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Test Code 730 Sodium Urine, Timed

Additional Codes


PowerChart: Sodium Urine Timed

Epic: LAB446 Sodium, Urine, 24 Hour

MA Cerner: Urine Sodium Timed.

Test Method

UCL: Ion Selective Electrode Potentiometry; Beckman DXC600/DXC880i

MA: Indirect Sample Sensing with IMT; Siemens Xpand

Specimen Requirement

0.5 mL urine is required.

Additional Specimen Collection Information

Collect a timed urine specimen, 24 hour preferred. No preservative is required. Label the specimen appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include date and time of collection. Indicate the time period of collection on the container. Submit entire specimen for analysis. Store the urine specimen refrigerated and transport to the lab within 48 hours.


Testing is performed Monday through Sunday.

Typically assayed within 2 hours after the specimen arrives at the testing site.

Reference Values

43-217 meq/24 hours

  • Timed urine collection are reported in meq/24 Hours regardless of collection time.

CPT Code Information

82436 Chemistry: Sodium, urine

Useful For

Assessing acid-base balance, water balance, water intoxication, and dehydration

LOINC Code Information

2956-1 Sodium [Moles/Time] In 24 Hour Urine