official
  • —194 common CARC+RARC combination records (CO, PR, OA, PI group codes)
  • —Combo Lookup tool — find pairings by CARC, RARC, or group code
  • —Denial Resolver — triage, action plans, required documents, and payer intelligence
  • —Appeal letter generation with AI (free account, 3/month)
  • —Resolution steps, payer notes, and appeal templates for top CARC codes
  • —Full-text search across all codes with specialty filter
  • —Blog with RCM guides for billing teams
  • —Live at tryarceum.com