835 Denial Combination
CO-163+N433
Contractual Obligation · Claim-Level Adjustment
What This Combination Means
Attachment not received — specifically an X-ray or image (N433). The claim requires radiographic evidence to support the billed procedure and no image was received by the payer.
90%
Appeal Success
7-14 days
Avg. Resolution
Easy
Difficulty
Yes
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-163+N433 combination — not generic advice.
- 1
Locate the relevant X-ray or image in your records.
- 2
Confirm the image quality is diagnostic — blurry or incomplete images will be rejected again.
- 3
Submit via the payer's electronic attachment portal or NEA FastAttach for dental X-rays.
- 4
Label each image clearly with patient name, date taken, and claim reference number.
- 5
Follow up after 10 business days to confirm adjudication has resumed.
Specialty Context
How CO-163+N433 typically presents across different practice types.
Dental
Submit periapical and/or bitewing X-rays that show the condition being treated. Images must be diagnostic quality and clearly show the affected area.
Medical
Radiology claims or procedures requiring imaging support (e.g., fracture repairs) need the imaging report or diagnostic images.
Behavioral Health
Very rare. May occur for neuropsychological testing that requires imaging documentation.
Individual Code References
View the standalone definition for each code in this combination.
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