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Osmolality, Serum
Test CodeOSM
CPT Codes
83930
Preferred Specimen
1.0 mL of whole blood (0.5 mL of serum or plasma)
Minimum Volume
0.2 mL of whole blood (0.1 mL of serum or plasma)
Transport Container
Serum Separator (gold top), Lithium Heparin (mint top)
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 3 hours
Refrigerated: 3 days
Frozen: 7 days
Refrigerated: 3 days
Frozen: 7 days
Methodology
Freezing Point Depression
Setup Schedule
Daily
Report Available
Inpatient Turn around time: Stat 45 minutes, routine 3 hours. Outpatient testing received by noon will be reported by 4:30 p.m. Specimens received after noon will be reported by the next morning.