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HelpTest Code OS,OSU OSMOLALITY SERUM/URINE
Performing Laboratory
Helen Keller Laboratory
Specimen Container:
Red top tube or Serum Separator Tube for serum specimens
Urine cup for urine specimens
Specimen Requirements
Required: Serum or Urine
1 mL (pediatric: 0.2 mL) of serum or urine
Reference Intervals:
Serum: 280 – 295 Mosm/kg
Urine: 500-800 mOsm/kg
Day(s) Testing is Performed
Monday-Sunday
CPT Code
Urine: 83935
Serum: 83930