Crystal's MCW Coder HubGlobal Surgical Package MOC
What Is the Global Surgical Package?
The global surgical package (also called the global surgery package) is a CMS and AMA concept that bundles payment for all services considered part of a single surgical procedure into one fee. It covers three phases of care: pre-operative, intra-operative, and post-operative — paid as a single allowable amount to the operating surgeon.
Understanding the global package is the foundation of surgical coding. Every modifier in this MOC exists to identify a service that falls outside of that bundled payment — a legitimate reason to bill separately.
The Three Global Period Windows
| Period | Duration | What Is Bundled |
|---|---|---|
| Pre-operative | 1 day before surgery (90-day global only) | History, exam, and counseling related to the upcoming surgery |
| Intra-operative | Day of surgery | All services normally required to complete the procedure |
| Post-operative | 0, 10, or 90 days after surgery depending on procedure | Follow-up visits related to recovery, typical complications, and wound care |
0-day global: Only the day of the procedure is bundled — no pre-op or post-op window. 10-day global: Day of procedure + 10 post-op days bundled. 90-day global: 1 day pre-op + day of procedure + 90 post-op days bundled.
What Is Always Included in the Global Package (Cannot Be Billed Separately)
- Pre-operative visits the day before surgery (90-day global procedures).
- Intra-operative services that are a normal part of the surgery.
- Complications that do not require a return to the OR (treated in office or bedside).
- Post-operative follow-up visits directly related to recovery during the global period.
- Typical post-op pain management.
- Routine supplies and wound care during the global period.
- E/M services by the operating surgeon related to the surgical condition during the global period.
What Can Be Billed Separately (With the Right Modifier)
This is where the modifier family comes in. Each modifier below unlocks a specific type of separately billable service during or adjacent to the global period.
Cluster 1 — Surgical Care Split Modifiers
Used when the pre-operative, intra-operative, and post-operative care is divided between different providers.
| Modifier | Note Link | Summary |
|---|---|---|
| -54 | CPT Modifier 54 - Surgical Care Only | Surgeon performs the operation only; does not provide pre-op or post-op care |
| -55 | CPT Modifier 55 - Postoperative Management Only | Provider takes over post-op care only; did not perform the surgery |
| -56 | CPT Modifier 56 - Surgical Care Only; Guidelines, usage, and billing | Provider performed pre-op management only; did not perform the surgery |
Key rule: When modifier 54 is used by the operating surgeon, modifiers 55 and/or 56 must be used by the respective providers taking over those phases of care. The global package must be fully accounted for.
Cluster 2 — E/M Services Adjacent to or During the Global Period
Used when a legitimate E/M service falls within the bundled window but deserves separate payment.
| Modifier | Note Link | When to Use |
|---|---|---|
| -25 | CPT Modifier 25 - Significant Separately Identifiable E/M | Significant, separate E/M on the same day as a 0-day or 10-day global procedure |
| -57 | CPT Modifier 57 - Decision for Surgery | E/M on the day of or day before a 90-day global surgery where the decision for surgery was made |
| -24 | CPT Modifier 24 - Unrelated E/M During Post-Op Period | E/M during the post-op period for a condition completely unrelated to the surgery |
Quick rule: 25 = same-day, minor global. 57 = pre-op day, major global. 24 = during post-op, unrelated condition.
Cluster 3 — Procedures Performed During the Post-Op Period
Used when a procedure falls within the global window but qualifies for separate reimbursement.
| Modifier | Note Link | Related or Unrelated | New Global Period? |
|---|---|---|---|
| -58 | CPT Modifier 58 - Staged or Related Procedure | Related — staged, more extensive, or required by original surgery | Yes |
| -78 | CPT Modifier 78 - Unplanned Return to OR | Related — unplanned complication of original surgery | No — stays in original global |
| -79 | CPT Modifier 79 - Unrelated Procedure During Post-Op Period | Unrelated to original surgery | Yes |
| -77 | CPT Modifier 77 - Repeat Procedure by Another Physician | Same procedure, different provider | Yes (for repeating provider) |
Key distinction: 58 vs. 78 — both are related to the original surgery, but 58 was planned/staged (new global) and 78 was unplanned/complication (no new global).
Full Modifier Decision Tree
Is a service falling within or adjacent to a global surgical period?
│
├── Is it an E/M service?
│ │
│ ├── Same day as a 0-day or 10-day global procedure
│ │ └── → Modifier 25 (significant, separate E/M)
│ │
│ ├── Day of or day before a 90-day global surgery
│ │ └── Was this the visit where surgery was decided?
│ │ ├── Yes → Modifier 57
│ │ └── No → Bundled (do not bill separately)
│ │
│ └── During post-op period
│ ├── Related to the surgery → Bundled (do not bill separately)
│ └── Unrelated to the surgery → Modifier 24
│
└── Is it a Procedure?
│
├── Is the global package being split between providers?
│ ├── Surgery only → Modifier 54
│ ├── Post-op care only → Modifier 55
│ └── Pre-op management only → Modifier 56
│
└── Is the procedure during the post-op period?
├── Related + Planned/Staged/More Extensive
│ └── → Modifier 58 (new global period begins)
│
├── Related + Unplanned Complication + Return to OR
│ └── → Modifier 78 (no new global period)
│
├── Unrelated to original surgery
│ └── → Modifier 79 (new global period begins)
│
└── Repeat of same procedure by a DIFFERENT provider
└── → Modifier 77 (new global for repeating provider)
Common Mistakes to Avoid
- Using modifier 57 with a minor (0-day or 10-day) procedure — use modifier 25 instead.
- Using modifier 25 with a 90-day global surgery on the day of surgery — use modifier 57 if it was the decision-making visit.
- Using modifier 78 for a staged/planned return to the OR — use modifier 58 if the return was anticipated.
- Using modifier 79 for a complication-related procedure — modifier 79 is for unrelated procedures; use modifier 78 for complications.
- Billing a separate E/M for routine post-op follow-up — this is always bundled, regardless of modifier.
- Using modifier 55 without the operating surgeon using modifier 54 — the global must be fully accounted for when splitting care.
- Forgetting that modifier 78 does NOT start a new global period — the original global continues.
- Forgetting that modifiers 58, 79, and 77 DO start a new global period.