eGFR — CKD-EPI Creatinine Equation (2021)

Calculates estimated glomerular filtration rate (eGFR) using the 2021 CKD-EPI creatinine equation. The 2021 CKD-EPI equation is the KDIGO-recommended formula for adults and eliminates the race coefficient previously used in older versions, providing a single race-neutral calculation. Used for CKD staging, drug dose adjustment, and renal function monitoring.