CO-185 — Rendering provider not eligible to perform
Claim-adjustment reason code 185 · typically reported as CO-185
What it means
The rendering/billing provider isn’t recognized as eligible for this service.
Why DME claims hit it
- Supplier number revoked/deactivated mid-stream
- NPI/PTAN mismatches after reorganizations
How to fix it
- Confirm your enrollment status and identifiers; rebill with the correct active identifiers
Appeal posture
If enrollment was actually active on the DOS, appeal with the enrollment record.
Related denial codes
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