| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Osmolality, Plasma, Serum, or Urine
Test CodeOSM
Alias/See Also
Serum Osmolality
Plasma Osmolality
Urine Osmolality
Plasma Osmolality
Urine Osmolality
CPT Codes
83930 serum, 83935 urine
Preferred Specimen
Submit only 1 of the following specimens: Plasma
Draw blood in a green-top (lithium heparin) tube. Spin specimen down and send 1 mL of plasma.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Draw blood in a plain, red-top tube. Spin specimen down and send 1 mL of serum.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Urine
1 mL from a 24-hour or random urine collection. No preservative. Follow instructions in Urine Collections in Special Instructions.
Note: 1. Starting and ending times of collection are required.
2. Indicate urine.
3. Label specimen appropriately (urine).
Draw blood in a green-top (lithium heparin) tube. Spin specimen down and send 1 mL of plasma.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Draw blood in a plain, red-top tube. Spin specimen down and send 1 mL of serum.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Urine
1 mL from a 24-hour or random urine collection. No preservative. Follow instructions in Urine Collections in Special Instructions.
Note: 1. Starting and ending times of collection are required.
2. Indicate urine.
3. Label specimen appropriately (urine).
Instructions
Transport Temperature
Refrigerate
Methodology
Freezing Point Depression
Setup Schedule
Monday through Sunday
Reference Range
PLASMA OR SERUM
275-295 mosmol/kg
RANDOM URINE
50-1,400 mosmol/kg
24-HOUR URINE
300-900 mosmol/kg
Performed By
North Mississippi Medical Center Pathology Department
Performing Laboratory
NMMC Pathology Department
