Modifier 25 is one of the most used, and most audited, modifiers in outpatient billing. Used correctly, it gets practices paid for real work. Used by habit, it invites denials and payer reviews.
What does modifier 25 mean?
Modifier 25 tells the payer that an evaluation and management (E/M) service on the same day as a procedure or other service was significant and separately identifiable. It's appended to the E/M code, not to the procedure.
When is modifier 25 appropriate?
Use it when the provider did clearly more than the usual pre-procedure evaluation. Common examples:
- A patient comes in for a scheduled joint injection and also has a new, unrelated problem that is evaluated and treated.
- A wellness visit where the provider also manages a significant problem, such as uncontrolled blood pressure that needs medication changes.
- A patient seen for a new complaint where the provider decides to perform a minor procedure during the same visit.
When is it not appropriate?
Every procedure includes a brief evaluation: confirming the problem, checking the site, getting consent. That work is already paid in the procedure. If the visit was only for the procedure, don't bill an E/M with modifier 25.
What documentation supports modifier 25?
The note should make the separate work obvious to a reviewer:
- A distinct history, exam or medical decision making for the separate problem
- Clear assessment and plan entries for that problem
- Ideally, separate sections of the note for the procedure and the E/M
The diagnosis doesn't have to be different. The same diagnosis can support both services if the E/M work went beyond the normal pre-procedure evaluation. A different diagnosis, though, makes the case much easier to see.
Why do payers deny modifier 25 claims?
Payers deny when the note doesn't show separate work, or when a practice appends modifier 25 to nearly every visit with a procedure. Some payers also reduce payment for the E/M when modifier 25 is used.
Quick checklist
- Was there a separate problem or significant extra work? If not, no E/M.
- Does the note show that work in its own right?
- Is modifier 25 on the E/M code, not the procedure?
Learn E/M level selection and modifiers in depth in our E/M Coding in Practice course.