The CO-282 denial code means a procedure code or revenue code on the claim does not belong on that type of bill. It is a facility claim edit, so you see it on UB-04 and 837I claims. The fix is to compare the type of bill in FL 4 with each line, then send a replacement claim. (Primary source: X12 Claim Adjustment Reason Codes)
In brief: CARC 282 pairs the type of bill with the lines under it. An inpatient room code on an outpatient bill, or an outpatient-only code on an inpatient bill, will trigger it. With CO, the facility cannot bill the patient for the line.
Part of our denial codes library. Written by Manikandan J, CPC, CRCR, who has corrected type of bill and revenue code edits for community hospitals and observation units. Published 11 November 2026. Last updated: 11 November 2026. Code wording quoted word for word from X12. Read about the author and our editorial policy, or contact us to report an error.
What does denial code CO-282 mean?
Denial code CO-282 means the payer checked each line against the type of bill and found a mismatch. The type of bill tells the payer the facility type, the care setting and the claim frequency. A line that does not fit that setting is denied.
| Field | Value |
|---|---|
| Code | 282 |
| Description | “The procedure/revenue code is inconsistent with the type of bill.” |
| Usage | Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present. |
| Start | 07/01/2017 |
Source: X12 Claim Adjustment Reason Codes, checked 11 November 2026.
Key terms: The type of bill is the four-digit code in UB-04 FL 4, such as 0131 for a hospital outpatient claim. Billers often shorten it to TOB. A revenue code is the four-digit department code in FL 42, such as 0300 for laboratory charges. CO means contractual obligation, so the facility owns the denied amount.
Methodology: the code wording is copied from the X12 list, and the observation billing rule comes from the CMS manual cited below.
CO-282 vs OA-282: what is the difference?
CO-282 means a contracted payer applied its bill type edit, and the facility absorbs the line until it fixes the claim. OA-282 flags the same mismatch without a contract basis, which is common on a secondary or crossover claim. In both cases the fix is a replacement claim, not a patient bill.
| Version | What it tells you | First check |
|---|---|---|
| CO-282 | Contracted payer edit; the line is the facility’s loss for now | Your FL 4 and the denied revenue code |
| OA-282 | Same edit from a payer with no contract claim | Whether the primary paid the line on the same TOB |
If the policy REF segment is on the 835, read it first. It often names the exact payer rule.
Why does a code not fit the type of bill?
A code does not fit the type of bill when the claim setting and the line setting disagree. For example, room and board codes in the 011x to 016x range belong on inpatient bills. On an outpatient 013x bill they make no sense, so the payer denies them.
The reverse also happens. An outpatient-only service, such as hourly observation, can be denied on an inpatient 011x bill. Status changes cause most cases, such as an inpatient order that became observation after review. Medicare bills observation with revenue code 0762 and G0378 on a 013x bill (CMS Claims Processing Manual, chapter 4).
Example scenario (fictional names), part 1
CO-282 Denial Example: What Happened
Dana Whitfield bills for Pinecrest Community Hospital. A patient came in with chest pain, R07.89, entered as R0789. The physician kept the patient overnight in observation and never wrote an inpatient order.
Registration was updated to outpatient, so the claim went out on TOB 0131. But the bed charge still dropped from the inpatient charge code as revenue code 0120, semi-private room.
The fictional commercial plan sent CAS*CO*282 on the 0120 line, with M50, “Missing/incomplete/invalid revenue code(s).”
Was the stay itself denied, or just one line? Keep reading, or jump to how it was resolved. Keep reading, or jump to how the CO-282 denial was resolved.
How do I fix a CO-282 denial?
To fix a CO-282 denial, start with FL 4. Confirm the type of bill matches the patient status in the order and the record. Then check each revenue code and HCPCS code against that setting. Replace the wrong lines, or the wrong bill type, and send a replacement claim with the original claim number.
- Confirm patient status. Read the physician order: inpatient or outpatient observation.
- Check FL 4. The second and third digits must match that status.
- Scan every line. Find revenue codes that belong to the other setting.
- Fix the charge source. Correct the chargemaster or bed charge mapping.
- Send a replacement claim. Use frequency 7 in FL 4 and the original number in FL 64.
Example scenario (fictional names), part 2
How the CO-282 Denial Was Resolved
Dana read the order and the case management note. The patient was outpatient observation from start to finish. So TOB 0131 was right, and the 0120 room line was wrong.
Fix: she replaced the 0120 line with revenue code 0762 and G0378 for the observation hours. She sent a replacement claim on TOB 0137 with the original claim number in FL 64.
Outcome: the plan paid the observation line under its outpatient terms. Dana asked the chargemaster team to stop room charges once the status flag changes to observation.
Names and details are illustrative; no real patient data.
Names and details are illustrative; no real patient data.
- FL 42 / FL 44 / FL 46: the inpatient room line (0120) was replaced with revenue code 0762, HCPCS G0378 and 22 hourly units.
- FL 4 + FL 64: replacement bill type 0137 with the original claim number; the outpatient classification (013x) stays because the order was observation.
- FL 67: R07.89 (entered as R0789) and the lab line are unchanged.
- CMS-1500: not shown; it has no type of bill or revenue code field.
Should I change the bill type or the line?
Change whichever one is wrong in the record. If the order says outpatient, keep the 013x bill type and fix the lines. If the order says inpatient and the stay qualified, keep the inpatient lines and move them to an 011x bill. Never change the status just to fit a line.
A true status change usually needs a void and a new claim, not a replacement. Many payers will not let frequency 7 change the bill classification. Check your payer manual before you resubmit.
Can I bill the patient for CO-282?
No, you cannot bill the patient for a CO-282 amount. CO means the payer contract puts the line on the facility. The denial is about how the claim was built, not about the service. Fix the claim and resubmit within the timely filing limit.
Related codes
| Code | Meaning |
|---|---|
| CO-16 | Claim lacks information needed for adjudication |
| CO-5 | Procedure code or bill type inconsistent with the place of service |
| CO-4 | Procedure code inconsistent with the modifier |
| CO-185 | Rendering provider not eligible for this service |
FAQ
What does CO-282 mean?
A procedure or revenue code on the claim does not fit the type of bill in FL 4.
Does CO-282 happen on CMS-1500 claims?
Rarely. The CMS-1500 has no type of bill or revenue code field. Professional setting errors usually come back as CARC 5 instead.
What is the most common CO-282 cause?
Inpatient room codes left on an outpatient observation bill after a status change.
Should I send a corrected claim for CO-282?
Yes. Send a replacement claim with frequency 7 and the original claim number, unless the bill type itself must change.
Does the patient owe a CO-282 amount?
No. CO puts the amount on the facility under the contract.
Sources
How we checked: the CARC 282 quote and usage note were matched word for word with the X12 CARC list on 11 November 2026, and M50 with the X12 RARC list.
- X12, Claim Adjustment Reason Codes (CARC 282, 5). Accessed 11 Nov 2026.
- X12, Remittance Advice Remark Codes (M50). Accessed 11 Nov 2026.
- CMS, Medicare Claims Processing Manual, chapter 4 (observation, section 290). Accessed 11 Nov 2026.
- NUBC, UB-04 data specifications. Accessed 11 Nov 2026.
- CMS, Medicare Claims Processing Manual, chapter 25 (UB-04 form locators). Accessed 11 Nov 2026.
Last updated: 11 November 2026 · Educational content; not legal advice.
Related denial codes
- CO-5: Procedure Code or Type of Bill Inconsistent With Place of Service
- CO-6: Procedure or Revenue Code Inconsistent With the Patient’s Age
- CO-7: Procedure or Revenue Code Inconsistent With the Patient’s Gender
- CO-4: Modifier Inconsistent or Missing – Fix
- CO-16: Claim Lacks Information or Has a Billing Error
- CO-249: Claim Identified as a Readmission
- CO-267: Claim Spans Multiple Months
- CO-283: Attending Provider Not Eligible to Direct Care