835 Denial Combination
CO-163+N433
Contractual Obligation · Claim-Level Adjustment
Missing InformationWhat This Combination Means
The claim was denied because referenced attachments or documentation were not received by the payer, and the payer has identified that the claim submission used an incorrect or non-NPI identifier. The RARC indicates the specific corrective action: the claim must be resubmitted using only the National Provider Identifier, which likely resolves the issue that prevented the payer from matching or processing the original documentation.
Financial Responsibility
provider writeoff
The provider must write off the denied amount per contractual terms. If the claim is corrected and resubmitted with proper NPI usage, payment may be recovered on the corrected claim.
N/A
Appeal Success
Corrected claim submission (30-45 days)
Avg. Resolution
Medium
Difficulty
No
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-163+N433 combination — not generic advice.
- 1
Verify the National Provider Identifier used on the original claim submission
Check whether legacy identifiers (UPIN, SSN, or other non-NPI numbers) were used in any provider identifier fields instead of the NPI
- 2
Prepare corrected claim using only NPI in all provider identifier fields
Ensure rendering, billing, referring, and supervising provider fields contain only valid NPI numbers; attach the previously missing documentation
- 3
Submit corrected claim with frequency code 7 and all required attachments
Include all documentation that was referenced on the original claim to address the missing attachment issue alongside the NPI correction
Specialty Context
How CO-163+N433 typically presents across different practice types.
Dental
Dental claims may encounter this when using legacy Dentist License numbers instead of NPI, particularly for referring providers or specialists; ensure all provider fields use Type 1 (individual) or Type 2 (organizational) NPIs as appropriate
Medical
Common when legacy UPIN or state license numbers remain in billing system templates; particularly affects claims with multiple provider types (ordering, referring, supervising) where all must use NPI
Behavioral Health
May occur when behavioral health providers submit claims using state counselor/therapist license numbers instead of NPI, or when group practice NPIs are mixed with individual legacy identifiers for prescribers or supervisors
Individual Code References
View the standalone definition for each code in this combination.
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