Quick Explanation
A CO 198 denial indicates a conflict in billing involving multiple medical specialties, typically occurring when concurrent care or same-day evaluation and management services are billed by different providers for the same patient. Payers issue this denial when they determine the services are duplicative or lack the necessary specialty-specific documentation and modifiers to justify simultaneous care.
Common Causes for CO 198
Denials with code CO 198 typically happen for the following specific reasons:
- Billing same-day Evaluation and Management (E/M) codes by different specialties without appending distinguishing modifiers or documenting separate diagnoses.
- Incorrect or missing NPI taxonomy codes in the billing system, causing the payer to misidentify distinct specialists as belonging to the same medical specialty.
- Failure to document clear medical necessity demonstrating why concurrent care by multiple specialists was clinically required for the patient's treatment.
- Overlapping global surgery periods where distinct specialists provide post-operative care without formal transfer-of-care documentation or modifiers.
How to Prevent CO 198 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Verify and update all rendering providers' NPI records and billing systems to ensure correct taxonomy codes representing their exact medical specialties are transmitted on claims.
- Append appropriate modifiers, such as Modifier 25, or utilize distinct diagnosis codes to demonstrate separate evaluations performed by different specialists on the same date.
- Implement front-end billing edits to flag concurrent care claims, ensuring they undergo manual review to verify distinct clinical documentation before submission.
- Ensure medical records clearly delineate the unique organ systems, conditions, or treatment plans managed by each individual specialist during concurrent care episodes.
Appeal Letter Template for CO 198
If you believe this claim was denied incorrectly, you can use the following template to submit an appeal.
[Your Practice Header]
[Date]
[Payer Name]
[Appeals Department Address]
RE: Appeal for Claim [Claim Number]
Patient: [Patient Name]
ID: [Patient ID]
Date of Service: [Date]
Denial Code: CO 198 - Multi-specialty denial code
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code CO 198: "Multi-specialty denial code".
We are appealing the denial of this claim under code CO 198. Pursuant to the CMS Claims Processing Manual, Chapter 12, Section 30.6.5, concurrent care is a covered and reimbursable service when provided by physicians of different specialties who are managing distinct, active medical conditions for the same patient on the same day. The enclosed medical records demonstrate that Dr. [Provider A] (Specialty: [Specialty A]) treated the patient for [Condition A], while Dr. [Provider B] (Specialty: [Specialty B]) managed [Condition B]. Because these services were medically necessary, focused on entirely separate clinical issues, and performed by distinct specialties, we respectfully request that the denial be overturned and the claim be processed for full payment.
Attached please find:
1. A copy of the original claim.
2. The relevant medical records supporting the service.
3. [Any other supporting documents].
We respectfully request that you reprocess this claim for payment.
Sincerely,
[Your Name]
[Title]
[Practice Name]
Stop Writing Appeals Manually
Clausea can read your medical records and generate custom, evidence-based appeals for denial code CO 198 in seconds.
Generate Appeal for CO 198 Now