Final answer:
In an Inpatient Rehabilitation Facility (IRF), the MD is required to visit patients a minimum of three times per week, according to CMS guidelines.
Step-by-step explanation:
The question relates to the frequency of medical doctor (MD) visits to patients in an Inpatient Rehabilitation Facility (IRF). According to the Centers for Medicare & Medicaid Services (CMS), the MD must visit patients in an IRF at least three times per week to provide face-to-face assessments and management of the patient's care. This requirement ensures that patients receive timely and appropriate medical supervision as they participate in an intensive rehabilitation therapy program. While the exact frequency can be more if the patient’s condition warrants it, the minimum is still three visits per week, none of the options provided (once a week, twice a month, as needed, every day) directly match the correct frequency mandated by CMS guidelines.