835 Denial Combination
CO-97+N184
Contractual Obligation · Service-Line Level Adjustment
Coding ErrorWhat This Combination Means
The service billed has been bundled into payment for another already-adjudicated procedure, and the payer is instructing the provider to rebill by splitting the technical and professional components. This indicates the claim was submitted with combined billing when the payer requires separate billing for each component. The current submission format prevented proper adjudication and resulted in the service being considered already paid under another line.
Financial Responsibility
provider writeoff
The provider must write off the denied amount under contractual obligation. Once rebilled correctly with separated components, proper payment may be received for each component.
N/A
Appeal Success
1-2 billing cycles (corrected claim)
Avg. Resolution
Medium
Difficulty
No
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-97+N184 combination — not generic advice.
- 1
Identify the original procedure code billed and verify which service has already been paid
Use loop 2110 Service Payment Information REF on the 835 ERA to locate the previously adjudicated service that triggered the bundling
- 2
Separate the service into technical component (modifier TC) and professional component (modifier 26) on two distinct claim lines
The payer's system requires unbundled billing to properly adjudicate each component against its fee schedule
- 3
Submit a corrected claim with claim frequency code 7 including both separated components
This allows the payer to reprocess the service with proper component recognition without duplicate payment risk
Specialty Context
How CO-97+N184 typically presents across different practice types.
Dental
Medical
Common with radiology, pathology, and cardiology services where facilities and physicians bill for the same procedure—facility bills technical component (equipment, staff, supplies) while physician bills professional component (interpretation, reading)
Behavioral Health
May occur with psychological testing where test administration (technical) and interpretation (professional) were billed as a single global code rather than separated components
Individual Code References
View the standalone definition for each code in this combination.
Medicare Contractor Guidance for CARC 97
FCSO + NoridianThere are a few scenarios that exist for denial reason code CO 97. Please review the associated remittance advice remark code (RARC) noted on the remittance advice for your claim and then refer to the specific resources and tips to prevent the denial.
How to Prevent CARC 97 Denials
- ✓
RARC M15 (Bundled services): If the procedure code has a 'b' status on the Medicare Physician Fee Schedule (MPFS) database, the service should not be billed to Medicare. Check your most frequently billed procedure codes on the First Coast fee schedule lookup tool — if status is 'b', do not bill Medicare.
- ✓
RARC M144 (Pre/post-operative care): If billing for split care, coordinate split-care billing activities with other provider(s) involved in the patient's care, and ensure the surgical code is billed before the services for post-operative care are billed.
- ✓
RARC N70 (Consolidated billing): Before providing services to a Medicare beneficiary, determine if a home health episode exists. Ask the beneficiary if they are receiving home health services under a home health plan of care. Always check beneficiary eligibility prior to submitting your claim via SPOT.
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