835 Denial Combination
CO-16+N20
Contractual Obligation · Claim-Level Adjustment
What This Combination Means
Missing or incomplete — additional information is required regarding the diagnosis for the service to be adjudicated.
82%
Appeal Success
5-10 days
Avg. Resolution
Easy
Difficulty
Yes
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-16+N20 combination — not generic advice.
- 1
Identify the specific diagnosis information the payer needs.
- 2
Pull the clinical documentation supporting the diagnosis.
- 3
Submit the additional diagnosis information with the claim reference.
- 4
Resubmit if necessary with a more specific or additional diagnosis code.
Specialty Context
How CO-16+N20 typically presents across different practice types.
Dental
Verify missing or incomplete — additional information is required regarding the diagnosis for the service to be adjudicated per your dental plan contract and documentation requirements.
Medical
Confirm missing or incomplete — additional information is required regarding the diagnosis for the service to be adjudicated against payer policy and submit corrected claim as needed.
Behavioral Health
Apply behavioral health parity rules and confirm missing or incomplete — additional information is required regarding the diagnosis for the service to be adjudicated per MHPAEA standards.
Individual Code References
View the standalone definition for each code in this combination.
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