CARC 204: This service/equipment/drug is not covered under the patient's current benefit plan.
The benefit-design exclusion — the carrier's policy explicitly leaves this out. Appealable when the exclusion violates federal law (ACA essential health benefits, MHPAEA, etc.).
CARC 204 is the code your insurance company used to explain why your claim was reduced, denied, or paid less than expected. It appears on your Explanation of Benefits (EOB) — the statement your plan sends after a claim is processed. Here's what it means for you and what you can do about it.
What CARC 204 means
The official X12 description is: “This service/equipment/drug is not covered under the patient's current benefit plan.”
In plain language: The benefit-design exclusion — the carrier's policy explicitly leaves this out. Appealable when the exclusion violates federal law (ACA essential health benefits, MHPAEA, etc.).
Common scenarios
- GLP-1 for weight loss exclusion
- Bariatric surgery exclusion
- Mental health coverage limits
- Out-of-network exclusions
What to do next 204
Check your plan's Summary of Benefits and Coverage. If the excluded service is an essential health benefit, ACA §2707 applies. For mental health, MHPAEA prohibits stricter exclusions than for medical. For preventive, ACA §2713 applies.
DenialHelp helps organize a source-linked draft from the denial notice and confirmed case facts. The patient and treating clinician must verify the governing review rule, current payer policy, clinical sources, attachments, destination, and deadline.
CARC 204 group codes explained
On the 835 ERA, CARC 204 appears alongside a group code that signals who is financially responsible for the adjustment. PR (Patient Responsibility) — Patient owes this amount. Deductibles, coinsurance, copays, and excluded benefits land here.
Frequently asked questions
What does CARC 204 mean?
This service/equipment/drug is not covered under the patient's current benefit plan. In plain language: The benefit-design exclusion — the carrier's policy explicitly leaves this out. Appealable when the exclusion violates federal law (ACA essential health benefits, MHPAEA, etc.).
Is CARC 204 appealable?
Yes — CARC 204 is one of the codes that commonly supports an appeal. Check your plan's Summary of Benefits and Coverage. If the excluded service is an essential health benefit, ACA §2707 applies. For mental health, MHPAEA prohibits stricter exclusions than for medical. For preventive, ACA §2713 applies.
Which group code does CARC 204 appear under?
CARC 204 most often appears under: PR (Patient Responsibility) — Patient owes this amount. Deductibles, coinsurance, copays, and excluded benefits land here.
When does CARC 204 typically appear on a denial?
Common scenarios: GLP-1 for weight loss exclusion; Bariatric surgery exclusion; Mental health coverage limits; Out-of-network exclusions.
How do I appeal a CARC 204 denial?
Check your plan's Summary of Benefits and Coverage. If the excluded service is an essential health benefit, ACA §2707 applies. For mental health, MHPAEA prohibits stricter exclusions than for medical. For preventive, ACA §2713 applies.
Related appeal verticals
- GLP-1 weight-loss drugsWegovy, Zepbound, Mounjaro, Ozempic, Saxenda
- Bariatric surgery — RYGB, sleeve, duodenal switch, SADI-S, revision, ESGRoux-en-Y gastric bypass, sleeve gastrectomy, BPD/DS, SADI-S, revision bariatric surgery, endoscopic sleeve gastroplasty
- Mental health & behavioral healthInpatient psych, residential, PHP/IOP, therapy, TMS, Spravato
- Out-of-network emergencyER, surprise bills, ambulance — No Surprises Act protections
Sources
Appeal a CARC 204 denial
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