The surgical global package is a single bundled payment that covers the surgery itself plus most pre-operative, intra-operative, and post-operative services the surgeon provides during a defined window of time. Understanding exactly what falls inside (and outside) that bundle is essential for correct billing, because services included in the package cannot be billed separately.
How Global Period Length Works
Every procedure on the Medicare Physician Fee Schedule is assigned a global period. The three main categories are 0-day, 10-day, and 90-day. Procedures with a 0-day or 10-day global period are classified as minor surgical procedures. Procedures with a 90-day global period are classified as major surgical procedures.
For major procedures (90-day), the global period includes the day before surgery, the day of surgery, and the 90 days that follow. For minor procedures (0-day and 10-day), the global period begins on the day of surgery itself. Some procedures are assigned codes like XXX, YYY, ZZZ, or MMM, meaning the global surgery concept does not apply to them at all.
Pre-Operative Visits
For major procedures, pre-operative visits are included starting the day before surgery, once the decision to operate has already been made. For minor procedures, only the visit on the day of surgery is included. Any evaluation and management visits that took place before the decision to operate, such as the initial consultation that led to recommending surgery, are not part of the global package and can be billed separately.
Intra-Operative Services
All services that are a usual and necessary part of performing the surgical procedure are bundled into the global fee. This includes the surgery itself, local or regional anesthesia administered by the surgeon, and any routine intra-operative work like achieving hemostasis or closing the wound. If a service is considered standard for that particular operation, it’s included.
Post-Operative Visits and Care
Follow-up visits during the global period that are related to recovery from the surgery are included. For a 90-day global procedure, that means routine post-op checks for up to three months after the operation are part of the original payment. For a 10-day global procedure, follow-up visits within those 10 days are bundled in.
Post-surgical pain management provided by the surgeon is also included. So are a wide range of routine post-operative tasks: dressing changes, local incisional care, removal of the operative pack, and removal of sutures, staples, lines, wires, tubes, drains, casts, and splints. Insertion, irrigation, and removal of urinary catheters, routine peripheral IV lines, nasogastric tubes, and rectal tubes all fall inside the package. Changes and removal of tracheostomy tubes are included as well.
Complications That Don’t Require the OR
If a complication arises during the global period and the surgeon can manage it without returning to the operating room, that care is included in the global package. This covers additional medical or surgical services the surgeon provides to address the complication in the office or at the bedside. The key distinction is whether a return trip to the operating room is necessary. If it is, different billing rules apply.
Supplies
Routine supplies are included in the global surgical fee, with certain exceptions. Standard items like sutures, gauze, and basic wound care materials are bundled in. Supplies that are specifically identified as exclusions by Medicare (such as certain costly implantable devices or take-home supplies, depending on the payer) can be billed separately, but the default assumption is that typical surgical supplies are part of the package.
What Is Not Included
Several categories of services fall outside the global package and can be billed on their own. If a less extensive procedure fails and a more extensive procedure becomes necessary, the second procedure is separately payable. Immunosuppressive therapy for organ transplants is excluded. Critical care services unrelated to the surgery, where a seriously injured or burned patient requires constant physician attendance, are also excluded.
Evaluation and management visits during the global period that are clearly unrelated to the surgery (for example, managing a completely separate medical condition) are not part of the global package. These require proper documentation and the correct modifier to demonstrate that the visit had nothing to do with the surgical recovery.
Modifiers for Billing During a Global Period
When a legitimate service needs to be billed separately during an active global period, specific modifiers tell the payer why the charge is appropriate.
- Modifier 58 is used for staged or related procedures that were planned at the time of the original surgery, that are more extensive than the original procedure, or that represent therapy following a diagnostic surgical procedure. Medicare requires a return to the operating room for this modifier. A new global period begins with the subsequent procedure, and reimbursement is typically at the full allowed amount.
- Modifier 78 is used for an unplanned return to the operating room to treat a complication of the original surgery. Examples include post-surgical infection requiring OR debridement or hemorrhage after surgery. This modifier does not reset the global period from the original procedure, and reimbursement is often reduced to the intra-operative portion of the fee (typically 70 to 90 percent of the full allowed amount, depending on the carrier).
- Modifier 79 is used for an unrelated procedure performed by the same surgeon during the global period. The new procedure is usually linked to a different diagnosis, a new global period begins, and reimbursement should be at 100 percent of the allowed amount.
Choosing the wrong modifier can result in denied claims or underpayment, so the distinction between planned versus unplanned and related versus unrelated is critical. Modifier 78 in particular carries a financial penalty because the original global fee already included payment for managing complications; the additional reimbursement only covers the intra-operative work of the return trip to the OR.
Why the Global Package Matters for Your Practice
The global surgical package essentially pre-pays the surgeon for a predictable bundle of work. If your office bills separately for a post-op visit that falls within the global window and is related to surgical recovery, the claim will be denied. On the other hand, failing to use the correct modifier when a legitimately separate service is provided means leaving reimbursement on the table. Knowing exactly which services are inside the bundle, and which ones qualify for separate payment, is the foundation of compliant surgical billing.