Modifier 25: Significant, Separately Identifiable E/M Service
Modifier 25 is appended to an E/M code when the E/M is significant and separately identifiable from another procedure or service performed on the same day by the same provider.
Primary source
MLN Matters MM6541 — Modifier 25 →https://www.cms.gov/outreach-and-education/medicare-learning-network-mln/mlnmattersarticles/downloads/mm6541.pdf
Verified May 23, 2026 · This is the authoritative regulator URL. The summary below is a research aid; the linked source controls.
Additional sources
Modifier 25 — "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" — overrides the NCCI bundling that would otherwise prevent reporting an E/M with a same-day minor procedure.
Documentation requirements: the E/M must be above and beyond the usual pre- and post-procedure work for the procedure. The E/M is not for the same problem that prompted the procedure unless it is independently significant. A separate diagnosis is helpful but not required.
MLN MM6541 and the NCCI Policy Manual Chapter 1 set the standard. OIG and DOJ audits frequently target modifier 25 misuse — particularly the pattern of routinely appending modifier 25 to every same-day E/M without documentation distinct from the procedure note.
Several MACs and many commercial payers have implemented modifier 25 prepayment review. Some commercial payers also apply a percentage reduction (typically 50%) to the E/M when billed with modifier 25 — a separate policy from the federal Medicare position.
A modifier 25 supported by a separate note (history of present illness, exam findings, medical decision making related to a distinct issue) is defensible; a bare modifier with no documentation expansion is exposure.
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Related across the archive
- RegulationNCCI Chapter 11: Evaluation and Management ServicesNCCI policy on bundling and separately reporting E/M services with procedures, including modifier 25 use and global surgical package interactions.
- RegulationNCCI Policy Manual OverviewThe National Correct Coding Initiative is the CMS coding edits program that prevents improper Medicare payment due to incorrect code reporting; the Policy Manual is the authoritative coding-policy reference.
- RegulationNCCI Modifier Overrides (Modifier 59 and X{EPSU})Modifier 59 (and its more specific subsets XE, XS, XP, XU) is the principal mechanism for overriding a PTP edit when a procedure is distinct or independent from another performed on the same day.
- RegulationNCCI Global Surgical Package PolicyMedicare's global surgical package bundles preoperative, intraoperative, and routine postoperative care into a single payment for the surgical CPT code, with global periods of 0, 10, or 90 days.
- RegulationNCCI Chapter 10: Pathology and Laboratory PoliciesNCCI policies for clinical laboratory services, including panel-vs-component coding, automated multi-channel chemistry rules, and Date of Service rules for lab tests.
- RegulationNCCI Chapter 9: Radiology PoliciesNCCI policies specific to radiology services, including component coding rules (technical and professional), supervision and interpretation services, and contrast/non-contrast bundling.
- GlossaryModifier 25CPT modifier indicating that a significant, separately identifiable E/M service was performed by the same provider on the same day as another procedure or service.
- RegulationNCCI Bilateral Procedure Reporting RulesMedicare's policy for reporting bilateral procedures uses the MPFS Bilateral Indicator (0, 1, 2, 3, 9) and depends on whether the code descriptor already includes both sides.
Last reviewed May 23, 2026 · Citation verified May 23, 2026
Research aid, not legal advice. This summary is an administrative research aid prepared by D3rx. It does not certify compliance, provide legal advice, replace counsel, or guarantee an audit outcome. For authoritative regulatory text follow the primary source link at the top of this page. The practice remains responsible for reviewing, adopting, and maintaining its compliance program.