Modifier 25

What modifier 25 means

Modifier 25 is appended to an evaluation and management (E/M) code to say: on the same day this patient had a procedure, the same clinician also performed a significant, separately identifiable E/M service. Without it, payers bundle the visit into the procedure payment, because every procedure already includes a small amount of assessment work: confirming the plan, checking the site, obtaining consent.

The modifier goes on the E/M line only, and it is only needed when the procedure has a global period of 0 or 10 days (minor procedures). For major procedures with a 90-day global period, the same-day decision-for-surgery situation is handled by modifier 57 instead.

When to use it

The test is whether the visit work went beyond the evaluation inherent in the procedure. Classic supported scenarios:

• A patient comes in for knee pain; the clinician takes a history, examines the knee, orders imaging, and also drains an effusion the same day. The workup is the E/M; the aspiration is the procedure.
• A scheduled skin-lesion removal where the patient also raises a new complaint; the clinician evaluates new-onset chest pain and manages it separately from the excision.
• A well-child visit at which the clinician also evaluates and treats an ear infection (preventive E/M with 25, plus the problem-oriented service, per payer policy).

The diagnosis does not need to differ from the procedure’s diagnosis (CPT says so explicitly), but a different diagnosis makes the separate work easier to see on audit.

When not to use it

• The visit consisted of confirming the patient was ready for a planned minor procedure and performing it. That evaluation is part of the procedure payment.
• The only E/M work was obtaining consent, positioning, or explaining aftercare.
• You are appending it routinely to every same-day E/M by policy. Modifier 25 has been on the OIG work plan repeatedly, and near-100% usage rates are an audit flag payers screen for.

Documentation and denials

The note should let a reviewer separate the two services: the E/M documentation (history, exam, medical decision making) has to stand on its own if the procedure note were deleted. Many practices physically separate the visit note from the procedure note for this reason.

Claims billed without the modifier typically deny the E/M as bundled, on the remit that usually surfaces as CO 97. Adding modifier 25 on a corrected claim works only if the documentation supports it; appending it purely to clear the edit is the pattern payers audit for.

Related modifiers

Modifier 25 is for E/M alongside a procedure. If the question is two procedures billed together, that is modifier 59 territory. If the E/M was the visit at which surgery with a 90-day global period was decided, use modifier 57.