Reference Library
Insurance Denial & Adjustment Code Library
When your Explanation of Benefits (EOB) shows a denial or adjustment, it lists a code — but not what it means or what to do about it. This library covers 69 CARC and RARC codes with plain-English explanations and specific action steps.
Contractual Obligation
53 codesDeductible Amount
This portion of your bill is being applied to your annual deductible. You owe this amount until your deductible is met for the year.
See action steps →Coinsurance Amount
After your deductible is met, you still owe a percentage of each claim — this is your coinsurance share.
See action steps →Copay Amount
A fixed dollar amount you owe for this visit or service as defined by your plan.
See action steps →The service/equipment is not covered
Your insurance plan does not cover this specific service, item, or procedure at all.
See action steps →The service/treatment is not authorized
Your insurer says no prior authorization was obtained for this service before it was performed.
See action steps →The procedure/revenue code is inconsistent with the modifier
A billing code modifier doesn't match the procedure code, causing the claim to be adjusted or denied.
See action steps →The procedure code is inconsistent with the place of service
The billed procedure doesn't match the type of facility or location where the service was performed.
See action steps →The procedure code is inconsistent with the provider type
The billed service doesn't match the type of provider who performed it according to their license or specialty.
See action steps →The diagnosis is inconsistent with the procedure
The diagnosis code on the claim doesn't medically support the procedure that was billed.
See action steps →The diagnosis is inconsistent with the patient's age
The billed diagnosis doesn't match the patient's age — for example, a pediatric condition billed for an adult.
See action steps →The diagnosis is inconsistent with the patient's gender
The billed diagnosis doesn't match the gender on file for the patient.
See action steps →The diagnosis is inconsistent with the admission type
The diagnosis doesn't match how the admission was categorized (e.g., elective vs. emergency).
See action steps →Payment adjusted because the submitted authorization number is missing, invalid, or does not apply
The prior authorization number on the claim is missing, wrong, or doesn't match what the insurer has on file.
See action steps →Claim/service lacks information or has submission/billing error(s)
The claim is missing required information or contains errors that prevent processing.
See action steps →Duplicate claim/service
Your insurer flagged this claim as a duplicate of one already processed.
See action steps →Claim denied because this is a work-related injury/illness and thus the liability of the Worker's Compensation Carrier
The insurer says this injury or illness should be covered by workers' compensation, not your health plan.
See action steps →This care may be covered by another payer per coordination of benefits
Your insurer thinks another insurance plan — like a spouse's plan — should pay first.
See action steps →The impact of prior payer(s) adjudication including payments and/or adjustments
The payment reflects what's left after another insurer already paid part of this claim.
See action steps →Charges are covered under a capitation agreement/contract
Your provider is paid a fixed monthly rate for your care, so no additional fee-for-service payment is made.
See action steps →Expenses incurred prior to coverage
The service was performed before your insurance coverage was active.
See action steps →Expenses incurred after coverage terminated
Your insurance had already ended when this service was performed.
See action steps →The time limit for filing has expired
The claim was not submitted to the insurer within the required filing deadline.
See action steps →Patient cannot be identified as our insured
The insurer can't match the patient to an active member record.
See action steps →Our records indicate that this dependent is not an eligible dependent as defined
The person receiving care doesn't qualify as a dependent under the plan's rules.
See action steps →Lifetime benefit maximum has been reached
Your plan's lifetime coverage cap for this type of service has been exhausted.
See action steps →Charge exceeds fee schedule/maximum allowable
The provider billed more than the contracted or allowed rate. You're only responsible for your share of the allowed amount — not the billed amount.
See action steps →This (these) diagnosis(es) is (are) not covered, missing, or are invalid
The diagnosis code on the claim is missing, invalid, or not covered by your plan.
See action steps →These are non-covered services because this is a routine exam or screening procedure done in conjunction with a routine exam
Your insurer is treating this service as part of a routine exam rather than a medically necessary visit.
See action steps →These are non-covered services because this is not deemed a 'medical necessity' by the payer
Your insurer decided this service wasn't medically necessary, so they won't pay for it.
See action steps →These are non-covered services because this is a pre-existing condition
The insurer is denying this claim because your condition existed before your coverage started.
See action steps →Procedures or services are not compatible with this type of service
The billed procedure can't be performed or billed alongside another procedure that was already paid.
See action steps →Treatment was deemed by the payer to have been rendered in an inappropriate or invalid place of service
The location where this service was performed isn't appropriate for this type of care per your insurer.
See action steps →Processed based on multiple or concurrent procedure rules
When multiple procedures are performed at the same time, the payment for secondary procedures is reduced.
See action steps →Predetermination: anticipated payment upon completion of services or claim adjudication
This EOB is a pre-determination of what your insurance would pay — not a final claim decision.
See action steps →The related or qualifying claim/service was not identified on this claim
A required reference to a related claim (like a referring provider or parent claim) is missing.
See action steps →Claim/service not covered by this payer/contractor. You must send the claim/service to the correct payer/contractor.
You submitted the claim to the wrong insurance company.
See action steps →Benefit maximum for this time period or occurrence has been reached
You've used all the allowed visits, days, or dollar amount for this type of benefit this year.
See action steps →Submission/billing error(s). At least one Remark Code must accompany this code.
There's a billing or submission error — the remark code on the same line explains the specific issue.
See action steps →The disposition of this claim/service is pending further review
Your insurer hasn't made a final decision yet — the claim is still under review.
See action steps →Patient/insured health identification number and name do not match
The name and insurance ID number on the claim don't match what's in the insurer's system.
See action steps →Payment adjusted because the payer deems the information submitted does not support this many/frequency of services
Your insurer says the number or frequency of services billed doesn't seem clinically reasonable based on the information submitted.
See action steps →Payment is denied when performed/billed by this type of provider
This service isn't covered when performed by the type of provider who billed it.
See action steps →Payment denied for absence of, or exceeded, precertification/authorization
Prior authorization wasn't obtained, or the service went beyond what was authorized.
See action steps →Services not related to the specific accident/illness
The service doesn't appear to be connected to the injury or illness for which you're being treated under a specific claim or benefit.
See action steps →Do not resubmit; we will reprocess this claim after the contract is finalized
Your insurer is asking you to wait — the provider's contract is being resolved and the claim will be reprocessed automatically.
See action steps →Non-standard adjustment code from paper remittance
This adjustment was made based on information from a paper (non-electronic) process and doesn't have a standard code.
See action steps →Precertification/authorization/notification/pre-treatment absent
Required advance approval wasn't obtained before this service was performed.
See action steps →Expenses incurred during lapse in coverage
Coverage had lapsed at the time the service was performed — usually due to a missed premium.
See action steps →Information requested from the Billing/Rendering Provider was not provided or not provided timely or was insufficient/incomplete
The insurer asked the provider for more information but didn't get it in time.
See action steps →An attachment/other documentation is required to adjudicate this claim/service
Your insurer needs additional documents from the provider to process this claim.
See action steps →Sequencing of therapy and/or diagnostic treatment is incorrect
Your insurer says the order in which treatments were tried doesn't follow their required clinical pathway.
See action steps →This provider was not certified/eligible to be paid for this procedure/service on this date of service
The provider who performed this service wasn't credentialed or eligible to bill for it on the date of your visit.
See action steps →Services not covered because the patient is enrolled in a Hospice program
If a patient is in hospice, most curative treatments are no longer covered by Medicare or the plan.
See action steps →Non-Covered
6 codesNon-covered charge(s). At least one Remark Code must accompany this code.
This charge is not covered, and the accompanying remark code explains why.
See action steps →The benefit for this service is included in the payment/allowance for another service/procedure
This charge was bundled into a payment that already covered another related service.
See action steps →Payment made to patient/insured/responsible party
The insurance payment was sent directly to you instead of to the provider.
See action steps →Contracted/negotiated rate expired or not on file
The provider's contract with the insurer is outdated or missing, so the normal in-network rate doesn't apply.
See action steps →This service/equipment/drug is not covered under the patient's current benefit plan
The specific service, device, or drug isn't included in your current plan's covered benefits.
See action steps →This procedure is not paid separately
This procedure's payment is included in a bundled payment for the overall service.
See action steps →Remark
10 codesAlert: You may appeal this decision
You have the right to file a formal appeal of this payment decision.
See action steps →Patient ineligible for this service
The patient doesn't meet the eligibility requirements for this specific service.
See action steps →This decision was based on a Local Coverage Determination (LCD)
A Medicare local policy in your geographic area was used to decide whether to cover this service.
See action steps →Consult plan benefit documents/summary plan description for further information
Check your plan documents for the specific rule that caused this adjustment.
See action steps →Resubmit a separate claim for this service
This service needs to be billed on its own separate claim — it can't be included with the current one.
See action steps →If you do not agree with what we approved for these services, you may appeal our decision
You can formally challenge the payment amount or denial decision.
See action steps →Secondary payment cannot be considered without the identity of or payment information from the primary payer
The secondary insurer can't process this until they get the primary insurer's payment information.
See action steps →Alert: This claim has been forwarded to the patient's additional plan
Your insurer has automatically sent this claim to your secondary insurance for additional processing.
See action steps →Missing/incomplete/invalid social security number or health insurance claim number
The patient's Social Security Number or Medicare claim number on the form is missing or incorrect.
See action steps →Alert: This claim has been split for processing
Your insurer divided this claim into multiple parts for processing.
See action steps →Got a denial code on your EOB?
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