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Osmolality, Plasma, Serum, or Urine
Test Code879
CPT Codes
83930-Plasma or serum; 83935-Urine
Preferred Specimen
Submit only 1 of the following specimens:
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s)
Specimen Volume: 10 mL from a random urine collection
Collection Instructions: No preservative.
Note: 1. Indicate urine on request form. 2. Label specimen appropriately (urine).
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s)
Specimen Volume: 10 mL from a random urine collection
Collection Instructions: No preservative.
Note: 1. Indicate urine on request form. 2. Label specimen appropriately (urine).
Instructions
Specimen must be tested within 24 hours of draw if container has remained closed or capped.
Transport Temperature
Refrigerate <=24 hours
Methodology
Freezing Point Depression
Setup Schedule
Monday through Sunday
Reference Range
PLASMA OR SERUM
275-295 mOsm/kg
URINE
250-900 mOsm/kg
275-295 mOsm/kg
URINE
250-900 mOsm/kg
Performed By
CoxHealth
