CO-151 Denial Code: Payment adjusted — information doesn't support this many/frequency of services
A units denial: the payer thinks you billed more units than plausible or allowed (MUE limits), often because units aggregated across dates or a data-entry slip.
Why it happens
- Multiple dates of service submitted in a way the payer read as one date (units aggregated)
- Units field data entry (20 units of a drug instead of 2)
- Medically Unlikely Edit (MUE) threshold exceeded for the code
- Time-based codes exceeding the plausible encounter length
How to fix it, step by step
- Reconcile billed units against documentation for each date of service
- If dates were aggregated: resubmit as separate claims/lines per date of service
- If units genuinely exceed the MUE but are correct: appeal with documentation of necessity for each unit
- Fix recurring unit-entry errors at the charge-entry step
Is it worth working?
High for date-aggregation and entry errors — those are corrections, not arguments.
High for date-aggregation and entry errors — those are corrections, not arguments.
How much is your practice writing off to denials like this?
Send 6 months of remittance files (3 clicks in your billing software) — get a free one-page scorecard of your denied dollars, what's recoverable, and your top payer patterns — within one business day of receiving your files. Recovery is contingency-only: no fee unless money posts.
Get the free denial auditMore codes: the Claimmender denial-code library.