Final answer:
Treatment should be initiated within 48 hours of admission to an Inpatient Rehabilitation Facility (IRF) to ensure that patients receive intensive rehabilitation services promptly, which is essential for successful recovery.
Step-by-step explanation:
In reference to the time frame in which treatment should be initiated after admission to an Inpatient Rehabilitation Facility (IRF), the correct answer is b) Within 48 hours. This timeframe ensures that patients receive prompt and intensive rehabilitation services that are characteristic of IRF care. Initiating treatment promptly is crucial for the success of the rehabilitation process, as it helps to maximize recovery potential and can lead to better patient outcomes. Therefore, it is commonly expected that IRF patients will receive an initial evaluation and begin their rehabilitation therapy services within 48 hours of admission.