How Do You Code Uncontrolled Hypertension?

How Do You Code Uncontrolled Hypertension? I10 Hypertension (benign, essential, primary) I11 Hypertensive heart disease. I12 Hypertension and chronic kidney disease. I13 Hypertensive heart and chronic kidney disease. What is the diagnosis code for uncontrolled hypertension? uncontrolled hypertension. Code I10 for HTN is assigned when HTN is described as essential, benign or malignant as well