What can an eGFR test tell you?
The eGFR indicates how effectively your kidneys are filtering blood. An eGFR above 90 mL/min usually reflects normal function, while 60 to 89 mL/min may still be normal (particularly with aging) if no other evidence of kidney damage is present. An eGFR lower than 60 that persists for three months or more typically signals chronic kidney disease, and an eGFR lower than 15 suggests kidney failure.
Clinicians use eGFR to stage CKD, monitor its progression over time, and guide medication dosing for drugs cleared by the kidneys.
What is being tested?
eGFR is a calculated value, not a direct lab measurement. The most widely used equations estimate GFR from your age, sex, and serum creatinine concentration.
Modern practice favors race‑free equations to reduce bias while maintaining accuracy. Results are normalized to a standard body surface area of 1.73 m² to allow comparison across people of different body sizes.
Where is the eGFR test typically included?
An eGFR test is usually included in a basic or comprehensive metabolic panel, in which serum creatinine is measured, and then eGFR is calculated automatically. This test is also usually part of CKD monitoring panels, often paired with urine albumin‑to‑creatinine ratio (uACR) to assess kidney damage.
eGFR testing is included as part of lab testing through Hers, designed to support a clearer understanding of your health. Results should always be reviewed with a qualified healthcare provider to guide next steps.
Who should get an eGFR test?
There are no universal screening recommendations for low‑risk, asymptomatic adults. eGFR testing is recommended for those at higher risk of CKD, including people with diabetes, high blood pressure, or heart disease, and those with a family history of kidney disease or a history of acute kidney injury.
