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Test Code 08078 Osmolality, 24 Hour Urine

Important Note

 If serum osmolality is being performed in conjunction with urine osmolality, draw serum within 4 hours of urine collection.

Additional Codes

Test Name in EPIC EPIC Test Code Mnemonic
Osmolality, 24 Hour Urine LABOSMO24 UOSMO24

 

Methodology

Osmometer—Freezing Point Depression

Specimen Requirements

Specimen Type: Urine, 24 hr collection

Container/Tube: 24 Hr Urine container well mixed and sent in a urine aliquot tube.

Specimen Volume: 3 mL

Specimen Minimum Volume: 0.5 mL

Collection Instructions: No preservative.

Specimen Transport Temperature

 Stable for 5 days refrigerated or 4 hours at room temperature.
Specimens may be frozen if needed, although, repeated freeze/thaw cycles should be avoided.

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Chemistry-

SMDC Clinical Lab

Fargo Hospital Lab

Test Classification and CPT Coding

83935

Reference Values

300-900 mOsm/kg