Creatinine Urine Level Test in Arizona

What this test measures

This test quantifies creatinine in a urine sample, either as a random collection or as part of a timed collection. Creatinine is produced at a fairly steady rate, so its concentration in urine provides information about kidney handling and urine concentration. Urine creatinine is also used as a denominator for ratios such as protein-to-creatinine and albumin-to-creatinine, which help evaluate kidney health. Results are compared with laboratory reference ranges.

A urine sample is collected in a clean container at a partner laboratory. For a random test, a single void is sufficient, while a timed collection captures all urine produced over a set period. The laboratory measures creatinine with a chemistry method, and combining the urine value with a serum creatinine allows calculation of creatinine clearance. Urine volume and specific gravity may be reported to help interpret concentration.

People order this test when kidney function is being evaluated, when monitoring a condition that can affect the kidneys, or when a provider is investigating abnormal protein or albumin in urine. It is a supporting test rather than a standalone diagnosis. A qualified healthcare provider should interpret the result with your blood creatinine, eGFR, and clinical history.