CPT Code:


Test Type: 1.0 mL Serum Kit Based
Stability Time:

Refrigerated: 14 days

Reference Range:
  • Low: <3.5 mmol/L
  • Normal: 3.5-5.3 mmol/L
  • High: >5.3 mmol/L
  • Alert: ≤2.5 or ≥6.0 mmol/L


Potassium is an electrolyte vital to cell metabolism.

  • May be used to diagnose and evaluate hypertension, diabetic ketoacidosis, kidney disease, and to monitor patient receiving dialysis, diuretics, or IV therapy.
  • Elevated levels could indicate excessive potassium intake, kidney disease, diabetes, and dehydration.
  • Low levels of potassium could indicate dehydration or acetaminophen overdose.

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)