A urinary creatinine random test is a diagnostic tool used to measure the level of creatinine in a urine sample collected at random times during the day. Creatinine is a byproduct of muscle metabolism and is excreted in urine. The test is used to evaluate kidney function and muscle mass. The test is performed by collecting a random urine sample and measuring the creatinine concentration. The results are compared to reference ranges to determine if the levels are within normal limits. Abnormal levels may indicate kidney dysfunction, muscle disorders, or other medical conditions. The test is simple, non-invasive, and can be performed in a doctor’s office or laboratory.