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Test Code UOSMO Osmolality, Urine LAB420

Test Method

Freezing Point Osmometry; Osmo I, Advanced Instruments


Testing is performed Monday through Sunday.

Typically completed within 4 hours after the specimen
arrives at the testing site.

Useful For

Assessing the concentrating and diluting ability of the

Specimen Requirement

2 mL urine is required.

CPT Code Information

83935 Chemistry: Osmolality; urine

Reference Values

0-11 months: 50-750 mOsm/kg
≥12 months: 150-1,150 mOsm/kg

LOINC Code Information

2695-5 Osmolality Of Urine

Additional Specimen Collection Information

Random urine specimen in a tightly capped container. Store
specimen refrigerated at 2-8°C.