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Additional Codes
Serum Osmolality
Icon & Photos
Gold Top (SST-Gel)
Specimen Requirements
Preferred:
Container/Tube: Gold Top (SST-Gel)
Minimum Volume: 1 mL
Collection Instructions: N/A
Also Acceptable:
Container/Tube: Other SST Gel, Red Top Tube
Specimen Stability
Ambient: 12 hours
Refrigerate: 48 hours
Frozen: aliquot for longer storage
Reference Range
280-295 mOSM/kg
Methodology
Freezing Point Depression
CPT
83930
Lab Handling
If urine and serum are ordered together, they should be collected within 1 hr of each other.