835 Denial Combination
CO-45+MA18
Contractual Obligation · Service-Line Level Adjustment
What This Combination Means
Fee schedule maximum exceeded — MA18 indicates the Medicare-specific limiting charge reduction applies.
N/A
Appeal Success
1-2 days
Avg. Resolution
Easy
Difficulty
No
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-45+MA18 combination — not generic advice.
- 1
Review denial details for CO-45-MA18 and identify the specific issue.
- 2
Pull the relevant documentation (records, auth, NPI information) supporting this claim.
- 3
Correct the identified error or gather required documentation.
- 4
Resubmit as a corrected claim or submit an appeal with supporting documentation.
- 5
Follow up with the payer within 10-15 business days to confirm adjudication.
Specialty Context
How CO-45+MA18 typically presents across different practice types.
Dental
Apply dental billing best practices for CO-45-MA18 denial resolution.
Medical
Apply medical billing guidelines for CO-45-MA18 denial — verify payer-specific requirements.
Behavioral Health
Apply behavioral health billing standards for CO-45-MA18 — confirm MHPAEA compliance.
Individual Code References
View the standalone definition for each code in this combination.
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