The nurse is reviewing the laboratory test results for a patient who has recently been diagnosed with hypertension. Which result is important to communicate to the health care provider?

Blood glucose level of 122 mg/dL (Normal 70-110 mg/dL)

Serum hemoglobin of 14.7 g/dL (Normal 12-18 g/dL)

Serum potassium of 4.5 mEq/L (Normal 3.5-5.0 mEq/L)

Serum creatinine of 2.8 mg/dL (normal 0.5-1.2 mg/dL)