Thank you for your question regarding CMS832v2, Hospital Harm – Acute Kidney Injury. Currently, the measure only evaluates serum creatinine to measure kidney function. Within the ‘Rationale’ section of the header, specific to acute kidney injury diagnosis, serum creatinine levels are the “…most reliable and consistently available electronic data element…”. Additionally, as indicated in the ‘Clinical Recommendations’ section, serum creatinine is “…cited by many guidelines for defining and monitoring acute kidney injury”. Thank you for your suggestions, we will consider further measure refinements during the Annual Update.