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Test Code OS-U Osmolality, Urine

Synonyms/Keywords

Urine Osmo

Specimen Requirements

Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
Urine

Urine Container

or 

Sage Cup

   2 mL 0.5 mL 0.5 mL

Collection/Processing Instructions

Random and Timed urine collections without preservative are acceptable. 

 

If an aliquot from a timed specimen is submitted, the total volume collected must be measured, recorded, and included with the test request.
 

Specimen Stability Information

Specimen Type Temperature Time
Urine Ambient 3 hours
Refrigerated 5 days
Frozen 3 months

Rejection Criteria

Urines with a preservative

Reference Range Information

Performing Location Reference Range
All Performing Sites Random Urines: 50-1200 mOs/kg
24 Hour Urines: 500-800 mOs/kg

Marshfield Labs Performing Department

Marshfield Labs Urinalysis

Performing Information

Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Beaver Dam Monday through Sunday Less than 2 hours Freezing-Point Depression
Weston Monday through Sunday Less than 2 hours Freezing-Point Depression
Eau Claire Monday through Sunday Less than 2 hours Freezing-Point Depression
Park Falls Monday through Sunday Less than 2 hours Freezing-Point Depression
Marshfield Monday through Sunday Less than 2 hours Freezing-Point Depression
Neillsville Monday through Sunday Less than 2 hours Freezing-Point Depression
Minocqua Monday through Sunday Less than 2 hours Freezing-Point Depression

CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
83935        

Outreach CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
83935        

Ordering Applications

Ordering Application Description
Cerner Osmolality Urine