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URINE OSMOLALITY

Message
Specimen Requirement: Collect a random urine sample in a urine sterile cup. Immediate Specimen Processing: Transfer urine to BD Clear no additive tube and send to the lab. Do not send the urine collection cup to the lab. Ambulatory Transport Temperature to Inova Central Lab: Refrigerated


Test Code
LAB420 UOSMO


Alias/See Also
UOSMO


CPT Codes
83935

Instructions
Minimum Testing Volume: 0.1 mL Transport Temperature: Refrigerated Stability: Ambient: 24 hours (all sites except Mount Vernon); Mount Vernon: 1 hourRefrigerated : 24 hours (all sites except Mount Vernon): Mount Vernon: 7 daysFrozen: Not Defined Causes for Rejection: Contaminated samples, preservatives, unlabeled, mislabeled, wrong tube type, hemolyzed, QNS, exceeds specimen stability requirements.


Report Available
STAT 1-Hours|Timed 1-Hours|Routine 2-Hours|STAT 4-Hours|Timed 4-Hours|Routine 24-Hours


Clinical Significance
1230130229



Last Updated: May 18, 2026


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.