Case Presentation: An 87-year-old female with stage 4 chronic kidney disease, hypertension, and heart failure presented with concern for acute kidney injury based on outpatient laboratory studies. She had sought prior care for worsening fatigue, lightheadedness, productive cough, and decreased urine output. Lab results revealed a creatinine of 4.4 mg/dL (baseline 1.7 mg/dL) and potassium [...]