OSMOLALITY, urine (087-0674)
CPT 4 Code: 83935
Test Order Mnemonic: OSMO U
Lab: Clinical Chemistry
Request Form: Routine Chemistry Form 1
Patient Preparation: Patient should be well
hydrated prior to urine collection.
Collection: Random urine
Storage Instructions: Refrigerate at 2-8°C.
Causes for Rejection: Improperly labeled specimen
Availability: Samples are received 24 hours per day at Sample
Management, 5.136 McCullough.
Turnaround Time: Routine: 4 hours; STAT: 1 hour
Specimen: Urine
Volume 10 mL
Minimum Volume: 1 mL urine
Container: Plain tube or plastic container with tight-fitting
lid
Reference Ranges: 38-1400 mOsm/kg
Test Method: Freezing Point Depression
