The Global Period: One of the Most Confusing Parts of Surgical Billing
Most surgeons understand how to operate. Far fewer fully understand the global period.
And honestly, that is not because surgeons are unintelligent.
The rules are confusing, inconsistent, and full of exceptions.
Yet these rules directly affect reimbursement every single day.
What is a global period?
The global period is the timeframe after a procedure during which certain related services are considered included in the original surgical payment.
In other words: you may still be doing work after surgery, but that work may already be bundled into the original CPT reimbursement.
Most procedures fall into one of three categories:
- 0-day global
- 10-day global
- 90-day global
Major operations typically carry a 90-day global period.
What is usually included?
For major surgery, the global package generally includes routine post-op visits, routine wound checks, dressing changes, suture removal, and uncomplicated post-operative care.
That means you usually cannot separately bill for those encounters.
This is where many younger providers become frustrated. They are seeing the patient repeatedly, documenting carefully, answering questions, and managing recovery, yet much of that work is already bundled.
Where things become complicated
The confusion starts when patients develop complications, new diagnoses, unrelated problems, returns to the OR, staged procedures, or new operations during the global period.
That is where modifiers suddenly become critically important.
Modifier 24
Modifier 24 is used when you perform an unrelated E/M service during the post-operative global period.
Example: you repaired a patient's ventral hernia two weeks ago. Now they present with new right upper quadrant pain and acute cholecystitis.
That evaluation may be separately billable because it is unrelated to the original surgery.
Modifier 78
Modifier 78 is used when a patient requires an unplanned return to the operating room for a related problem during the global period.
Example: post-operative hemorrhage requiring return to the OR.
This modifier tells the payer: this was related to the original surgery, but required another operation.
Modifier 79
Modifier 79 is different. This is used when the patient undergoes a completely unrelated procedure during the global period.
Example: the patient recently underwent colectomy, then later presents with symptomatic gallbladder disease requiring cholecystectomy.
Different pathology. Different operation. Different problem.
Modifier 58
Modifier 58 is commonly misunderstood.
This modifier is used for planned staged procedures, more extensive procedures, or therapy following a diagnostic operation.
This is especially common in trauma, vascular, plastics, wound management, and oncology-related surgery.
Why surgeons get frustrated
The problem is that surgeons are still doing enormous amounts of work during the global period.
Phone calls. Chart review. Wound management. Complication management. Family discussions. Care coordination.
But many providers do not fully understand which portions are billable versus bundled.
That leads to lost reimbursement, denied claims, coding inconsistency, and frustration between surgeons and billing departments.
The bigger problem
Most surgical training programs spend almost no time teaching coding.
Residents can perform complex operations before they ever truly understand global periods, modifiers, MPPR reductions, or bundled procedures.
Yet these rules directly affect physician compensation and hospital revenue.
Final thought
Modern medicine is complicated enough already.
Providers should not have to spend hours digging through payer manuals trying to determine whether something falls inside or outside the global period.
That is one of the reasons we built FreeCPTCodeFinder.com.
The goal was simple: help providers quickly identify CPT codes, wRVUs, modifiers, bundling logic, and case-building workflows without wasting hours searching through outdated coding forums and PDFs.
Because surgeons should spend their time taking care of patients, not fighting billing confusion after midnight.
Check the global period before you bill the case
Use Free CPT Code Finder to search CPT codes, compare wRVUs, review modifier logic, and build cleaner surgical billing workflows.
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