What Is Modifier 25? (Quick Answer)
Modifier 25 means “significant, separately identifiable evaluation and management (E/M) service by the same physician or other qualified health care professional on the same day of a procedure or other service.” You add it to the office/outpatient E/M code when the provider did extra, separate work beyond the routine care that comes with the procedure. The note must show that the E/M stands on its own, with its own history, exam, and medical decision making (MDM).
Why Payers Deny Same-Day E/M Claims
Payers are looking harder at claims where an E/M and a procedure are billed on the same day. They often call the E/M “bundled” into the procedure, even when modifier 25 was used correctly.
CPT guidelines and most payer policies allow a separate E/M when the provider does work above and beyond the routine care of the procedure. But each payer has its own rules, and you have to meet them or the E/M gets denied.
Common Reasons for Modifier 25 Denials
Check for these problems before you submit the claim.
- Missing modifier 25. If you bill an office E/M with a procedure and leave off modifier 25, the codes are bundled and only the procedure is paid.
- Bundling edits. Medicare’s National Correct Coding Initiative (NCCI) and many other payers bundle office visits into the global period of a surgical procedure. Routine pre-op and post-op care cannot be billed separately.
- Same diagnosis code. Some insurers assume that using the same ICD-10-CM code on both the E/M and the procedure means the work was related, not separate.
- Payer policy differences. Some commercial plans only pay the E/M if a different provider saw the patient or if the visit was for an unrelated problem. Others pay only one office visit per day, no matter what modifiers you use.
- Weak documentation. This is the most common cause. If the note does not clearly show the separate E/M work, auditors will treat it as part of the procedure.
Medicare and NCCI Rules for Modifier 25
Medicare generally follows CPT® and NCCI rules for bundled services.
When you can use it. Under CPT®, you can add modifier 25 to an E/M code when the visit goes beyond the scope of a minor procedure (global period of 000 or 010 days).
Do you need a different diagnosis? No. Medicare does not require different diagnoses for the two services. For example, a patient with a head laceration may get a neurological exam on top of the laceration repair. Both codes can use the same diagnosis.
When you cannot use it. Medicare’s global surgery rules do not allow a separate E/M for:
- Routine pre-op or post-op care
- The decision to operate. In that case, CPT® tells you to use modifier 57 (decision for surgery) instead.
- Routine work that comes with any minor procedure, such as a basic exam before a skin biopsy
Noridian, a Medicare contractor, explains that an E/M billed on the same day must have its own history, exam, and MDM. It must also be significant enough to justify the extra service.
A simple test: Did the provider document a separate history and exam, and explain why this problem needed extra MDM beyond the procedure? If yes, modifier 25 may be appropriate.
Watch for exceptions. Medicare does not require modifier 25 when an E/M visit goes with the annual flu shot or pneumonia vaccine. It does require the modifier for other preventive visits that include minor services.
Tip: Check CMS.gov often for updates in Medicare transmittals and MLN Matters articles. Also check NCCI edits for bundled services that do not allow a modifier.
Commercial Payer Policies on Modifier 25
Commercial payers vary, and many are stricter than Medicare. Here are three examples from the source article:
| Payer | What the policy says |
|---|---|
| Anthem | Pays the same-day E/M at 100% of the fee schedule if the documentation shows the service was “above and beyond” the usual care for a minor or major procedure. |
| Cigna | Generally pays only one E/M per day. It pays the higher-valued E/M or the procedure’s global code and denies the second. A narrow exception exists, such as a wellness visit combined with a problem visit. |
| UnitedHealthcare (UHC) | Only pays a separate E/M if a different physician in the same group treats an unrelated problem that day. If the same doctor documents both, UHC may treat it as one encounter. |
Commercial payers are also more likely to ask for notes with the claim or on request. The American Medical Association (AMA) says some insurers demand office notes every time modifier 25 is used. Some also downgrade or deny the E/M automatically.
These policies are controversial. The AMA says forcing extra paperwork discourages needed same-day care and can harm patients.
If you get a denial, be ready to appeal. Show how the E/M was separate and cite CPT® guidelines and the payer’s own policy. The AMA offers a sample appeal letter for wrongful bundling denials.
Payer policies change often. Confirm each plan’s current rules before you rely on any of the examples above.
How to Document Modifier 25
Good documentation is your best defense. The goal is simple: write the note so each service stands on its own.
Keep the E/M and the procedure separate
- Start the E/M with its own chief complaint and history of present illness (HPI). For example: “Patient presents today for evaluation of…”
- Follow with an exam and an assessment/plan that clearly relate to that problem.
- Then document the procedure in its own section. For example: “Procedure: lesion removal…”
The American Academy of Family Physicians (AAFP) recommends physically separating the E/M note from the procedure note so each can stand alone. That might mean separate headers or even separate EHR templates.
Add the modifier and pick the right level
- Make sure modifier 25 is attached to the E/M code, not the procedure code.
- Choose the E/M level based on the key components or the time spent, following CPT® guidelines. The note must support it.
Use the AMA’s three-question check
Before you add modifier 25, ask:
- Did the provider record a full, problem-focused history and exam for the complaint?
- Could the visit, as written, stand on its own as a valid E/M?
- Was the work beyond the usual pre-procedure or post-procedure care?
The note should show that extra time was spent or that complex decisions were made beyond what the procedure required.
Example: A patient comes in for trigger-point injections and also has uncontrolled diabetes. The provider adjusts medication and does a separate exam. Document the diabetes work on its own. That time and decision making can support an E/M in addition to the injection code.
Include the details that justify the E/M
- Record every HPI detail and exam finding that led to the E/M. If a patient reports new neurological symptoms, show what the provider did, such as checking reflexes and strength.
- Note any imaging or labs that were reviewed.
- Write the assessment and plan for the problem that drove the E/M, such as medication changes, referrals, and discussions. Do not just describe routine post-op care.
- CMS states that an E/M must have its own history or exam and MDM.
About diagnosis codes
You do not need a separate ICD-10-CM code for each service if the same problem led to both. CPT® 2026 Professional says the E/M may be prompted by the same symptoms or condition as the procedure, and that this can be reported with modifier 25 on the E/M. Different diagnoses are not required.
Documentation mistakes to avoid
- One blended note that mixes the E/M and procedure together
- No separate history or exam for the E/M
- An assessment and plan that only describes routine procedure care
- Leaving off modifier 25
Modifier 25 Example: Skin Mole Removal
Here is the same procedure in two situations.
Scenario A: No separate E/M
The mole looks benign. The provider removes it with local anesthesia. Nothing new comes up.
Result: The visit was only for the procedure. Do not bill an office E/M. The excision code already includes the pre-procedure exam and MDM.
Scenario B: Valid separate E/M with modifier 25
The mole looks suspicious for melanoma. The provider spends extra time discussing cancer risk and biopsy options, orders pathology, does a wider exam to check for other lesions, and builds a treatment plan that goes beyond simple removal.
Result: Modifier 25 on the E/M is supported.
Sample chart for Scenario B:
- History: Patient is concerned about a changing mole on the left arm. It was previously diagnosed as benign.
- Exam (pre-procedure): Full skin exam shows a 6 mm irregular nevus, concerning for malignancy.
- Assessment: Likely dysplastic nevus versus melanoma. Discussed with patient, who consented to excision.
- Plan: Excise the lesion and send for pathology. Discussed sun protection and follow-up.
Modifier 25 Quick Checklist for Coders
- Is the E/M significant and separate from the procedure?
- Is there a distinct history, exam, and assessment/plan for the E/M?
- Is the E/M note separated from the procedure note?
- Is modifier 25 on the E/M code only?
- Did you check NCCI edits?
- Did you check the patient’s insurance policy for modifier 25 rules?
- Does the note support the E/M level billed?
Frequently Asked Questions About Modifier 25
What does modifier 25 mean?
It shows that a significant, separately identifiable E/M service was done by the same provider on the same day as a procedure or other service.
Which code does modifier 25 go on?
The office/outpatient E/M code, not the procedure code.
Can I use modifier 25 if the diagnosis is the same for the E/M and the procedure?
Yes. CPT® does not require different diagnoses. Some payers may question it, so the documentation needs to show the E/M work was separate.
Does Medicare require different diagnoses for modifier 25?
No.
Can I bill an E/M for routine pre-op or post-op care?
No. Routine care is part of the global surgical package. If the visit was to decide on surgery, CPT® says to use modifier 57.
Do I need modifier 25 for a flu shot or pneumonia vaccine visit?
Medicare does not require modifier 25 when an E/M accompanies the annual flu shot or pneumonia vaccine. It does require it for other preventive visits with minor services.
Why do payers deny E/M claims with modifier 25?
Common reasons are a missing modifier, NCCI bundling edits, the same diagnosis on both lines, payer-specific policies, and weak documentation.
Do all payers follow the same modifier 25 rules?
No. Commercial payers such as Anthem, Cigna, and UHC each have their own policies, and many are stricter than Medicare.
What should I do if my modifier 25 claim is denied?
Review the note. If the E/M was truly separate and documented well, appeal. Cite CPT® guidelines and the payer’s own policy, and consider the AMA’s sample appeal letter.
Final Thoughts
Modifier 25 is one of the most checked modifiers in medical billing. To protect your claims, apply it only to the E/M code and only when the E/M was truly separate. Write the history, exam, and assessment/plan apart from the procedure note, and always check NCCI edits and each payer’s policy before you bill. If a good claim is denied, appeal it with the right documentation and references.
