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23038 Sodium

Sodium
Test Code: NA
Synonyms/Keywords
Na, Serum​
Useful For
Sodium measurements are used in the diagnosis and treatment of aldosteronism (excessive secretion of hormone aldosterone), diabetes insipidus, adrenal hypertension, Addison's disease, dehydration, inappropriate antidiuretic hormone secretion, or other diseases involving electrolyte imbalance.​
Specimen Requirements
Fasting Required Specimen Type
 Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No ​ Plasma​/Serum Lithium-heparin Plasma Separator (PST)​, Serum Separator Tube (SST) Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT) 1 mL​ 0.3 mL​ 0.6 mL whole blood​​
Specimen Stability Information
Specimen Type Temperature Time
Plasma/Serum​ ​ ​ Ambient​ 5 days​
Refrigerate​ 7 days​
Frozen 1 year​
Rejection Criteria
Collections with potassium oxalate/sodium fluoride
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Chippewa Falls ​Monday through Friday ​Less than 2 hours​ ISE/Beckman AU
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
​Ladysmith
 ​Monday through Sunday ​Less than 2 hours​ ISE/Beckman AU
Rice Lake
 ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
Marshfield​ Monday through Sunday​ Less than 2 hours​ ISE/Beckman AU
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
Neillsville​​Monday through Sunday​​Less than 2 hours​​ISE/Beckman AU
​Stevens Point ​Monday through Friday ​Less than 2 hours​ ​ISE/Beckman AU​
​Wisconsin Rapids ​Monday through Friday ​Less than 2 hours​ ​ISE/Siemens Dimension
Reference Range Information
Performing Location Reference Range
All Performing Sites 133-144 mmol/L​
​​​ ​See Critical Value List for list of current critical values​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84295 ​ ​ ​1
 ​ ​
Synonyms/Keywords
Na, Serum​
Ordering Applications

Ordering Application Description
​Cerner
 ​Sodium Level

If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type
 Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No ​ Plasma​/Serum Lithium-heparin Plasma Separator (PST)​, Serum Separator Tube (SST) Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT) 1 mL​ 0.3 mL​ 0.6 mL whole blood​​
Specimen Stability Information
Specimen Type Temperature Time
Plasma/Serum​ ​ ​ Ambient​ 5 days​
Refrigerate​ 7 days​
Frozen 1 year​
Rejection Criteria
Collections with potassium oxalate/sodium fluoride
Useful For
Sodium measurements are used in the diagnosis and treatment of aldosteronism (excessive secretion of hormone aldosterone), diabetes insipidus, adrenal hypertension, Addison's disease, dehydration, inappropriate antidiuretic hormone secretion, or other diseases involving electrolyte imbalance.​
Reference Range Information
Performing Location Reference Range
All Performing Sites 133-144 mmol/L​
​​​ ​See Critical Value List for list of current critical values​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Chippewa Falls ​Monday through Friday ​Less than 2 hours​ ISE/Beckman AU
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
​Ladysmith
 ​Monday through Sunday ​Less than 2 hours​ ISE/Beckman AU
Rice Lake
 ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
Marshfield​ Monday through Sunday​ Less than 2 hours​ ISE/Beckman AU
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ISE/Beckman AU
Neillsville​​Monday through Sunday​​Less than 2 hours​​ISE/Beckman AU
​Stevens Point ​Monday through Friday ​Less than 2 hours​ ​ISE/Beckman AU​
​Wisconsin Rapids ​Monday through Friday ​Less than 2 hours​ ​ISE/Siemens Dimension
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84295 ​ ​ ​1
 ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.