The basis of payment for retrospective payment systems is?

The basis of payment for retrospective payment systems is the actual costs incurred during care. In this model, healthcare providers are reimbursed after services have been rendered, based on the actual expenses they incurred in delivering care to patients. This allows providers to submit claims that detail the services performed and the associated costs.

Retrospective payment systems emphasize accountability and transparency, ensuring that healthcare providers are compensated for the specific resources and efforts expended in patient care, thus reflecting the true expenditure of the healthcare services provided. This can often lead to variations in reimbursement depending on the complexity of the cases, the length of hospital stays, and the treatments performed.

In contrast, other payment models such as flat fees or capitated payments do not hinge on actual incurred costs but rather set predefined amounts for services or a fixed rate per patient regardless of the services used. Future projections of costs are also not relevant in this context as they pertain to predictive models rather than an assessment of expenses incurred. This distinction solidifies the rationale behind why actual costs are pivotal in retrospective payment systems.