CO 5: Place of Service Mismatch
The procedure does not match the place of service billed.
Check the place of service code against where the work actually happened, correct it and resubmit. This is a correction, not an appeal.
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What CO 5 means
CO: Contractual obligation. The provider absorbs it and cannot bill the patient.
So the balance cannot move to the patient. Either the appeal recovers it or the practice absorbs it. That makes the appeal decision the whole decision on this line.
Is It Worth Appealing?
Fix and resubmit. This is a correction, not an appeal. Appealing burns the deadline.
Why It Fires
In the order we see it.
An office code billed for work done in an outpatient department, or the reverse.
A telehealth service billed with the in-person place of service.
The place of service defaulted in the practice management system and nobody changed it.
How to Fix CO 5, Step by Step
Check the place of service code against where the work actually happened, correct it and resubmit. This is a correction, not an appeal.
- 1Step 1: Read the remark code. Find the remark code printed next to CO 5 on the 835 or EOB. It says what the payer wants back.
- 2Step 2: Find the cause. Match the denial to one of the 3 causes in Why It Fires above, and fix that one.
- 3Step 3: Do this. Check the place of service code against where the work actually happened, correct it and resubmit. This is a correction, not an appeal.
- 4Step 4: Attach the documentation. The schedule or encounter record showing where the service happened.
The common mistake. Do not appeal this one. The claim is wrong, and an appeal spends the window on a claim that only needed the right two digits.
Free: the Denial Code Appeal Playbook. 53 codes on one sheet: appeal, fix and resubmit, or let it go, and what to attach. Get the playbook
CO 5 description
The procedure does not match the place of service billed.
The procedure does not match the place of service billed. So the balance cannot move to the patient. Either the appeal recovers it or the practice absorbs it. That makes the appeal decision the whole decision on this line.
This is our plain-English wording, not the official X12 text. X12 asserts copyright over the published descriptions, so we write our own and say what it means for the money rather than restating the code.
Where this comes from. This is our own reading of the code, not the payer's and not a copy of the standards text. We classify it from how these denials actually resolve. Where we are unsure, we say so rather than guessing.
Related Codes
CO 4
The procedure code and the modifier do not agree.
Read the CO 4 pageCO 11
The diagnosis does not match the procedure billed.
Read the CO 11 pageCO 59
Reduced under multiple-procedure rules.
Read the CO 59 pageCO 150
The payer says the records do not support the level of service billed.
Read the CO 150 page
Your Questions Answered
What does CO 5 mean?
The procedure does not match the place of service billed. Contractual obligation. The provider absorbs it and cannot bill the patient.
Can you appeal CO 5?
Fix and resubmit. Check the place of service code against where the work actually happened, correct it and resubmit. This is a correction, not an appeal.
Why does CO 5 happen?
An office code billed for work done in an outpatient department, or the reverse. A telehealth service billed with the in-person place of service. The place of service defaulted in the practice management system and nobody changed it.
What documentation wins a CO 5 appeal?
The schedule or encounter record showing where the service happened.
How do I fix a CO 5 denial?
Step 1: Read the remark code. Find the remark code printed next to CO 5 on the 835 or EOB. It says what the payer wants back. Step 2: Find the cause. Match the denial to one cause: An office code billed for work done in an outpatient department, or the reverse. A telehealth service billed with the in-person place of service. The place of service defaulted in the practice management system and nobody changed it. Step 3: Do this. Check the place of service code against where the work actually happened, correct it and resubmit. This is a correction, not an appeal. Step 4: Attach the documentation. The schedule or encounter record showing where the service happened.
Most searched: CO 97 · CO 96 · OA 23 · PR 204 · CO 109 · CO 197 · CO 45 · CO 50
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