835 Denial Combination

CO-16+N706

CO

Contractual Obligation · Claim-Level Adjustment

Missing Information

What This Combination Means

The payer has denied or adjusted the claim because required documentation was not submitted with the claim. This is a contractual write-off situation where the provider failed to meet documentation submission requirements at the time of initial claim filing. The combination indicates a billing error related to missing paperwork rather than a clinical or authorization issue.

Financial Responsibility

provider writeoff

The provider must absorb this amount as a contractual write-off because documentation was not submitted as required by the payer agreement. The patient cannot be billed for this adjustment.

N/A

Appeal Success

Immediate (write-off with process improvement)

Avg. Resolution

Easy

Difficulty

No

Appealable

Step-by-Step Resolution

Steps tailored specifically to this CO-16+N706 combination — not generic advice.

Not Appealable:CO group code indicates a contractual obligation to write off amounts resulting from submission errors, including failure to submit required documentation initially.
  1. 1

    Apply the adjustment as a contractual write-off in the billing system

    Code as CO-16/N706 to track submission errors related to missing documentation

  2. 2

    Identify which documentation was missing by reviewing payer-specific documentation requirements for the service billed

    Check if medical records, lab results, operative notes, or other supporting materials were required at initial submission

  3. 3

    Implement workflow controls to attach required documentation to future claims for this service type and payer

    Update billing protocols to prevent recurrence of missing documentation errors that result in contractual write-offs

Specialty Context

How CO-16+N706 typically presents across different practice types.

Dental

Common when periodontal charting, pre-operative x-rays, or narrative reports required for surgical or periodontal procedures are not attached at initial claim submission

Medical

Frequently seen when operative reports, chart notes, itemized implant invoices, or prior imaging studies required for surgical or high-cost procedures are omitted from the initial claim

Behavioral Health

May occur when treatment plans, psychological testing reports, or intake assessments required for intensive outpatient or testing services are not submitted with the claim

Individual Code References

View the standalone definition for each code in this combination.

CARC 16RARC N706

Medicare Contractor Guidance for CARC 16

FCSO + Noridian + uhc + aetna + bcbs_az

This RUC is received when a claim is submitted with missing, incorrect, or invalid information. For details pertaining to your claim, please refer to the remittance advice remark codes (RARCs) on the remittance advice (RA).

How to Prevent CARC 16 Denials

  • ✓

    Review the RARC on the remittance advice to identify which specific field has the error.

  • ✓

    Per Medicare guidelines, claims must be filed no later than 12 months after the date of service. RUCs are not considered filed/submitted.

CMS guidelines for completion of form CMS-1500 in the Medicare Claims Processing Manual (100-04), Chapter 26SPOTFee Schedule Lookup ToolCMS laboratory demographics lookupModifier lookup toolNoridian Medicare PortalNMPIVRSame or SimilarPECOSPDAC

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Synthesized from official definitions — not from training data

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