What type of bundling program does Model 1 represent?

Model 1 refers specifically to a bundling program that aligns with retroactive payments based solely on the costs incurred during an acute care hospital stay. This model aggregates the costs associated with various treatment services provided during a patient's hospital admission, rather than considering post-acute care or outpatient services. This approach focuses on improving care coordination during the hospital stay and incentivizing hospitals to manage costs effectively within the acute care setting.

In contrast, the other options represent different aspects of healthcare service delivery. Acute care and post-acute care involve a broader scope that extends beyond the hospital stay, while preventive care services focus on services that aim to prevent illness before it occurs. Emergency care services pertain to immediate treatment for urgent conditions, which is also outside the hospital stay context that Model 1 specifically addresses.