RARC · CO group
N290
Missing, invalid, or incomplete rendering provider primary identifier
Contractual obligation; provider write-off unless appealed
- What it means
- The remark that most often explains a CO-16 denial.
- Likely cause
- Rendering provider NPI missing from loop 2310B, common after onboarding a new clinician.
- How to fix it
- Add the rendering provider NPI and taxonomy to the claim template for every clinician before their first session bills.
- Revenue impact
- Fully recoverable; a leading CO-16 root cause in growing practices.
- RARC
- NPI
- CO-16
- onboarding
Related codes
Early access
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