Inclusion Criteria:  Adult patients ≥ 18 years of age with chronic kidney disease and hyperkalemia Chronic kidney disease is defined as eGFR 15-44ml/min/1.73m2 Documented hyperkalemia which is defined as serum potassium ≥ 5.0 mmol/L during the last 90 days Diet evaluation for hyperkalemia (serum potassium ≥ 5.0) during the last 90 days Patients receiving RASS inhibitors, beta-blockers, or diuretics to be on stable doses for 2 weeks  Exclusion Criteria:  Patients with a known allergy to patiromer Patients currently taking patiromer or other potassium controlling agents.