Final answer:
In the DRG system, a comorbid condition refers to the presence of two or more medical conditions in a patient at the same time.
Step-by-step explanation:
In the DRG system, a comorbid condition refers to the presence of two or more medical conditions in a patient at the same time. These conditions can be related to each other or unrelated. They may affect the patient's overall health and require additional medical care and resources. For example, if a patient has both diabetes and hypertension, both conditions would be considered comorbid.