CO-58
Treatment deemed to have been rendered in an inappropriate or invalid place of service
What This Code Means
The payer determined the setting where the service was performed isn’t appropriate for that service.
Common Causes
- Procedure typically performed inpatient billed as outpatient (or vice versa)
- POS code doesn't match payer's coverage rules for that CPT code
How to Resolve or Appeal
- Confirm the payer's place-of-service requirements for the CPT code
- Correct the POS code if it was entered wrong, or appeal with clinical justification
More Denial Codes to Check
Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.