If you received a hospital bill showing two charges for the same visit, one for a procedure and one for an office visit, there may be a small two-digit code on that claim that explains why. That code is modifier 25, and it is one of the most commonly used and most frequently misused billing codes in American healthcare.
Quick Answer: Modifier 25 is a billing code appended to an evaluation and management (E&M) service to indicate that the visit was a significant, separately identifiable service provided on the same day as a procedure. When used correctly, it is legitimate. When appended automatically without proper documentation, it is a major source of overbilling, and the Office of Inspector General (OIG) has flagged it as a fraud risk for over two decades.
Understanding modifier 25 as of 2026 can help you spot a double charge on your bill, know your rights to dispute it, and potentially recover hundreds of dollars.
What Modifier 25 Actually Means
Modifier 25 is a CPT (Current Procedural Terminology) modifier managed by the American Medical Association. When a provider appends it to an E&M billing code, it tells the insurance company or Medicare: "This office visit was separate from the procedure we also performed today, please pay us for both."
The official definition from the AMA reads: a "significant, separately identifiable evaluation and management service by the same physician or other qualified health care professional on the same day of the procedure or other service."
In plain English: the patient came in for a problem that was unrelated, or at least significantly distinct, from what the procedure addressed, and the doctor did real diagnostic work on that separate problem. Both services deserve separate payment.
A valid example in 2026: A patient comes in for a scheduled mole removal. During the same visit, the patient mentions they have been having knee pain for two weeks. The doctor examines the knee, reviews symptoms, and orders imaging. The mole removal gets billed under its CPT code. The knee evaluation gets billed as an E&M service with modifier 25 attached. Both charges are legitimate because both services were real and distinct.
An invalid example: A patient comes in for a mole removal. The doctor spends five minutes reviewing the patient's history and examining the mole before removing it. That pre-procedure work is already included in the mole removal's reimbursement rate. Billing a separate E&M visit with modifier 25 for that same routine prep work is inappropriate. The doctor would be charging twice for overlapping services.
When Modifier 25 Is Legitimate
The AMA's guidance lays out three conditions that must all be true for modifier 25 to be used correctly:
- The E&M service must be significant enough to stand alone as a billable visit if the procedure had not occurred.
- The physician must document the medical decision-making or total time spent on the E&M service separately from the procedure.
- The work performed during the E&M service must go beyond the normal pre- and post-procedure evaluation that is already bundled into the procedure code.
When these three conditions are met, modifier 25 is the right code to use. Payers, including Medicare and private insurers, expect to see it in those situations and will reimburse both services.
Common scenarios where modifier 25 is appropriately applied include:
- Managing a chronic condition (like diabetes or hypertension) during a visit that also includes a minor surgical procedure
- Addressing an acute, unrelated complaint that arose during a scheduled follow-up
- Diagnosing a new problem during a visit where a different, previously planned procedure is performed
How Hospitals and Providers Misuse Modifier 25
The problem is that modifier 25 is also easy to abuse, and the financial incentive is clear. Appending the modifier turns one billable service into two. The OIG at the U.S. Department of Health and Human Services has been flagging modifier 25 as a fraud risk since at least 2005.
The most common misuse patterns look like this:
Automatic appending. Some billing departments add modifier 25 to every same-day E&M without reviewing whether the documentation actually supports a separate, distinct service. It becomes a default setting rather than a case-by-case clinical judgment.
Pre-procedure work billed as a separate visit. The history-taking and examination a provider does before any minor procedure (a skin biopsy, an injection, a wound debridement) is already factored into the procedure's reimbursement rate under Medicare's global surgery rules. Billing that pre-procedure work as a separate E&M visit is double-dipping.
Same diagnosis on both codes. If the procedure and the E&M service both list the same diagnosis code, that is a red flag. A truly separate E&M service should address a different medical problem or at least a distinctly different clinical question.
Upcoded E&M level. When modifier 25 is used, some providers inflate the complexity level of the E&M code (billing a level 4 or 5 visit when the documentation only supports a level 2 or 3), compounding the overbilling.
The OIG Numbers Are Striking
In a 2025 audit focused specifically on eye injections, the OIG found that Medicare paid $124 million in E&M services billed with modifier 25 on the same day as intravitreal injections during a single 12-month audit period. About 42 percent of those injection claims had a same-day modifier 25 charge attached. Earlier OIG analysis dating back to 2005 found that 35 percent of Medicare claims using modifier 25 did not meet program requirements.
That is a large share of claims that were never supposed to be paid.
What This Looks Like on Your Bill
When you receive an Explanation of Benefits (EOB) from your insurer or an itemized statement from a hospital, modifier 25 will typically appear as a two-digit add-on next to an office visit or outpatient E&M code (often a 99213, 99214, or 99215). You might see it written as "99214-25" or listed separately in a modifier column.
If you see it, that does not automatically mean you were overbilled. It means you should ask one question: was there a genuinely separate medical issue addressed during that visit that the procedure did not already cover?
If the answer is yes and the documentation in your records reflects that, the charge is likely appropriate. If the answer is no, if you came in for one procedure and there was no distinct, separate clinical evaluation, it is worth investigating further.
How to Dispute a Modifier 25 Charge
You have the right to dispute any medical charge you believe is incorrect. CMS guidelines provide a clear process for challenging bills from hospitals and providers.
Here is how to approach a modifier 25 dispute in 2026:
Step 1: Request an itemized bill. Under federal hospital price transparency rules, every hospital must provide you with a line-by-line itemized bill on request. Ask for this in writing. You are looking for the specific CPT code that has modifier 25 attached.
Step 2: Request your medical records for that date of service. Ask for the clinical documentation from the visit: the physician's note, the chief complaint recorded, the assessment and plan. This is what the insurer or Medicare would look at to verify the modifier.
Step 3: Compare the records to the bill. Does the physician's note document two distinct medical issues? Is there a separate clinical assessment for the E&M service, separate from the procedure? If the note only references the procedure, the modifier 25 charge lacks support.
Step 4: Contact your insurer or Medicare. File a formal billing dispute with your insurance carrier. For Medicare, call 1-800-MEDICARE (1-800-633-4227) or use your Medicare Summary Notice to initiate a redetermination request. For private insurance, use the appeals process described in your plan documents.
Step 5: Contact the provider's billing department directly. Many billing errors are corrected at this step without escalating to a formal appeal. Ask the billing office specifically whether the physician's documentation supports a separately identifiable E&M service on that date.
Step 6: File an OIG complaint if you suspect intentional fraud. The OIG's fraud hotline is 1-800-HHS-TIPS (1-800-447-8477). You can also report potential Medicare fraud at oig.hhs.gov.
Documents to gather before disputing:
- Itemized hospital or provider bill
- Explanation of Benefits from your insurer
- Medical records from the date of service (physician notes, chief complaint, assessment)
- Medicare Summary Notice (if Medicare is your payer)
- Any pre-authorization or referral records for the procedure
Common reasons disputes are denied:
- Documentation does support a separate E&M (the dispute was filed without reviewing records first)
- The E&M service was for a genuinely different diagnosis, properly documented
- The dispute was filed after the insurer's appeal deadline (typically 180 days from the EOB date)
- Missing supporting documentation from the medical record
Check Your Bill With the CoveredUSA Bill Analyzer
Hospital bills routinely contain errors, including improper use of modifier 25. The CoveredUSA Bill Analyzer scans your itemized statement and compares each charge to Medicare's published rates, flags codes that are frequently overbilled (like same-day E&M services), and identifies lines where documentation is typically required but may not have been reviewed.
Upload your bill to the free CoveredUSA Bill Analyzer to find errors, overcharges, and charity care options in 30 seconds. Many patients find hundreds of dollars in questionable charges within minutes.
How Modifier 25 Interacts With Global Surgery Rules
This context matters for understanding why modifier 25 disputes are often valid. Medicare and most insurers operate under what are called "global surgery" payment policies. When a procedure has a global period, typically 0 days, 10 days, or 90 days, the procedure's reimbursement rate already includes a certain amount of evaluation and management work.
For a 0-day global procedure (a minor office procedure like a skin biopsy or injection), the global package includes the immediate pre- and post-procedure evaluation on the same day. That evaluation is already paid through the procedure code. A modifier 25 E&M charge on top of that same-day work is only appropriate if the provider addressed a genuinely separate medical problem, not just the pre-procedure prep.
This is the core of most modifier 25 overbilling: providers billing the pre-procedure evaluation as a separate E&M visit when Medicare's global rules already include it in the procedure payment.
You can review CMS's global surgery rules directly at cms.gov.
Frequently Asked Questions
What does modifier 25 mean on a medical bill?
Modifier 25 on a medical bill means the provider is claiming they performed a significant, separately identifiable evaluation and management service (an office visit or outpatient consultation) on the same day as a procedure. It allows them to bill for both services. Whether that is appropriate depends on whether the documentation actually supports two distinct services.
Is modifier 25 always a sign of fraud?
No. Modifier 25 is a legitimate billing code when used correctly. It becomes a compliance problem, or potential fraud, when it is applied to routine pre-procedure work that is already included in the procedure's payment, or when the documentation does not support a truly separate clinical service. The OIG has found that roughly 35 percent of Medicare modifier 25 claims do not meet program requirements, which means the majority are billed correctly.
Can I get money back if modifier 25 was billed incorrectly?
Yes. If your dispute is upheld, your insurer or Medicare will reprocess the claim without the modifier 25 E&M charge. You would receive a refund or credit for any amount you already paid toward that charge. If you have not yet paid, the corrected bill will reflect the lower amount owed.
How do I know if modifier 25 was appropriate on my bill?
Request your medical records from the date of service. Look at the physician's note for that visit. If the note documents a separate medical problem, different from the procedure's indication, with its own assessment and plan, the modifier 25 charge may be appropriate. If the note only references the procedure, the modifier 25 charge likely lacks clinical support.
Does Medicare cover charges billed with modifier 25?
Medicare will reimburse a same-day E&M service billed with modifier 25 if it is properly documented. However, CMS and the OIG routinely audit these claims because the misuse rate is high. As of 2026, Medicare uses automated edits to flag certain high-risk modifier 25 billing patterns before payment, particularly in specialties like ophthalmology and dermatology where the misuse rate has been documented.
What is the difference between modifier 25 and modifier 59?
Modifier 25 specifically applies to evaluation and management services performed on the same day as a procedure. Modifier 59 is a broader "distinct procedural service" modifier used to unbundle two procedures that would otherwise be combined (bundled) by payer edits. Both are high-audit modifiers and both are subject to OIG scrutiny.
Can a hospital bill a modifier 25 charge for every single visit?
No. The fact that a procedure was performed and an E&M code was billed is not by itself justification for modifier 25. Each claim needs separate clinical documentation demonstrating that the E&M service addressed a distinct medical problem. Blanket application of modifier 25 to all same-day visits is a billing practice that routinely triggers audits and claim denials.
Where can I report suspected modifier 25 fraud?
You can report suspected Medicare billing fraud to the OIG hotline at 1-800-HHS-TIPS (1-800-447-8477) or online at oig.hhs.gov. For Medicaid fraud, contact your state's Medicaid Fraud Control Unit. You can find your state unit through the National Association of Medicaid Fraud Control Units.
