Under the global period of surgical billing, a significant portion of surgical care is bundled into a single payment. That care includes pre-operative, intra-operative, and post-operative services. While this simplifies reimbursement on the surface, it also creates potential blind spots in surgical revenue cycle management (RCM) when the services rendered are truly separate from the global post-op period. The issue isn’t necessarily the post-op rules themselves, but how those rules are interpreted, documented, coded, and executed across clinical and billing teams.
Without the right revenue cycle management team for surgeons (both general and specific), missed fee-for-schedule post-op services can compound into substantial financial loss. On the flipside, abuse of postoperative modifiers that separate a service incorrectly from the surgery exposes the practice to compliance problems.
What the Global Surgical Period Does Include
Let’s establish clarity on what’s truly bundled—and what isn’t.
Pre-op, Intra-op, and Post-op Services
According to the Centers for Medicare & Medicaid Services (CMS), the global surgical package includes:
- Pre-operative visits (typically 1 day-before surgery), after the decision for surgery has already been made at a prior visit.
- The surgical procedure itself (intra-operative services that are a usual and necessary part of the procedure).
- Routine post-operative care within 90 days of a major surgery. (10 days for a more minor surgery, same-day limitation for endoscopic procedures).
- Surgical complications. There is a misconception that complications are separate from the included global package. They are not. CMS clearly states that if the complications do not require additional OR services, these are part of the post-op treatment.
- Postsurgical pain management by the surgeon.
Routine Surgical Care vs. Separately Reimbursed Services
Routine care— including the pre-op and post-op visits for uncomplicated recovery—is included in the payment for the surgery itself. These services do not warrant a post-op modifier for separate reimbursemet. That said – there are plenty of instances where the day-before or day-of visit IS separately reimbursable, as well as post-op care for unexpected recovery.
Separate billing may apply when:
- A decision for surgery is made the day-of or day-before the surgery. This often happens for on-call surgeons that care for patients in the Emergency Dept., or make rounds and identify patients with immediate surgical needs. In these cases, the “pre-op” visit is not bundled – as the evaluation and management rendered the decision to proceed with surgery. If that decision were made several weeks in advance, then the day-before or day-of visit should not be covered. In this case, append modifier 57 to the E&M. [An exception to this rule is for minor surgical procedures with a 0-day global period. If there is no condition/diagnosis that makes the service separate from the diagnosis for the endoscopy/minor procedure, it cannot be billed. Modifier 25 should be appended to the E/M in the case of a separate diagnosis.]
- There is a significant, separately identifiable E/M service driven by an unrelated diagnosis. A patient may have had a knee replacement, for example, and still need to be seen by the physician to address tendon injuries, bursitis, or any number of unrelated conditions. These are reimbursable services. Append modifier 24 to the E/M.
- A planned or unexpected return to the operating room is required. Both staged and unexpected surgeries within the post-op period must be reimbursed – though careful documentation and coding (modifiers) will dictate reimbursement success. Based on the clinical situation, modifier 58, 78, or 79 would be used (appended to the surgical CPT codes, vs. E/M). Note: Modifier 78 for an unplanned return to the OR for procedure related to the initial surgery, will allow the surgeon to be paid, though at a reduced rate.
- Treatment for the underlying condition or new/additional course of treatment that is not part of a patient’s normal surgical recovery.
- Diagnostic tests – X-Rays, etc. remain separately reimbursable..
- A less extensive surgery was performed and failed; which necessitates a second, more intensive procedure that is separately reimbursable.
Source: Medicare Claims Processing Manual
Common Misconceptions Among Surgeons and Staff
This is where breakdowns begin:
- “Everything post-op is included” mindset. While this line of thinking certainly simplifies the billing process – it can actively undermine the revenue rightfully earned by the physician. There are many situations that warrant separate billing, as defined above.
- Apprehension or misunderstanding around global modifiers like -24, -57, -58, -78, -79. Each of these modifiers is nuanced, but they are important reimbursement tools. When documentation is clear and the patient’s care is outside of the scope of the bundled period – then these modifiers must be employed. Oftentimes we see a hesitation to use these out of compliance concerns, or a simple misunderstanding of the differences – but if services are properly documented, they should be paid. Conversely, even if a service should pay and is separate from the global package, choosing the incorrect modifier can result in denials or reduced reimbursement.
- Lack of alignment between schedulers, surgeons, coders, and billing teams. This item is likely the biggest ticket concern. In order for a non-bundled service to get paid, the clinician must clearly document the distinction, the coder must apply the appropriate modifier, and the billing team must have the awareness to flag missed modifiers.
Billing Team Limitations
Even high-performing practices struggle with failing to identify unrelated or distinct services; missed documentation for complex cases; and inconsistent interpretation of surgical global period rules.
Over time, these small misses can stack up—resulting in thousands (or more) in lost revenue.
Not all billing teams are built for surgical complexity.
Generalist billing vendors may:
- Miss nuanced coding opportunities
- Rely too heavily on automation
- Lack deep expertise in RCM challenges for surgeons.
This is where specialized outsourced surgical billing services become critical. Experience matters.
How to Capture Revenue That’s Often Missed in the Global Period
Align Clinical and Billing Workflows
This is where most practices fall short—and where Kovo shines.
High-performing RCM systems:
- Educate surgeons on what to flag during encounters.
- Create feedback loops between providers and billing teams.
- Ensure coders interpret clinical intent accurately.
- Keep practitioners aware of changes, such as these updates:
- CPT G0559: CMS introduced HCPCS code G0559 in 2025, which allows a different physician (outside of the surgeon’s practice/group/Tax ID) to be reimbursed for post-operative follow-up visits.
- Transfer of Care Modifiers: CMS requires the use of modifier 54 (surgical care only), 55 (post-op only), and 56 (pre-op only) for all 90-day global packages where the care is split if the physicians are not in the same group practice.
Implement Audit and Review Systems
Consistent auditing is non-negotiable.
Focus on:
- Reviewing all encounters within the global period
- Identifying patterns of missed billing opportunities
- Tracking payer-specific behaviors
- Analyze denial trends, payer policies, coding patterns
The Kovo Approach to Surgical RCM
At Kovo, we don’t just “process claims”—we uncover what others miss.
Our approach to RCM for surgeons is built on:
- Deep specialization in surgical workflows
- Human-led review layered on top of smart automation
- Continuous auditing within the global period
- Tight alignment between clinical documentation and billing execution
In surgical RCM, success isn’t about working harder—it’s about seeing what others overlook.
How Kovo RCM Helps Surgeons Recover and Protect Revenue
At Kovo RCM, we go beyond traditional billing—we act as a strategic partner in protecting and growing your surgical revenue.
Specialized expertise in surgical RCM
We understand the complexities of global period billing across specialties and payer rules. That means fewer missed opportunities and more confident claim submissions.
Proactive revenue identification
Our team actively audits post-operative encounters to uncover missed charges, underbilling patterns, and denial risks—before they impact your bottom line.
Human-driven, tech-enabled approach
We combine experienced RCM professionals with smart technology to enhance accuracy and oversight—not replace it. Every claim is reviewed with intention.
End-to-end support
From documentation guidance to appeals, denial management, and payer follow-ups, we cover the full revenue cycle so nothing slips through the cracks.
A true partnership mindset
We operate as an extension of your practice, providing transparent reporting and actionable insights that help you make better financial decisions over time.