How do SOI and ROM differ, and why are they important in CDI?

• A. SOI is about room occupancy; ROM is about medication reconciliation; both influence billing.
• B. SOI reflects illness severity; ROM reflects mortality risk. Both affect DRG weighting and risk adjustment, guiding documentation efforts to capture true patient complexity.
• C. SOI equals length of stay; ROM equals number of readmissions; both used for staffing.
• D. SOI is about cost; ROM is about patient satisfaction; both determine hospital rating.

Answer: (B)