A case mix is impacted by all of the following except:

A case mix refers to the groups of patients treated by a healthcare facility, categorized based on various characteristics such as diagnoses, severity of illness, and resource needs. It plays a crucial role in understanding the patient population and subsequently, the facility’s reimbursement structure.

Sociodemographic factors, such as age, gender, race, and socioeconomic status, directly influence the types of patients a facility sees. These factors can affect patients' health outcomes and the services they require, contributing to the overall case mix.

Patient diagnosis is a fundamental component of the case mix. The diagnosis determines the type of care needed, the complexity of cases, and the coding for reimbursement purposes. Different diagnoses lead to varied treatment plans and resource allocations, further shaping the case mix.

Treatment costs, while relevant in financial discussions, do not directly define the case mix itself. Treatment costs emerge as a function of the case mix and the services rendered. However, they do not affect the categorization of patients based on their diagnoses or related factors directly.

Length of stay, although an important metric in healthcare assessment and management, does not directly alter the case mix composition. Instead, it is an outcome that may result from the case mix. For instance, a higher length of stay could be indicative