CREATININE, SERUM

What this test checks

Measures creatinine, a waste product your kidneys filter out. When kidneys aren't working well, creatinine builds up in the blood.

Why do people get this test?

Essential for diagnosing and monitoring kidney disease. Also used before contrast scans and certain medications to make sure kidneys can handle them.

When you should consider this test

• Diabetes, high blood pressure, or family history of kidney disease
• Swelling in legs or face
• Before a CT scan with contrast

How to prepare

No fasting needed.