For years, ambulatory surgery centers (ASCs) have been described as environments designed for “simple surgical care.” We performed efficient procedures on healthy, ambulatory patients with predictable outcomes. That narrative no longer reflects our reality.
While ASCs remain highly efficient by design, the patients themselves have changed. Today’s ASC patients often arrive carrying far more than a surgical diagnosis, such as multiple comorbidities, complex medical histories, implanted devices, and chronic diseases managed through advancing medical technology. The procedures may still be outpatient, but the care is anything but simple.
ASCs are increasingly caring for patients with diabetes, obesity, cardiovascular disease, arrhythmias, anticoagulation therapy, pulmonary disease, and renal impairment, often in combination. These patients may meet inclusion criteria, yet they bring layers of medical complexity that require heightened clinical judgment throughout the surgical encounter.
Heightened Patient & Procedural Complexity Across Sectors
In vascular ASCs, procedural simplicity can mask significant clinical risk, as short, technically straightforward interventions are often performed on patients with profound medical complexity. Advanced cardiovascular disease and tightly scheduled dialysis treatments add layers of coordination that extend far beyond the procedure itself.
What appears simple on the schedule can be anything but simple in practice.
Even postoperative surveillance is more complicated in this population. Tracking infections, for example, is no longer straightforward when a patient’s vascular port is accessed multiple times a week in different care settings. When an infection is identified, it can be difficult to determine whether it originated during the ASC encounter or at a subsequent dialysis visit. One of the oldest expectations in outpatient surgery, tracking postoperative infections, has become a gray, labor-intensive exercise, reflecting the growing disconnect between procedural simplicity and patient complexity.
Consider a scenario that I recently witnessed in an ASC: A patient presents in preop with multiple comorbidities, including diabetes. He wears a Dexcom continuous glucose monitor and is asked to read his blood sugar from the device. The number appears acceptable, and care proceeds.
But that seemingly simple interaction raises important questions:
- Do we accept patient-reported data from personal medical devices?
- Do we validate that reading with a facility glucometer?
- What if the readings don’t match?
- Which value becomes the official data point for clinical decision-making and documentation?
These are not theoretical questions. They represent real-time clinical decisions occurring daily in ASCs across the country, often without clear policy guidance. 
Another common scenario: admitting non-ambulatory patients who require mechanical assistance for transfers and positioning. These patients may have significant obesity, neurologic disease, or stroke-related deficits, introducing real risk to both the patient and staff during movement. Safe care depends on access to appropriate equipment, such as Hoyer lifts, and staff who are trained and competent in their use. ASCs, however, were designed to care for largely ambulatory patients, making mechanical transfer equipment unnecessary in most settings. As patient selection criteria and procedural complexity expand, this design assumption is being challenged. When appropriate equipment and training are lacking, the risk of injury, liability, and adverse outcomes will follow.
This scenario also forces ASCs to balance the Americans with Disabilities Act (ADA) obligations with clinical reality. Providing reasonable accommodation does not eliminate the responsibility to ensure care can be delivered safely within the outpatient setting. When a patient cannot be transferred, positioned, or recovered without undue risk, the question becomes whether the ASC is the appropriate site of care for that patient. That determination should be guided by clear policy and objective criteria, not made on the fly in preop.
Added Layers of Complexity: Policy, Documentation, & Preparedness
Many ASC policies were written for a different patient population—one with fewer comorbidities, less reliance on medical technology, and clearer clinical thresholds. Today’s reality includes continuous glucose monitors, insulin and pain pumps, wearable and implanted cardiac devices, implanted neurostimulators, and patients who actively manage complex chronic conditions.
When policies do not address these realities, staff are left to rely on informal practices and individual judgment in real time. That creates variability, documentation risk, and potential liability, particularly when outcomes are questioned after the fact.
As patient comorbidity increases, preoperative assessment has become more complex and increasingly fragmented. Many ASC patients now see multiple specialists in addition to a primary care provider, raising practical questions about who “owns” the history and physical, who performs the presurgical risk assessment, and who ultimately determines readiness for surgery. The outdated concept of a generic “medical clearance” is giving way to a shared-responsibility model.
At the same time, literature continues to challenge routine preoperative testing for elective surgery in low-risk outpatient settings. We know that preoperative testing works best when it’s targeted, based on a patient’s comorbidities, functional status, medications, and symptoms, rather than ordering routine EKGs or labs just for the sake of it. When testing does not change management, it adds cost, delay, and confusion without improving outcomes. For ASCs, the challenge is defining how thorough preoperative evaluation needs to be while ensuring the assessment is purposeful, defensible, and aligned with the complexity of the patient being treated.
Accrediting organizations are clearly responding to this shift, with frequent revisions and expanded expectations around risk assessment, clinical decision-making, escalation of care, and leadership oversight. However, updating standards or policies on paper does not automatically account for the increasingly complex and nuanced scenarios ASCs now face. Surveyors are no longer satisfied with the mere presence of a policy. They are looking for evidence that reflects how care is actually delivered, and that staff are prepared to navigate gray areas consistently and safely.
The expectation is not perfection or exhaustive policy coverage for every scenario, but intentionality. Clear guidance, documented rationale, and demonstrable leadership engagement signal that an organization understands the complexity of the patients it treats. In today’s ASC environment, compliance is less about checking boxes and more about showing thoughtful alignment between standards, practice, and patient reality.
Don’t forget: None of this matters if it isn’t documented; even thoughtful, appropriate care carries little weight without a clear record.
Adapting to Today’s Risks & Tomorrow’s Demands
None of this suggests that ASCs are unsafe or ill-equipped; on the contrary, they continue to deliver high-quality care with remarkable efficiency. But efficiency should not be mistaken for simplicity. Outpatient does not mean low-acuity, technology does not transfer accountability, and “we’ve always done it this way” is no longer sufficient as patient complexity continues to rise. Today, risk extends well beyond the procedure itself; it is metabolic, medical, pharmacologic, and operational.
It is also worth acknowledging that procedural complexity is rising alongside patient complexity. Each year, Medicare expands the list of procedures eligible for performance and reimbursement in the ambulatory setting. Total joint replacements, advanced spine interventions, and select cardiac and vascular procedures are no longer theoretical conversations for ASCs—they are operational realities. These cases bring longer operative times, greater anesthesia exposure, higher physiological stress, and narrower margins for error. The result is a setting where both the patient and the procedure carry more risk than the ASC model was originally built to absorb, demanding more deliberate systems, oversight, and accountability.
The ASCs that will thrive in this next phase are those willing to acknowledge the shift and respond intentionally by modernizing policies; strengthening clinical decision frameworks; appointing a medical staff that is not only clinically competent, but collaborative and professional; and ensuring leadership is experienced, engaged, and prepared to navigate complexity. There are no simple patients anymore. Delivering safe care now requires intention at every step, from patient selection and preoperative assessment to postoperative follow-up and documentation.
Patient complexity does not announce itself, and risk rarely looks dramatic until it’s too late. The moment we label care as “simple” is often when preventable harm begins. If patients seem more complex than they once did, this experience is not unique. While some centers may not yet feel this shift, most are already responding to it. ASCs are well positioned to meet this challenge, provided systems continue to evolve while remaining grounded in the practices that protect patient safety.
As ASC patient and procedural complexity continue to rise, proactive assessment and precise planning are essential. Connect with VMG Health to learn how targeted policy review, risk assessment, and operational alignment can help your ASC confidently adapt to this evolving reality.
