CPT Code:


Test Type: 1.0 mL Serum Kit Based
Stability Time:

Refrigerated: 14 days


Reference Range:
  • Low: <135 mmol/L
  • Normal: 135-146 mmol/L
  • High: >146 mmol/L
  • Alert: ≤120 or ≥160 mmol/L


Sodium is an electrolyte present in all body fluids and is vital to normal body function, including nerve and muscle function. It helps cells function normally and helps regulate the amount of fluid in the body.

  • May be used to detect the cause and help monitor treatment plan for patients with abnormal levels.
  • Elevated levels of sodium could indicate hypernatremia or dehydration.
  • Low levels could indicate hyponatremia, fluid retention or too much water intake.

Methodology - Ion Selective Electrode (ISE)

Collection Details:

Collection Instructions:

1.0 mL serum (0.5 mL minimum) collected in serum separator tube (SST/Tiger Top)