Maintenance
X12 code-list changelog
The X12 CARC/RARC lists are revised roughly three times a year (March, July, and November). Each revision can add, retire, or amend codes. This page records when EOBDecode re-verified its corpus against a new X12 publication and what changed.
Cadence: revisions are tracked at each X12 publication. Re-verification updates the last-verified date on every affected code page.
June 16, 2026
Initial corpus
First plain-English corpus published: 41 codes (31 CARC, 10 RARC). All official short descriptions transcribed verbatim from the X12 published code lists and pinned with last-verified dates.