Which factor affects DRG determination and payment for inpatient UB-04 claims?

• A. Admission date
• B. Length of stay
• C. Discharge disposition
• D. Hospital bed size

Answer: (B)

Length of stay reflects how much resource use a patient’s care requires. DRGs are assigned based on the diagnoses and procedures performed, with adjustments for complexity such as complications or comorbidities. When a patient stays longer, it often signals greater resource use, which can shift the case to a higher-severity DRG or trigger an outlier payment for unusually long or costly stays. This means the length of stay directly influences both the DRG determination and the total payment amount.

Admission date isn’t a driver of DRG classification. Discharge disposition describes where the patient goes after discharge and doesn’t determine the DRG, though it can affect post-discharge billing. Hospital bed size is a facility characteristic and does not affect how a DRG is assigned or paid.