Modifier 25: When and How to Use It Correctly
A practical guide to modifier 25: what it means, when an E/M visit can be billed with a procedure or preventive visit, and the documentation payers expect.
By AccMed RCM Team · Medical Billing Guides
Modifier 25 is one of the most used — and most audited — modifiers in medical billing. Used correctly, it lets a practice be paid for real extra work. Used incorrectly, it causes denials, takebacks and audit risk. Here is what it means, when it applies and how to document it.
What modifier 25 means
Modifier 25 is added to an evaluation and management (E/M) code to show that, on the same day as a procedure or other service, the same provider performed a significant, separately identifiable E/M service. In other words, the visit went beyond the evaluation that is already included in the procedure.
Why it is needed
Minor procedures — those with a 0- or 10-day global period — already include a brief pre-procedure evaluation. Without modifier 25, payers bundle the E/M into the procedure and pay nothing for it. Modifier 25 tells the payer the E/M was extra work that deserves separate payment.
When to use modifier 25
- A patient comes in for a new problem, and you decide to perform a minor procedure during the same visit — for example, evaluating a new skin lesion and then performing a biopsy.
- A preventive visit where a significant problem is also addressed, such as managing worsening blood pressure during an annual physical.
- An established patient with a scheduled procedure who also has a separate problem evaluated and managed that day.
- Same-day E/M with services like injections or vaccines when a separate problem was evaluated.
When not to use it
- When the E/M only covers the decision to perform a minor procedure that was already planned.
- For routine pre- and post-procedure assessment, which is included in the procedure.
- On procedure codes — modifier 25 belongs only on the E/M code.
- For the decision to perform a major surgery (90-day global); that situation calls for modifier 57 instead.
Documentation that supports modifier 25
The best test is simple: if you removed the procedure note, would the E/M documentation still stand on its own and support the level billed? Strong documentation usually includes:
- A separate history, exam and medical decision making for the problem evaluated.
- Clear assessment and plan that goes beyond the procedure.
- A distinct note section, or clearly separated text, for the E/M and the procedure.
- Diagnosis codes linked correctly — a different diagnosis is not required, but the work must be separate.
Common modifier 25 mistakes
| Mistake | Result | Fix |
|---|---|---|
| Appending 25 to every visit with a procedure | Pattern flagged in audits; takebacks | Use only when separate work is documented |
| Putting 25 on the procedure code | Claim denied or processed incorrectly | Attach 25 to the E/M code |
| Thin E/M documentation | E/M denied on review | Document separate history, exam and MDM |
| Using 25 for major-surgery decisions | Incorrect payment | Use modifier 57 for the decision for surgery |
| Ignoring payer-specific rules | Reduced or denied E/M payments | Check each payer’s modifier 25 policy |
Payer policies differ
Medicare and many commercial payers follow the same core definition, but some commercial plans have their own modifier 25 policies, including documentation reviews or payment adjustments. Check each payer’s current policy and watch your remittances for patterns.
Need help reviewing how your practice uses modifier 25? Our medical coding services include modifier review on every claim.