Test Directory

Osmolality, Serum

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Updated Test Information:

Test Description
Osmolality, Serum
Synonym(s)
Osmolality
Test ID
UOSMS
General Information
Useful for:
Evaluating acutely ill or comatose patients
Specimen Type
Serum
Specimen Requirements
SST
Stability
Refrigerated (preferred) 7 days
Frozen 7 days
Ambient 24 hours
Unacceptable Specimen Conditions
Hemolysis Mild OK, Gross OK
Lipemia Mild OK, Gross OK
Icterus NA
Other NA
Methodology
Freezing Point Depression
Estimated TAT
1 day
Testing Schedule
Monday-Sunday
CPT Code(s)
83930
Minimum Sample Volume
0.25 mL
Reference Range
275-295 mOsm/kg
Performing Lab
Mayo
LOINC Code(s)
2692-2