Assessing Serum Creatinine in Heart Failure Patient

A 70-year-old male patient is admitted to the hospital for heart failure management. His medical history includes chronic kidney disease and hypertension. The healthcare provider has ordered a serum creatinine test to assess renal function. The nurse notes the following previous laboratory values: Serum creatinine was reported as __________ mg/dL, where normal values typically range between 0.6 and 1.2 mg/dL. Given the patient's history, an elevated creatinine level is particularly concerning.