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OSMOLALITY, urine (087-0674)
Test Mnemonic:


Specimen Requirements:

Random urine.  Plain tube or plastic container with tight-fitting lid  


Plain tube or plastic container with tight-fitting lid  


 Delivered to Sample Management within 2 hours of collection.

Specimen Preparation:

Specimen should be refrigerated within 2 hours of collection.



Refrigerated ≤24 hours.

Causes for Rejection:

Specimen collected in container with 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: 8 hours; ASAP: 4 hours; STAT: 1 hour


Freezing Point Depression


Clinical Chemistry

Patient Preparation :

Patient should be well hydrated prior to urine collection.

CPT 4 Code:


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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