835 Denial Combination

CO-16+N57

CO

Contractual Obligation · Claim-Level Adjustment

Missing Information

What This Combination Means

The claim was denied because the prescribing date submitted was either missing, incomplete, or formatted incorrectly. This is a correctable billing error where the provider must write off the current adjustment amount but may resubmit with the valid prescribing date to obtain payment.

Financial Responsibility

provider writeoff

The provider must write off this adjustment amount per contractual obligation. The patient cannot be billed for this amount, though the provider may correct and resubmit the claim.

N/A

Appeal Success

7-14 days (corrected claim)

Avg. Resolution

Medium

Difficulty

No

Appealable

Step-by-Step Resolution

Steps tailored specifically to this CO-16+N57 combination — not generic advice.

Not Appealable:This is a correctable submission error requiring a corrected claim with valid prescribing date information, not an appeal.
  1. 1

    Retrieve the original prescription or prescriber order documentation

    Locate the valid prescribing date from medical records, e-prescribing system, or pharmacy records to verify the actual date the prescription was written

  2. 2

    Validate prescribing date format and completeness

    Ensure the date is complete (MM/DD/YYYY format), falls within clinically appropriate timeframes relative to service date, and matches payer-specific field requirements

  3. 3

    Submit a corrected claim with valid prescribing date

    File using claim frequency code 7 (replacement) with the accurate prescribing date populated in the appropriate field, ensuring all other claim data remains consistent

Specialty Context

How CO-16+N57 typically presents across different practice types.

Dental

Common for claims involving prescriptions written for antibiotics, pain medications, or sedation related to dental procedures where the prescribing date must be documented.

Medical

Frequently occurs on prescription drug claims, DME claims requiring prescriptions, or services tied to medication orders where the prescribing date field was left blank or improperly formatted.

Behavioral Health

Applies to medication management claims or services requiring prescriptions for psychotropic medications where the prescribing date documentation is incomplete or missing from the claim submission.

Individual Code References

View the standalone definition for each code in this combination.

CARC 16RARC N57

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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