835 Denial Combination
CO-45+N607
Contractual Obligation · Service-Line Level Adjustment
Contractual ObligationWhat This Combination Means
The payer has reduced the charge to zero or to a contracted rate because the service was provided for a condition they do not compensate under the plan's terms. This is a contractual adjustment, not a payment denial based on medical necessity, indicating the plan's coverage excludes compensation for this specific condition or diagnosis. The provider's contract with the payer obligates acceptance of this adjustment.
Financial Responsibility
provider writeoff
The provider must write off the adjusted amount per their contractual agreement with the payer. The patient cannot be billed for this contractual adjustment.
N/A
Appeal Success
Immediate (write-off)
Avg. Resolution
Easy
Difficulty
No
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-45+N607 combination — not generic advice.
- 1
Verify the diagnosis code(s) on the claim against the payer's non-compensable condition list
Confirm that the condition treated falls under the payer's contractual exclusions for non-compensable conditions
- 2
Post the contractual adjustment as a write-off in your practice management system
Ensure the adjustment is coded as CO-45 to prevent patient billing and maintain accurate accounts receivable
- 3
Review future service authorization requirements for similar conditions
Determine whether patients with non-compensable conditions should be informed of non-coverage prior to service delivery to arrange alternative payment
Specialty Context
How CO-45+N607 typically presents across different practice types.
Dental
May apply to cosmetic procedures, conditions resulting from excluded activities, or pre-existing conditions not covered under the dental plan's contract terms.
Medical
Common for work-related injuries covered by workers' compensation, conditions explicitly excluded in plan documents, or services related to non-covered diagnoses such as certain cosmetic or experimental conditions.
Behavioral Health
May appear for conditions excluded from mental health parity coverage, court-ordered evaluations, or diagnoses not meeting medical necessity criteria under the behavioral health carve-out contract.
Individual Code References
View the standalone definition for each code in this combination.
Medicare Contractor Guidance for CARC 45
NoridianPayment was made for this claim conditionally because an HHA episode of care has been filed for this patient.
How to Prevent CARC 45 Denials
- ✓
Ensure eligibility is verified in the Noridian Medicare Portal for Home Health Episode History (HHEH)
- ✓
Utilize the Consolidated Billing Tool on the Noridian Medicare website to inquire on items covered in a HHA episode of care, prior to providing
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