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Creatine, 24-Hour Urine
Test Code592
CPT Codes
82540, 82570
Includes
Creatinine
CPT code 81050 may be added at an additional charge for volume measurement
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
3 mL urine from a 24-hour collection - no preservative
Minimum Volume
2 mL
Instructions
Submit 24-hour urine in a plastic, leakproof container. Do not use preservatives. Keep refrigerated during collection. Freeze immediately. Please specify on the request form and on the urine container the total 24-hour urine volume. Freeze and ship frozen.
Transport Temperature
Frozen
Specimen Stability
Room temperature: 4 hours
Refrigerated: 24 hours
ozen: 90 days
Refrigerated: 24 hours
ozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received thawed • Received refrigerated • Received room temperature
Methodology
Colorimetric (C) • Enzymatic
Setup Schedule
P.M. Sets up 5 days a week.
Clinical Significance
Creatine, produced by the liver, is essential for metabolism of the brain and muscles. Creatine is converted to creatinine and excreted.