Final answer:
APCs are classified by visit and DRGs are classified by diagnosis.
Step-by-step explanation:
The subject of this question falls under the category of Health.
APCs (Ambulatory Payment Classifications) are classified by visit, while DRGs (Diagnosis Related Groups) are classified by diagnosis.
For example, if a patient goes to a hospital for a specific diagnosis (such as pneumonia), the hospital will assign a DRG based on that diagnosis. On the other hand, if a patient visits an outpatient clinic for a certain procedure (such as an MRI), the clinic will use a specific APC code to classify and bill the visit.