Official X12 description
“Lifetime benefit maximum has been reached for this service/benefit category.”
Source: X12 Claim Adjustment Reason Codes. The X12 External Code Lists are the single authoritative source for every CARC descriptor — always verify against the current release before building a claim-scrub rule.
What CARC 149 actually means
CARC 149 denies because the patient has used the plan's category-specific lifetime benefit maximum (fertility, chiropractic, behavioral health, etc.). Usually non-appealable; shift to patient responsibility.
Common root causes
- Category-specific lifetime max reached (fertility, behavioral, DME, etc.).
Prevention checklist
- Category-benefit tracker in eligibility workflow.
Appeal strategy — step by step
Most CARC 149 denials clear faster with the right remediation than with a formal appeal. Work the steps in order and escalate only when a lower-effort path has been ruled out.
- 1Not typically appealable. For EHB categories, verify ACA applicability.
Sample appeal-letter language for CARC 149
Edit the bracketed fields before sending. This template is a starting point; a payer-specific appeal form may still be required — check the provider portal first.
Payer-specific notes
Payer-specific behavior for CARC 149 publishes here as the QuickIntell anonymized denial ETL ingests sufficient volume. In the meantime, consult the payer directory for the relevant provider manual and appeal form.
How common is CARC 149?
Out of 306 seeded CARCs, ranked by combined US monthly search volume for "CARC 149", "CO-149 denial", and "denial code 149".
Platform frequency ranks publish once the anonymized denial-rate pipeline reaches the publication threshold (strategy §12 Phase 2).
How QuickRCM prevents CARC 149
QuickRCM catches the root causes above before the 837 leaves the clearinghouse:
- Claim-scrub rules fire on every root cause listed above — the scrub references the same X12 CAS segment logic that drives the denial, so what the payer checks, QuickRCM checks first.
- When a denial lands, QuickRCM routes it to the correct worker with the documentation bundle already attached (op note, LCD citation, modifier rationale, EOB, primary 835).
- Appeal templates tuned to each CARC (including this one) pull the supporting facts from the claim and fill the bracketed fields automatically.
CAQH CORE code combinations for CARC 149
Under the CAQH CORE Payment and Remittance Uniform Use rule, health plans may pair CARC 149 only with the remark codes and group codes below for the defined business scenario 3 (Billed service not covered by the health plan). A combination outside this list on an 835 is itself a payer compliance issue worth raising.
| RARC | Remark description | Group code | Scenario |
|---|---|---|---|
| (no RARC) | CARC used without a remark code | CO, PI or PR | 3 |
| N117 | This service is paid only once in a patient’s lifetime. | CO, PI or PR | 3 |
| N362 | The number of Days or Units of Service exceeds our acceptable maximum. | CO, PI or PR | 3 |
| N386 | This decision was based on a National Coverage Determination (NCD). An NCD provides a coverage determination as to whether a particular item or service is covered. A copy of this policy is available at www.cms.gov/mcd/search.asp. If you do not have web access, you may contact the contractor to request a copy of the NCD. | CO, PI or PR | 3 |
| N587 | Policy benefits have been exhausted. | CO, PI or PR | 3 |
| N786 | Benefit limitation for the orthodontic active and/or retention phase of treatment. | CO, PI or PR | 3 |
Frequently asked questions — CARC 149
What does CARC 149 mean?
CARC 149 is an X12 Claim Adjustment Reason Code. The official definition is: "Lifetime benefit maximum has been reached for this service/benefit category." In plain English, the payer is telling you cARC 149 denies because the patient has used the plan's category-specific lifetime benefit maximum (fertility, chiropractic, behavioral health, etc.). Usually non-appealable; shift to patient responsibility.
How do I resolve a CARC 149 (CO-149) denial?
Start with the most common root cause: Category-specific lifetime max reached (fertility, behavioral, DME, etc.). First step: Not typically appealable. For EHB categories, verify ACA applicability. See the full remediation and appeal checklist on this page before filing a formal appeal.
Is CARC 149 patient responsibility?
No — CARC 149 is typically carried under CO (Contractual Obligation) or OA (Other Adjustment), which means it is the provider's responsibility, not the patient's. Do not bill the patient unless the 835 CAS group code is PR.
What does CARC 149 look like on an EOB or 835 remittance?
On the 835 ERA, CARC 149 appears in Loop 2110 CAS segment as "CAS*CO*149*{amount}". On a paper EOB the same code prints in the Adjustment/Denial Reason column with the X12 description: "Lifetime benefit maximum has been reached for this service/benefit category." — usually paired with one or more RARC remark codes in the same remittance line for additional context.
Can CARC 149 be appealed successfully?
Yes — when the root cause does not apply to the specific claim. Overturn rates are strongest when the appeal cites the X12 definition, the payer's own published policy, and documentation that rebuts the payer's rationale. The sample appeal language block above is a starting point; always adapt it to the payer's reconsideration form.
Disclaimer
This page is operational reference for medical-billing professionals. It is not legal, clinical, or contractual advice. X12 code descriptors are maintained by the X12 External Code Lists; always verify against the current X12 release and the payer's own published policy before submitting or appealing a claim.