CPT Code


Specimen Type


Container Type

Sterile Specimen Container


Room Temperature: 45 days; 2-8°C, 45 days; -20°C, 1 year

Handling Instructions

Collect in Sterile Specimen Container, No Preservatives

Clinical Notes

The sodium content in the urine is a balance between dietary sodium (intake) and the renal excretion of sodium. Urine sodium levels are typically tested in patients who have abnormal blood sodium levels to help distinguish the cause, or to diagnose/monitor renal function/disease.

Performing Lab

Principle Laboratory - Dallas
6210 N Belt Line Rd
Irving, TX 75063

Principle Laboratory - Houston
16840 Buccaneer Ln
Suite 281
Houston, TX 77058