Major vs. Minor Surgery — Clinical Definitions, Global Periods, and Coding Rules

Major vs. Minor Surgery: Clinical Definitions, Global Periods, and 2026 Regulatory Guidelines

Executive Overview

In medical coding, clinical documentation improvement (CDI), and professional fee (ProFee) reimbursement, the distinction between major surgery and minor surgery is governed simultaneously by clinical invasiveness and formal regulatory global surgical package rules established by the Centers for Medicare & Medicaid Services (CMS) and the American Medical Association (AMA).

While clinical teams classify procedures based on physiological risk, tissue trauma, and anesthesia depth, professional coding and reimbursement rules classify surgical procedures strictly by their assigned Global Days Indicator on the CMS Medicare Physician Fee Schedule (MPFS / PFS):

• Major Surgery: Assigned a 90-day global surgical period (090), which bundles all routine preoperative work 1 day prior to surgery, all intraoperative services on the date of service (DOS), and all related postoperative care for 90 days following surgery into a single comprehensive reimbursement.
• Minor Surgery: Assigned either a 0-day global period (000) or a 10-day global period (010), which bundles preoperative and postoperative care solely on the date of service (000) or the DOS plus 10 postoperative days (010).

Understanding this boundary is vital for inpatient and outpatient coding compliance, proper unbundling of Evaluation and Management (E/M) services using modifiers -25 versus -57, managing postoperative complications using modifiers -78 versus -58, and defending claims against payer audits.

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Master Comparison: Major vs. Minor Surgery

Parameter	Minor Surgery (0-Day Global)	Minor Surgery (10-Day Global)	Major Surgery (90-Day Global)
CMS Global Indicator	000	010	090
Pre-Op Window	Day of procedure only	Day of procedure only	1 calendar day prior + Day of procedure
Post-Op Window	0 days (DOS only)	10 calendar days post-procedure	90 calendar days post-procedure
Inherent Pre-Op Evaluation	Included in procedure wRVU	Included in procedure wRVU	Included in surgical package (unless initial decision)
Unbundle Pre-Op / Same-Day E/M	Modifier -25 (Significant, separately identifiable)	Modifier -25 (Significant, separately identifiable)	Modifier -57 (Decision for major surgery)
Unrelated E/M in Post-Op Window	N/A (No post-op period)	Modifier -24	Modifier -24 / Modifier -FT
Staged / Related Procedure	Modifier -58 (Starts new 000/010)	Modifier -58 (Starts new 010/090)	Modifier -58 (Starts new 090 global)
Unplanned Return to OR	Modifier -78 (No new global)	Modifier -78 (No new global)	Modifier -78 (No new global; intra-op % paid)
Unrelated Procedure in Global	Modifier -79 (Starts new global)	Modifier -79 (Starts new global)	Modifier -79 (Starts new global)
Typical Anesthesia	Local, topical, or digital block; minimal sedation	Local, regional block, or moderate (MAC) sedation	General anesthesia, spinal/epidural, deep sedation
Typical Inpatient Stay	None (Outpatient / Same-day discharge)	Rare (Outpatient or observation; < 24 hrs)	Typical (Inpatient POS 21 or extended Observation)
Surgical Invasiveness	Superficial, endoscopic, needle, non-cavity	Cutaneous, simple excision, minor biopsy	Major body cavity (abdomen, thorax, cranium, joint)

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CMS Global Concept Indicators (MPFS / PFS)

The CMS Relative Value File defines the exact global period category for every CPT and HCPCS Level II code through the GLOB DAYS indicator:

┌────────────────────────────────────────────────────────────────────────┐
│               CMS GLOBAL SURGICAL PERIOD INDICATORS                    │
├────────────┬─────────────────────────────┬─────────────────────────────┤
│ Indicator  │ Classification              │ Policy & Description        │
├────────────┼─────────────────────────────┼─────────────────────────────┤
│ 000        │ Minor Surgery (0-Day)       │ Endoscopic/superficial; DOS │
│ 010        │ Minor Surgery (10-Day)      │ Minor cutaneous/biopsies    │
│ 090        │ Major Surgery (90-Day)      │ 1 day pre-op + DOS + 90 post│
│ XXX        │ Global Concept N/A          │ Diagnostic/imaging/lab/E&M  │
│ YYY        │ Contractor/MAC Priced       │ Unlisted codes; MAC rules   │
│ ZZZ        │ Add-on Surgical Codes       │ Inherits primary code global│
│ MMM        │ Maternity Global Concept    │ Antepartum, delivery, post  │
└────────────┴─────────────────────────────┴─────────────────────────────┘

1. 090 — Major Surgical Procedures

• Preoperative Period: Includes the day before surgery and the day of surgery.
• Postoperative Period: Includes 90 calendar days following the day of surgery (starts day 1 post-op).
• Core Rule: All standard pre-op visits, intraoperative steps, post-op hospital rounding, recovery room time, and outpatient follow-up visits within 90 days are bundled into the global surgical package.

2. 010 — Minor Procedures with Postoperative Period

• Preoperative Period: Day of procedure only.
• Postoperative Period: Includes 10 calendar days following the procedure.
• Core Rule: Common for minor skin excisions, simple wound repairs, biopsies, and soft tissue procedures requiring follow-up (e.g., suture removal, initial wound check).

3. 000 — Minor Procedures without Postoperative Period

• Preoperative & Postoperative Window: Day of procedure only.
• Core Rule: Common for diagnostic endoscopies, minor injections, superficial foreign body removals, and minor laser treatments. Routine follow-up on subsequent days is billable with standard E/M codes if medically indicated.

4. XXX — Global Concept Does Not Apply

• Applies to diagnostic tests (radiology interpretations, laboratory assays, echocardiography, pulmonary function tests) and non-surgical procedures.
• Distinct E/M services provided on the same day do not require global surgical package unbundling modifiers (unless NCCI Column 1/Column 2 edits mandate modifier -59 or -25).

5. ZZZ — Add-On Codes

• Applies to add-on surgical codes (e.g., additional levels in spine surgery, additional lesions in dermatology, complex secondary reconstructions).
• Add-on codes have no standalone global period; they inherit the global period of the primary procedure code billed on the same claim.

6. YYY — Carrier/MAC-Priced Unlisted Codes

• Assigned to unlisted surgical codes (e.g., unlisted surgical procedures). The Medicare Administrative Contractor (MAC) determines the applicable global period upon manual review of the operative report.

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Components of the Global Surgical Package

CMS Internet-Only Manual (IOM) Pub. 100-04, Chapter 12, §40 defines what is bundled versus what is separately reimbursable in a surgical package.

┌──────────────────────────────────────────────────────────────────────────┐
│                   GLOBAL SURGERY BUNDLING TIMELINE                       │
├───────────────────┬───────────────────────────┬──────────────────────────┤
│ Pre-Op (1 Day)    │ Day of Surgery (DOS)      │ Post-Op (10 or 90 Days)  │
├───────────────────┼───────────────────────────┼──────────────────────────┤
│ • Major Surgery   │ • Operative procedure     │ • PACU / Floor rounding │
│   pre-op exams    │ • Local/regional block    │ • Wound & drain care     │
│   (bundled)       │ • Surgical approach       │ • Suture/staple removal  │
│ • Initial Decision│ • Supplies & dressings    │ • Bedside complications  │
│   for Major Surg  │ • Pre-op exam (minor surg)│ • Routine pain mgmt      │
│   → [[-57]] ONLY   │ • Distinct E/M → [[-25]]  │ • Unrelated E/M → [[-24]]│
└───────────────────┴───────────────────────────┴──────────────────────────┘

Services Included in the Global Surgical Package (Non-Billable Separately)

1. Preoperative Care:
   • Pre-op visits occurring the calendar day prior to a 90-day major surgery (once the decision to operate has already been made).
   • Pre-op evaluation and decision to perform a minor procedure (000/010 days) on the date of service.
2. Intraoperative Work:
   • The surgical approach, opening, exploration, and closure.
   • Local infiltration, digital block, or topical anesthesia administered by the operating surgeon.
   • Intraoperative imaging guidance, monitoring, or scoping when designated as inclusive in CPT parenthetical instructions or NCCI PTP edits.
   • Surgical supplies, instruments, standard trays, and routine intraoperative medications.
3. Postoperative Hospital & Bedside Care:
   • Inpatient floor rounding, intensive care unit visits, and recovery room visits related to the surgical recovery.
   • Management of uncomplicated postoperative symptoms (nausea, minor surgical pain, mild fever, urinary retention, ileus).
   • Routine bedside procedures: dressing changes, incision cleansing, suture/staple removal, packing changes, catheter removal, drain removal, NG tube insertion/removal.
4. Postoperative Complications Managed Non-Operatively:
   • All medical care and bedside interventions provided by the surgeon for complications (e.g., superficial wound dehiscence treated at bedside, localized seroma aspiration in clinic) that do not require a return to the operating room.
5. Administrative Work:
   • Operative note drafting, discharge planning, orders, prescription writing, and family discussions directly related to the surgical procedure.

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Services Excluded from the Global Package (Separately Billable with Modifiers)

1. Initial Decision for Major Surgery (Modifier -57):
   • The initial cognitive E/M encounter during which the surgeon evaluates the patient and decides to perform a 90-day major surgery (billed on the day of or the calendar day before surgery).
2. Significant, Separately Identifiable E/M with Minor Surgery (Modifier -25):
   • An E/M encounter on the same day as a 0-day or 10-day minor surgery that addresses a clinical problem above and beyond the standard pre- and post-procedure work.
3. Unrelated E/M During Postoperative Period (Modifier -24):
   • An E/M visit provided by the operating surgeon during the 10-day or 90-day global window for an acute or chronic condition completely unrelated to the original surgery.
4. Critical Care for Post-Op Patients (Modifier -24, -FT, or -25):
   • Critical care services (99291 / 99292) provided to an unstable postoperative patient when organ system failure is unrelated to the surgery or requires extensive, complex critical care beyond typical surgical aftercare.
5. Staged or Related Subsequent Procedures (Modifier -58):
   • A planned, staged, or more extensive surgical procedure performed by the original surgeon during the postoperative period of the initial surgery (starts a new global period).
6. Unplanned Return to the Operating Room for Complications (Modifier -78):
   • An unplanned surgical procedure requiring a return to the operating room (or procedural suite) during the postoperative global period to manage an operative complication (e.g., postoperative hemorrhage control, deep wound debridement). Does not reset the global period.
7. Unrelated Surgical Procedures (Modifier -79):
   • An independent, unrelated surgical procedure performed by the same surgeon during the postoperative period of a previous surgery (starts a new global period).
8. Diagnostic Tests & Separate Biopsies:
   • Distinct diagnostic biopsies, endoscopic diagnostic examinations performed prior to the decision for major open resection, and diagnostic imaging/laboratory tests.
9. Division of Global Care (Split-Care Modifiers):
   • When different physicians handle distinct phases of the surgical package:
     • Modifier -54: Surgical Care Only (Surgeon performs intra-op only).
     • Modifier -55: Postoperative Management Only (Provider assumes post-op care).
     • Modifier -56: Preoperative Management Only (Provider performs pre-op prep).
10. Surgical Team Modifiers:
    • Modifier -62: Two Surgeons (Co-Surgery) — each surgeon handles a distinct portion of the same single procedure (paid at 62.5% each).
    • Modifier -80 / -81 / -82 / -AS: Assistant at surgery.

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E/M Unbundling Rules: Modifier -25 vs. Modifier -57

A frequent cause of payer audits and denials is confusing Modifier -25 with Modifier -57.

                         E/M ENCOUNTER ON OR NEAR DATE OF SURGERY
                                            │
               ───────────────────────────────────────────────────────────
               │                                                         │
       MINOR SURGERY (000 / 010)                                 MAJOR SURGERY (090)
               │                                                         │
   Did the visit involve significant,                       Was this the encounter where the
   separate E/M work beyond the standard                   initial decision for major surgery
   pre/post-op work inherent to procedure?                             was made?
               │                                                         │
        ───────┴───────                                           ───────┴───────
        │             │                                           │             │
       YES           NO                                          YES           NO
        │             │                                           │             │
   Append [[-25]]   BUNDLED                                  Append [[-57]]   BUNDLED
   to E/M code   (Do not bill E/M)                          to E/M code   (Do not bill E/M)

Detailed Modifier Comparison

┌─────────────────────────┬───────────────────────────────┬───────────────────────────────┐
│ Criteria                │ Modifier [[-25]]              │ Modifier [[-57]]              │
├─────────────────────────┼───────────────────────────────┼───────────────────────────────┤
│ Procedure Type          │ Minor Surgery ONLY (000, 010) │ Major Surgery ONLY (090)      │
│ Timeframe               │ Same calendar day as procedure│ Day of or 1 day prior to surg │
│ Clinical Rationale      │ Significant, separate E/M work│ Initial decision for surgery  │
│ Routine Pre-Op Included?│ YES — routine pre-op bundled  │ YES — routine pre-op bundled  │
│ Diagnosis Requirement   │ Same or different ICD-10      │ Same or different ICD-10      │
│ Fatal Coding Error      │ Appending 25 to 090 decision  │ Appending 57 to minor surgery │
└─────────────────────────┴───────────────────────────────┴───────────────────────────────┘

Critical Audit Trigger: Modifier Misuse

• Never append Modifier -57 to a minor procedure (000 or 010 global). Payers will automatically downcode or deny the E/M service.
• Never append Modifier -25 to an E/M service where the sole purpose was evaluating a patient for a scheduled minor procedure (e.g., evaluating a skin lesion on the day of a scheduled biopsy without an independent E/M problem).
• Never append Modifier -57 to a pre-scheduled, staged, or elective major surgery when the decision was documented weeks earlier in an outpatient clinic.

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Postoperative Modifier Decision Matrix (Modifiers -58, -78, -79)

When a patient undergoes a secondary surgical procedure during the postoperative global period of a previous surgery, the following matrix dictates modifier selection:

Modifier	Modifier Name	Related to Primary Surgery?	Planned vs. Unplanned	Location Requirement	Resets Global Period?	Payment Allowance
-58	Staged / Related Procedure	YES	Planned / Staged (or more extensive)	Any setting (OR, bedside, clinic)	YES (Starts full new global period)	100% of MPFS allowable
-78	Unplanned Return to OR	YES (Complication)	Unplanned	Operating / Procedure Room ONLY	NO (Original global clock continues)	Intra-op value only (~70–80% of allowable)
-79	Unrelated Procedure	NO	Either	Any setting	YES (Starts full new global period)	100% of MPFS allowable

Clinical Scenarios for Modifiers -58, -78, and -79

1. Modifier -58 Example (Staged/Related):

   • Scenario: Patient undergoes wide excision of a malignant melanoma (090 global). The surgeon documents that a delayed local advancement flap reconstruction will occur 5 days later once margin clearance is confirmed.
   • Coding: Secondary reconstruction coded with modifier -58. Full fee is paid and a new 90-day global period begins.

2. Modifier -78 Example (Unplanned Return to OR for Complication):

   • Scenario: Patient undergoes total hip arthroplasty (090 global). On postoperative day 2, acute hematoma with active bleeding occurs requiring an urgent return to the operating suite for surgical evacuation and hemostasis.
   • Coding: Evacuation code billed with modifier -78. Payment is reduced to the intraoperative work value; the original 90-day global period continues without resetting.

3. Modifier -79 Example (Unrelated Procedure in Global Period):

   • Scenario: Patient undergoes laparoscopic cholecystectomy (090 global). On postoperative day 20, patient falls and sustains a closed displaced distal radius fracture requiring open reduction internal fixation (ORIF, 090 global) by the same multi-specialty surgical group.
   • Coding: ORIF procedure billed with modifier -79. Full fee is paid and a new independent 90-day global period begins for the wrist.

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Specialty-Specific Clinical Examples

┌────────────────────────────────────────────────────────────────────────────────────────┐
│                        SPECIALTY SURGICAL CODE COMPARISONS                             │
├────────────────────┬─────────────────────────────┬─────────────────────────────────────┤
│ Specialty          │ Minor Procedures (000 / 010)│ Major Surgeries (090)               │
├────────────────────┼─────────────────────────────┼─────────────────────────────────────┤
│ PM&R / Pain        │ [[20552]] (Trigger points)  │ [[62362]] (Intrathecal pump implant)│
│                    │ [[20610]] (Joint injection) │ [[63685]] (Spinal cord stimulator)  │
│                    │ [[62323]] (Epidural steroid)│ [[22551]] (Spinal arthrodesis/fusion│
├────────────────────┼─────────────────────────────┼─────────────────────────────────────┤
│ Urology            │ [[52000]] (Cystoscopy)      │ [[50546]] (Lap radical nephrectomy) │
│                    │ [[52005]] (Ureteral cath)   │ [[52601]] (TURP - Prostatectomy)    │
│                    │ [[55700]] (Prostate biopsy) │ [[55866]] (Lap radical prostatectomy│
├────────────────────┼─────────────────────────────┼─────────────────────────────────────┤
│ Otolaryngology     │ [[31575]] (Diag laryngoscopy│ [[31360]] (Total laryngectomy)      │
│ (ENT)              │ [[31574]] (Larynx injection)│ [[31267]] (Maxillary antrostomy)    │
│                    │ [[31237]] (Nasal debridement│ [[38724]] (Radical neck dissection) │
├────────────────────┼─────────────────────────────┼─────────────────────────────────────┤
│ Ophthalmology      │ [[67820]] (Trichiasis epil) │ [[66984]] (Cataract surgery w/ IOL) │
│                    │ [[65222]] (Corneal FB rem)  │ [[67036]] (Pars plana vitrectomy)   │
│                    │ [[66821]] (YAG capsulotomy) │ [[65850]] (Trabeculectomy)          │
├────────────────────┼─────────────────────────────┼─────────────────────────────────────┤
│ General / Ortho    │ [[10060]] (Simple I&D)      │ [[49000]] (Exploratory laparotomy)  │
│                    │ [[11104]] (Punch biopsy)    │ [[27447]] (Total knee arthroplasty) │
│                    │ [[29881]] (Knee meniscectomy│ [[27130]] (Total hip arthroplasty)  │
└────────────────────┴─────────────────────────────┴─────────────────────────────────────┘

1. Physical Medicine & Rehabilitation (PM&R) and Interventional Pain

• Minor Procedures (000 / 010):
  • 20552 / 20553 — Injection(s); single or multiple trigger points, 1–2 / 3+ muscle groups (000 days).
  • 20610 / 20611 — Arthrocentesis, aspiration, and/or injection; major joint or bursa (000 days).
  • 62322 / 62323 — Injection, interlaminar epidural or subarachnoid, lumbar/sacral (000 days).
  • Rule: Same-day E/M requires modifier -25 and documentation of a comprehensive evaluation distinct from the standard injection positioning/prep.
• Major Procedures (090):
  • 62362 — Implantation or replacement of programmable intrathecal pump (090 days).
  • 63685 — Insertion or replacement of spinal neurostimulator pulse generator or receiver (090 days).
  • Rule: Pre-implantation cognitive decision encounter billed with modifier -57; 90-day global covers routine incision checks and suture removal.

2. Urology

• Minor Procedures (000 / 010):
  • 52000 — Cystourethroscopy (separate procedure) (000 days).
  • 52005 — Cystourethroscopy with ureteral catheterization (000 days).
  • 55700 — Biopsy, prostate; needle or punch, single or multiple (000 days).
  • Rule: Diagnostic cystoscopy performed on the same day as an initial consult does not permit modifier -57. If a significant separate E/M is documented, append modifier -25.
• Major Procedures (090):
  • 50546 — Laparoscopy, surgical; radical nephrectomy (090 days).
  • 52601 — Transurethral resection of prostate (TURP) (090 days).
  • 55866 — Laparoscopy, surgical; radical prostatectomy (090 days).
  • Rule: Emergency or urgent inpatient consultations that determine the need for emergent TURP or nephrectomy support modifier -57 appended to 99221–99223 or 99252–99255.

3. Otolaryngology (ENT)

• Minor Procedures (000 / 010):
  • 31575 — Laryngoscopy, flexible; diagnostic (000 days).
  • 31574 — Laryngoscopy, flexible; with injection into vocal cord (000 days).
  • 31237 — Nasal/sinus endoscopy, surgical; with biopsy, polypectomy or debridement (000 days).
  • Rule: Endoscopy performed during a routine clinic visit is inclusive of the decision to scope. An independent E/M problem (e.g., refractory otitis media in a patient scoped for hoarseness) is required to append modifier -25.
• Major Procedures (090):
  • 31360 — Laryngectomy; total, without radical neck dissection (090 days).
  • 31267 — Nasal/sinus endoscopy, surgical; with maxillary antrostomy and removal of tissue (090 days).
  • 38724 — Cervical lymphadenectomy (radical neck dissection) (090 days).
  • Rule: Pre-op decision-making for extensive sinus or oncologic resection supports modifier -57. Postoperative endoscopic debridement (31237) during the 90-day global requires modifier -58 if planned/staged.

4. Ophthalmology

• Minor Procedures (000 / 010):
  • 67820 — Correction of trichiasis; epilation, by forceps only (000 days).
  • 65222 — Removal of foreign body, external eye; corneal, with slit lamp (000 days).
  • 66821 — Discission of secondary membranous cataract (after-cataract); laser surgery (YAG capsulotomy) (090 days for Medicare historically / check payer LCD; standard minor laser codes carry 000 or 010).
  • 65855 — Trabeculoplasty by laser surgery (010 days).
  • Rule: Routine slit lamp examination performed as part of a corneal procedure cannot be unbundled.
• Major Procedures (090):
  • 66984 — Extracapsular cataract removal with insertion of intraocular lens prosthesis (090 days).
  • 67036 — Vitrectomy, mechanical, pars plana approach (090 days).
  • 65850 — Trabeculectomy ab externo in absence of previous surgery (090 days).
  • Rule: Preoperative surgical clearance and IOL calculation visits that culminate in the decision for cataract extraction support modifier -57 when performed within 1 day of surgery.

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Inpatient vs. Outpatient Dynamics (ProFee vs. Facility)

For hospital inpatient professional fee coding, coders must separate Physician Global Period Rules from Hospital Facility Reimbursement:

┌────────────────────────────────────────────────────────────────────────┐
│               PROFESSIONAL (PROFFEE) VS. FACILITY (MS-DRG)             │
├──────────────────────────┬─────────────────────────────────────────────┤
│ Dimension                │ Inpatient Professional Fee (Part B)         │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Payment System           │ Medicare Physician Fee Schedule (MPFS)      │
│ Global Package Concept   │ YES — 000, 010, 090 Day Rules Apply         │
│ Post-Op Hospital Rounding│ BUNDLED into surgeon's 090 global fee       │
│ Unrelated Medical Care   │ Medical hospitalist bills [[99231]]–[[99233]]│
│ Return to OR for Bleed   │ Surgeon bills code + Modifier [[-78]]       │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Dimension                │ Hospital Inpatient Facility (Part A)        │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Payment System           │ Inpatient Prospective Payment (IPPS/MS-DRG) │
│ Global Package Concept   │ NO — Reimbursed per Inpatient Stay (DRG)    │
│ Post-Op Hospital Care    │ Covered under base MS-DRG payment           │
│ Return to OR for Bleed   │ Triggers OR Procedure CC/MCC DRG shift      │
└──────────────────────────┴─────────────────────────────────────────────┘

Inpatient Co-Management & Concurrent Care Rules

1. Surgeon Inpatient Rounding:
   • The primary surgeon cannot bill Subsequent Hospital Care (99231–99233) or Inpatient Discharge Management (99238 / 99239) during the 90-day global period for normal recovery.
2. Hospitalist Medical Co-Management:
   • A medical hospitalist managing distinct systemic medical conditions (e.g., acute decompensated heart failure, diabetes ketoacidosis, chronic kidney disease exacerbation) during the surgical stay can bill Subsequent Hospital Care without modifiers, provided their diagnosis codes reflect the distinct medical management.
3. Surgical Complications Managed by Hospitalists:
   • If a hospitalist is consulted to manage medical complications (e.g., post-op pneumonia J18.9, deep vein thrombosis I82.401), they report the appropriate inpatient E/M code linking the medical complication.

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2026 Audit Defense & Compliance Checklist

To ensure compliance during Medicare Recovery Audit Contractor (RAC), Unified Program Integrity Contractor (UPIC), or commercial payer audits:

• Global Days Verification: Cross-reference the procedure code against the CY 2026 MPFS Relative Value File to confirm whether the global period is 000, 010, or 090.
• Modifier 57 vs. 25 Accuracy: Ensure Modifier -57 is used exclusively for 090 major surgeries and Modifier -25 is used exclusively for 000/010 minor surgeries or distinct non-decision services.
• Timing of Decision for Surgery: Confirm that Modifier -57 documentation explicitly shows the initial decision for major surgery was formulated on the day of or the calendar day immediately preceding the surgery.
• Separate Identifiable E/M Documentation: For Modifier -25, verify that the medical record contains a clearly distinct history, examination, and medical decision-making (MDM) addressing a condition separate from the routine minor procedure preparation.
• Modifier 58 Staged Procedure Criteria: Confirm that subsequent surgical notes during the 90-day window substantiate that the secondary procedure was (a) prospectively planned, (b) more extensive than the initial procedure, or (c) for therapy following a diagnostic surgical procedure.
• Modifier 78 OR Location Rule: Confirm that any procedure billed with Modifier -78 was performed in an Operating Room suite, endoscopy suite, or cardiac catheterization lab; bedside complication debridements are bundled and non-billable under 78.
• Split Care Synchronization: When billing surgical care only (Modifier -54), ensure formal written transfer of care agreements exist with the physician assuming postoperative care (Modifier -55).
• Teaching Physician Attestation: When residents participate in major surgery, ensure the teaching physician operative note documents direct physical presence during all critical or key portions of the operation per Modifier -GC rules.

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Related Notes & Vault Hierarchy

Specialty & Guidelines MOCs

• 00 Inpatient ProFee Coding MOC — Master Map of Content for Inpatient Professional Fee Coding
• Global Surgical Package MOC — Master Guide for Global Surgical Period Modifiers
• CMS Medicare Guidelines for Inpatient — Inpatient Regulatory Guidelines
• Co-Surgeries — Co-Surgery Rules for Modifier -62
• Modifier -25 vs -57 — In-depth E/M Unbundling Guide

Evaluation & Management (E/M) Notes

• Initial Hospital Care — CPT 99221–99223 Coding & Guidelines
• Subsequent Hospital Care — CPT 99231–99233 Daily Rounding Guidelines
• Discharge Services — CPT 99238–99239 Discharge Management
• Consultation Codes — CPT 99252–99255 Inpatient Consultations
• Critical Care Codes — CPT 99291–99292 Critical Care Management

Modifiers Reference

• -25 — Significant, Separately Identifiable E/M Service
• -57 — Decision for Major Surgery
• -24 — Unrelated E/M During Postoperative Period
• -58 — Staged or Related Procedure by Same Physician During Global Period
• -78 — Unplanned Return to Operating/Procedure Room for Related Procedure
• -79 — Unrelated Procedure by Same Physician During Postoperative Period
• -54 — Surgical Care Only
• -55 — Postoperative Management Only
• -56 — Preoperative Management Only
• -62 — Two Surgeons (Co-Surgery)
• -FT — Unrelated Critical Care During Global Period
• -FS — Split/Shared Evaluation and Management Visits
• -GC — Teaching Physician Services