Ambulatory surgery centers (ASCs) are modern outpatient facilities designed for same-day surgical care—including many diagnostic and preventive procedures. They give patients a focused alternative to hospital-based outpatient surgery, with convenience, specialized teams, and a strong record of quality outcomes.
This page is a quick guide for patients and families in Michigan. For deeper national research and publications, see the Ambulatory Surgery Center Association (ASCA).
What is an ASC?
ASCs are surgical facilities—not emergency rooms, urgent care clinics, or primary-care offices. Patients typically arrive after working with a physician who has already determined that surgery is the right next step.
Unlike a physician’s office, an ASC has dedicated operating rooms and the staffing, equipment, and protocols needed to perform surgery safely. Unlike a full-service hospital, an ASC concentrates on outpatient procedures, which helps keep the experience more predictable for patients and care teams.
Why patients choose ASCs
Patients and physicians often prefer ASCs because the setting is built around outpatient surgery:
- Convenience — procedures are scheduled around same-day care, with less disruption than an overnight hospital stay when clinically appropriate.
- Specialized teams — staff, equipment, and workflows are focused on the procedures performed most often in that center.
- Value — because ASCs operate at a smaller, more specialized scale than full-service hospitals, they can often deliver care at a lower cost for patients and payers.
Quality and safety
Advances in surgical technique, anesthesia, and pain management mean many procedures that once required a hospital stay—including some total joint replacements—are now performed safely in ASCs.
Like hospital operating rooms, ASCs follow rigorous clinical protocols. Most are Medicare-certified, and many are accredited by independent healthcare organizations. Centers must maintain infection-prevention programs and regularly assess the quality of care they provide.
When it comes to patient safety, the expectation is the same: careful standards, trained teams, and continuous quality improvement. Learn more from ASCA’s overview of quality and safety in ASCs.
Savings for patients and the health system
Because ASCs specialize and operate more efficiently than full-service hospitals, they can reduce costs for Medicare, commercial insurers, employers, and patients—without sacrificing quality.
National analyses compiled by ASCA show substantial savings when clinically appropriate procedures move from hospital outpatient departments to ASCs, including billions in Medicare savings over recent years and meaningful out-of-pocket savings for commercially insured patients on common procedures.
Explore ASCA’s savings research and publications for the latest figures and state-level context.
Protecting access to ASC care
ASCs deliver high-quality care and meaningful savings—but outdated payment and policy rules can limit patient access and reduce future savings for Medicare and taxpayers. National advocacy organizations like ASCA work to keep outpatient surgery accessible and fairly reimbursed.
In Michigan, MASA represents ambulatory surgery centers and the professionals who care for patients in them—supporting education, collaboration, and advocacy so Michigan communities can continue to benefit from ASC care.
For federal policy detail, see ASCA’s summary of ASC legislation.
Find care in Michigan
Ready to find an ambulatory surgery center near you? Search MASA facility members by location and specialty.