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CREATININE, urine (087-0537)
Test Mnemonic:


Specimen Requirements:

24-hour Specimen - Discard the first early morning specimen. Start timing from this point. Collect all urine voided during the next 24 hours. Note the time that the last specimen is collected during this 24-hour period. This is the finish time that should be recorded on the lab request slip. Random Specimen - 10 mL plastic specimen cup with tight-fitting lid. (Min: 1mL of urine).  


Refrigerated until delivered to Sample Management.

Specimen Preparation:

All samples should be stored refrigerated during collection and until delivered to the laboratory.


Refrigerated for ≤5 days, Frozen for indefinite.  

Causes for Rejection:

Specimen collected in container with a preservative, incomplete and/or incorrect sample identification, improper storage/transport                                                            

Reference Range:

By report (reports may vary based on instrumentation, patient age and sex).

Turnaround Time:

Routine: 4 hours; STAT: 1 hour.


Spectrophotometric Two-point Rate Reaction


Clinical Chemistry  

CPT 4 Code:



24-hour Urine: Include start date and time, finish date and time, and total volume on request form.

If applicable, state clinical information that is required to be provided with specimen.

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
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