CARC 1
Applied to the deductible
Not a denial. The payer has allowed the charge and applied it to the patient's deductible.
Why you actually get this
- The patient has not yet met their deductible for the plan year.
- A high-deductible plan where most early-year services fall to the patient.
How to check whether it’s correct
- 01Confirm the allowed amount is correct against your contracted rate — the deductible applies to the allowed amount, not the billed charge.
- 02Verify the deductible status matches what eligibility reported.
Rarely worth appealing
Nothing to appeal unless the allowed amount is wrong. The real work is collecting it: rising deductibles have made patient responsibility a materially larger share of practice revenue, and it is frequently the least managed part of the cycle.
Often arrives with
Seeing a lot of these?
A single denial is a claim to work. A pattern of the same denial is a process to fix, and the two need completely different responses. A free panel reads ninety days of your claims data and shows which codes actually recur for you.
Claim Adjustment Reason Codes are maintained by X12 as External Code List 139. The official description of this code is theirs and is not reproduced here. Check the authoritative list for current wording and status.