Direct comparison
Modifier 25 vs 57: The Global Period Rule
Modifier 57 works only against a 90-day global; CMS bars it on 0- and 10-day globals. Minor surgery same-day visits are modifier 25 territory.
Ask about Modifier 25 vs 57: The Global Period Rule
Answers are drawn from this comparison and the rest of the CASRAI corpus, with a link to every source.
Answers are AI-generated from CASRAI’s own published pages and can be wrong, so check the linked sources before relying on one; your question is logged without personal data — never sold, never used to train a third-party model — to show us what CASRAI is missing, so please do not type personal or confidential details. How we use this
How do Modifier 25, Modifier 57 compare side by side?
The table below compares Modifier 25, Modifier 57 across 11 procurement-relevant dimensions, from which global periods it works against through what to bill when neither applies.
Side-by-side comparison
| Dimension | Modifier 25 | Modifier 57 |
|---|---|---|
| Which global periods it works against | Minor procedures with 000 or 010 global periods, and XXX-indicator services. Chapter 12 §40.2(A) notes the modifier family applies to 90- and 10-day procedures, and to zero-day procedures in the case of modifiers 22 and 25. | 090 only. Contractors "may not pay" an E/M billed with 57 against a 0- or 10-day global procedure (§30.6.6.C). Noridian: do not append to E/M visits with minor procedures. |
| What it asserts | That a significant, separately identifiable E/M service was furnished, above and beyond the usual pre- and post-operative work of the procedure. | That the E/M service resulted in the initial decision to perform the surgery. |
| Which days it covers | The day of the procedure. | The day of, or the day before, the major surgery — a 90-day global package includes the day before surgery, the day of surgery and the 90 days after. |
| The underlying policy | For minor surgery, CMS says the initial evaluation "is always included in the allowance for a minor surgical procedure" (§40.1.B). Modifier 25 is not paying you for deciding to do the procedure; it is paying you for separate work. | For major surgery, the initial consultation or evaluation to determine the need for surgery is expressly not included in the global package and may be paid separately (§40.1.B, §40.2.A.4). |
| The trap | Billing a visit for work that was really the routine assessment leading to the minor procedure. CMS gives the worked example: a visit is billable alongside suturing a scalp wound if a full neurological examination was done for head trauma, but not if the physician only identified the need for sutures and confirmed allergy and immunisation status. | Using it when the decision was made earlier. Noridian: if the decision for surgery was made a week prior, no modifier should be used and the visit on the day before or the day of surgery is part of the global package with no extra allowance. |
| Does it need a different diagnosis? | No. "Different diagnoses are not required for reporting the E/M service on the same date as the procedure or other service" (§30.6.6.B). Noridian says the same in ICD-10 terms. | No — but it must not be appended to an E/M service unrelated to the diagnosis for which the surgery is performed. Unrelated post-operative visits are modifier 24 territory. |
| Documentation | Both the E/M and the procedure must be appropriately and sufficiently documented in the record, though nothing is submitted with the claim (§30.6.6.B). A separate E/M needs its own history, examination and medical decision making. | A record showing that this visit is where the decision to operate was made. That is a point-in-time fact, and it is either in the note or it is not. |
| Extra documentation triggers | CMS pays without further documentation requirement except in three cases: inpatient dialysis services, pre-operative critical care codes billed on the date of the procedure, and providers a contractor has identified as high users after case-by-case review and education (§30.6.6.B). | Where a contractor finds high modifier 57 usage it must complete a case-by-case review of records, educate the provider, and may then impose prepayment screens or documentation requirements if the rate continues (§30.6.6.B). |
| What it cannot do | It may not be used to generate payment for multiple E/M services on the same day by the same physician, "notwithstanding the CPT definition of the modifier" (§30.6.6.B). | It cannot be appended to services of another physician related to the surgery where the surgeon and that physician have agreed on a transfer of care. |
| NCCI PTP status | PTP-associated, so it can bypass an edit with a correct-coding modifier indicator of 1. | PTP-associated as well — both appear among the global surgery modifiers. |
| What to bill when neither applies | If the visit was the ordinary assessment that led directly to a minor procedure, there is no separately billable visit. The procedure code stands alone. | If the decision was made at an earlier encounter, the day-before or day-of visit is inside the global package and no modifier makes it payable. |
Common questions
Common questions about Modifier 25 vs Modifier 57
What decides whether I use modifier 25 or modifier 57?
+
The global period of the procedure, and nothing else at the first step. Modifier 57 is only available against a procedure with a 90-day global period; Claims Processing Manual Chapter 12, section 30.6.6(C), says contractors may not pay an E/M billed with modifier 57 on the day of or the day before a procedure with a 0- or 10-day global. Same-day visits with minor procedures are modifier 25 territory. Look up the procedure’s global indicator before you look at the note.
Can modifier 57 be used with a minor surgery?
+
No. CMS gives the reason as well as the rule: modifier 57 is not used with minor surgeries because the global period for minor surgeries does not include the day before the surgery, and where the decision to perform a minor procedure is typically made immediately beforehand it is treated as routine preoperative service that is not separately billable (Chapter 12, section 40.2(A)(4)). Noridian states the same as an incorrect use.
Why is the decision to operate paid separately for major surgery but not minor?
+
Because CMS says so in the definition of the global package. The initial consultation or evaluation of the problem by the surgeon to determine the need for surgery is listed among services not included in the global surgical package — with the qualification that this applies only to major surgical procedures, and that for a minor procedure the initial evaluation is always included in the allowance (Chapter 12, section 40.1(B)). For major surgery the decision to operate is precisely what you are paid extra for; for minor surgery it is precisely what you are not.
The decision to operate was made a week before surgery. Do I bill the pre-op visit with 57?
+
No. Noridian addresses this directly: if the decision for surgery was made a week prior, no modifier should be used, and the visit on the day before or the day of surgery falls inside the global surgical package with no extra allowance. Modifier 57 marks the visit at which the decision was made, not any visit that happens to sit near the surgery date.
Do I need a different diagnosis code for modifier 25?
+
No. CMS states that different diagnoses are not required for reporting the E/M service on the same date as the procedure, and Noridian repeats it: a different ICD-10 code from the one submitted with the minor surgery is not required, and the diagnosis for the E/M and the procedure may be the same or different. What has to be present is significant, separately identifiable work with its own history, examination and medical decision making.
Can I bill two E/M services on the same day using modifier 25?
+
No. Chapter 12, section 30.6.6(B), is explicit that contractors may not permit modifier 25 to generate payment for multiple evaluation and management services on the same day by the same physician, notwithstanding the CPT definition of the modifier. This is one of the places where Medicare policy is deliberately narrower than CPT.
What triggers a review of modifier 25 or 57 use?
+
Relative frequency. Where a contractor determines through a specific medical review process that an individual or group has high use of modifier 25 compared with other physicians, conducts a case-by-case review confirming the use was inappropriate, and educates the provider, it may then impose prepayment screens or documentation requirements. The manual sets out the same escalation for high modifier 57 usage. Neither modifier requires documentation with the claim, which is exactly why usage rates are what gets watched.
Going deeper
