What ICD-10 Codes are Used for Hypertension
Hypertension, also known as high blood pressure, is a common condition that can lead to serious health complications if left untreated. Healthcare professionals need to code this condition for billing and medical records accurately. Here are some commonly used ICD-10 codes for hypertension:
- I10 - Essential (primary) hypertension: This code is assigned when a patient is diagnosed with high blood pressure without any identifiable cause. It's often linked to contributing factors such as genetics, age, or lifestyle habits like poor diet, lack of exercise, and tobacco use.
- I11 - Hypertensive heart disease: This category is used when a patient has hypertension and heart disease. It indicates that the patient's heart condition is directly related to their high blood pressure. This could encompass a range of heart conditions, including coronary artery disease, heart failure, or left ventricular hypertrophy.
- I12 - Hypertensive chronic kidney disease: This code is applied when a patient's kidney disease is caused or significantly exacerbated by hypertension. Chronic kidney disease associated with hypertension can lead to complications like renal failure if not treated effectively.
- I13 - Hypertensive heart and chronic kidney disease: This code is used when a patient suffers from both heart and kidney disease due to hypertension. It signifies a systemic impact of high blood pressure affecting multiple organ systems.
- I15 - Secondary hypertension: This code is used when a patient's high blood pressure results from another underlying medical condition. This could include hormonal disorders, kidney disease, certain medications, or congenital heart defects.
- I67.4 - Hypertensive encephalopathy: This code is used when a patient exhibits altered mental status, including confusion, seizures, and coma, due to high blood pressure. It is a serious condition that requires immediate medical intervention.
Remember, using the correct ICD-10 code to ensure accurate billing and tracking of patient health outcomes is important. To better understand how these codes are applied, check out this helpful explainer video below:

