Patient presents with signs and symptoms suggestive of hyperkalemia, elevated potassium levels.  Presenting complaints may include muscle weakness, fatigue, nausea, palpitations, or in severe cases, cardiac arrhythmias or paralysis.  On physical examination, findings may be unremarkable or may include bradycardia, irregular pulse, or decreased deep tendon reflexes.  Electrocardiogram findings may reveal peaked T waves, prolonged PR interval, widened QRS complex, or sine wave pattern, indicative of potential cardiac effects of potassium elevation.  Laboratory results confirm hyperkalemia, with serum potassium exceeding the normal range.  Differential diagnosis includes pseudohyperkalemia, hemolysis, and laboratory error.  Initial management focuses on stabilizing cardiac membranes with calcium gluconate or calcium chloride if ECG changes are present.  Strategies to shift potassium intracellularly include insulin with glucose, albuterol nebulizer treatments, or sodium bicarbonate.  Removal of excess potassium may be achieved with diuretics, cation exchange resins such as sodium polystyrene sulfonate, or hemodialysis in cases of severe or refractory hyperkalemia.  Etiology of hyperkalemia is being investigated and may include renal insufficiency, acute kidney injury, medications such as ACE inhibitors or potassium-sparing diuretics, adrenal insufficiency, or metabolic acidosis.  Patient education provided on potassium-restricted diet, medication management, and the importance of follow-up care.  Further evaluation may include assessment of renal function, endocrine function, and review of current medications.  ICD-10 code E87.5, hyperkalemia, is documented.