CO 234: Procedure Not Paid Separately
This procedure is not paid separately.
Check NCCI edits. If a modifier is supported by the documentation, correct and resubmit.
See a finished review first
- No patient data
- No BAA
- No charge
- No pitch
What CO 234 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?
Usually recoverable. Appeal it. The money is usually there.
Why It Fires
In the order we see it.
The procedure is not separately payable under the payer's policy.
An NCCI edit makes it inclusive to another service on the claim.
How to Appeal CO 234, Step by Step
Check NCCI edits. If a modifier is supported by the documentation, correct and resubmit.
- 1Step 1: Read the remark code. Find the remark code printed next to CO 234 on the 835 or EOB. It says what the payer wants back.
- 2Step 2: Find the cause. Match the denial to one of the 2 causes in Why It Fires above, and fix that one.
- 3Step 3: Take the first action. Check NCCI edits. If a modifier is supported by the documentation, correct and resubmit.
- 4Step 4: Attach the documentation. Documentation supporting a modifier, where the policy allows one.
- 5Step 5: Send the appeal before the deadline. Send it to the payer with the claim, the denial and the documentation, inside the payer's appeal window. See what an appeal letter must contain and the filing limits by payer.
The common mistake. Check the NCCI edit before appealing. If the pair is a hard edit, no modifier will change the outcome.
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 234 description
This procedure is not paid separately.
This procedure is not paid separately. 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 236
This procedure and another one billed the same day cannot be billed together under NCCI.
Read the CO 236 pageCO 97
The payer says this is already paid inside another service.
Read the CO 97 pageCO B15
A required prior service was not billed or not covered.
Read the CO B15 pageCO 107
The related service this one depends on was not on the claim.
Read the CO 107 page
Your Questions Answered
What does CO 234 mean?
This procedure is not paid separately. Contractual obligation. The provider absorbs it and cannot bill the patient.
Can you appeal CO 234?
Usually recoverable. Check NCCI edits. If a modifier is supported by the documentation, correct and resubmit.
Why does CO 234 happen?
The procedure is not separately payable under the payer's policy. An NCCI edit makes it inclusive to another service on the claim.
What documentation wins a CO 234 appeal?
Documentation supporting a modifier, where the policy allows one.
How do I appeal a CO 234 denial?
Step 1: Read the remark code. Find the remark code printed next to CO 234 on the 835 or EOB. It says what the payer wants back. Step 2: Find the cause. Match the denial to one cause: The procedure is not separately payable under the payer's policy. An NCCI edit makes it inclusive to another service on the claim. Step 3: Take the first action. Check NCCI edits. If a modifier is supported by the documentation, correct and resubmit. Step 4: Attach the documentation. Documentation supporting a modifier, where the policy allows one. Step 5: Send the appeal before the deadline. Send it to the payer with the claim, the denial and the documentation, inside the payer's appeal window.
Most searched: CO 97 · CO 96 · OA 23 · PR 204 · CO 109 · CO 197 · CO 45 · CO 50
How Much of This Is Sitting in Your Write-Off Pile?
No patient data. No BAA. No charge.
Upload your denial summary for the last 90 days. 4 columns: payer, CARC code, count, billed amount. You get back which were winnable and what they were worth.