835 Denial Combination
CO-16+N23
Contractual Obligation · Claim-Level Adjustment
What This Combination Means
Missing or incomplete patient date of birth — the claim cannot be processed without a valid patient date of birth.
97%
Appeal Success
2-5 days
Avg. Resolution
Easy
Difficulty
Yes
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-16+N23 combination — not generic advice.
- 1
Verify the patient's date of birth in your system against their insurance card or government ID.
- 2
Correct the date of birth if incorrect and resubmit.
Specialty Context
How CO-16+N23 typically presents across different practice types.
Dental
Verify missing or incomplete patient date of birth — the claim cannot be processed without a valid patient date of birth per your dental plan contract and documentation requirements.
Medical
Confirm missing or incomplete patient date of birth — the claim cannot be processed without a valid patient date of birth against payer policy and submit corrected claim as needed.
Behavioral Health
Apply behavioral health parity rules and confirm missing or incomplete patient date of birth — the claim cannot be processed without a valid patient date of birth per MHPAEA standards.
Individual Code References
View the standalone definition for each code in this combination.
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