CARC 229: Partial charge amount not considered by Medicare due to the initial claim type of bill being 12X.
Partial charge amount not considered by Medicare due to the initial claim type of bill being 12X.
CARC 229 appears on the 835 ERA (Electronic Remittance Advice) that the payer returns after claim adjudication. It explains a reduction, denial, or payment adjustment to your billing team. For your practice, the question is workflow: identify the pattern, route the denial to the right resolution path (rebill, appeal, write-off), and recover what's recoverable without burning RVU time on dead-end fights.
What CARC 229 means
The official X12 description is: “Partial charge amount not considered by Medicare due to the initial claim type of bill being 12X.”
In plain language: Partial charge amount not considered by Medicare due to the initial claim type of bill being 12X.
Practice workflow for CARC X 229
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
CARC 229 group codes explained
On the 835 ERA, CARC 229 appears alongside a group code that signals who is financially responsible for the adjustment. CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
Frequently asked questions
What does CARC 229 mean?
Partial charge amount not considered by Medicare due to the initial claim type of bill being 12X. In plain language: Partial charge amount not considered by Medicare due to the initial claim type of bill being 12X.
Is CARC 229 appealable?
CARC 229 is usually not appealable on its own — it's typically a contractual, informational, or routine adjustment. Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
Which group code does CARC 229 appear under?
CARC 229 most often appears under: CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
What should I do if I see CARC 229 on the 835?
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
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