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St. John Health System
Lab Catalog


Index:

Sodium

Order Name SODIUM
Test Number: 2005000
Revision Date 06/04/2021
Test Name Methodology LOINC Code
Sodium
Ion-Selective Electrode 2951-2 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Alternate 1 1 mL (0.5) Serum Clot Activator SST Refrigerated
Instructions Specimen Stability: Ambient 2 weeks, Refrigerated 2 weeks, Frozen 1 year
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1-2 days  
Clinical Use Useful in monitoring metabolic processes, pituitary function, adrenal function, hydration, proper body pH and regulation of appropriate heart and muscle functions. 
CPT Code(s) 84295
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Chemistry