Same-day surgery centers—also termed ambulatory surgery centers (ASCs) or outpatient surgery facilities—provide planned procedures that allow patients to return home within 24 hours, making them a critical node in the shift toward value-based, lower-cost care. The global Same Day Surgery Centers market size reached an estimated USD 97 billion in 2025, underpinned by a 5.9% CAGR growth outlook as payers, physicians, and patients favor high-throughput, hospital-independent settings. The market forecast through 2033 anticipates industry expansion to surpass USD 165 billion, propelled by aging demographics, rising chronic disease burden, and payer pressure to migrate high-margin orthopedics, ophthalmology, and GI cases to ASCs. Macroeconomic tailwinds—elevated healthcare inflation, staffing shortages, and insurer bundled-payment programs—cement ASCs as the default low-acuity surgical gateway, accelerating capital flows from corporate investors and health systems alike.