835 Denial Combination
CO-58+N198
Contractual Obligation · Service-Line Level Adjustment
What This Combination Means
Place of service is not appropriate for the service — N198 confirms: reimbursement based on the appropriate POS was already included in another payment.
65%
Appeal Success
7-14 days
Avg. Resolution
Medium
Difficulty
Yes
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-58+N198 combination — not generic advice.
- 1
Determine if the service was rendered in a facility where the facility fee includes the professional service.
- 2
For facility-based services, bill the professional component with Modifier 26 only.
- 3
Confirm the POS and facility/non-facility rate distinction for the CPT code.
- 4
Resubmit with the correct modifier if applicable.
Specialty Context
How CO-58+N198 typically presents across different practice types.
Dental
Verify place of service is not appropriate for the service — n198 confirms: reimbursement based on the appropriate pos was already included in another payment per your dental plan contract and documentation requirements.
Medical
Confirm place of service is not appropriate for the service — n198 confirms: reimbursement based on the appropriate pos was already included in another payment against payer policy and submit corrected claim as needed.
Behavioral Health
Apply behavioral health parity rules and confirm place of service is not appropriate for the service — n198 confirms: reimbursement based on the appropriate pos was already included in another payment per MHPAEA standards.
Individual Code References
View the standalone definition for each code in this combination.
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