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Labcorp Oklahoma, Inc.
Test Directory


Index:

Sodium Urine Timed

Order Name SODIUM TMU
Test Number: 3003075
Revision Date 06/04/2021
Test Name Methodology LOINC Code
Total Urine Volume
3167-4 
Creatinine, Urine, mg/dL
Kinetic Alkaline Picrate (Jaffe) 20624-3 
Creatinine, Urine, 24 Hour
2162-6 
Creatinine Urine Timed Estimated
 
Sodium Urine mm/L
Ion-Selective Electrode 21525-1 
Sodium 24 Hour Urine
2956-1 
Sodium Urine Timed Estimated
 
Hours Collected - Prompt
30211-7 
Volume 24 Urine Prompt
 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Urine, 24-hour 24 hour Urine Container Refrigerated
Instructions Timed urine collection. No preservative. Record number of hours and volume in ml on the specimen container. Keep refrigerated.
Specimen stability: Ambient 1 days, Refrigerated 6 days, Frozen 6 months
GENERAL INFORMATION
Testing Schedule Mon - Fri 
Expected TAT 1-2 days  
Clinical Use Used to evaluate electrolyte balance, acute renal failure, acute oliguria and differential diagnosis of hyponatremia. 
CPT Code(s) 84300 (81050 if urine measured by RML)
Lab Section Chemistry