ICD-11 Codes
for BA04 - Secondary hypertension

Teodor Jurukovski January 1, 1970

Fact checked by: Teodor Jurukovski

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Understanding Secondary Hypertension (ICD-11 Code BA04)

Secondary hypertension, identified by the ICD-11 code BA04, refers to high blood pressure that arises as a consequence of another identifiable medical condition. This is distinct from primary hypertension (essential hypertension), which has no single known cause. Conditions affecting the kidneys, arteries, heart, or endocrine system are common culprits. Effective management of secondary hypertension involves addressing both the elevated blood pressure and its underlying cause, which can potentially lead to a cure or significant improvement.

Causes and Risk Factors for Secondary Hypertension

Numerous health conditions can lead to secondary hypertension. Key causes include various kidney diseases such as diabetic nephropathy, polycystic kidney disease, and glomerular disease. Endocrine disorders are also significant contributors, including Cushing syndrome, aldosteronism, pheochromocytoma, and thyroid issues. Other factors can include congenital conditions like coarctation of the aorta, sleep apnoea, obesity, and certain medications or substances. Identifying these underlying causes is crucial for effective treatment planning.

How Secondary Hypertension is Diagnosed

The diagnostic process for secondary hypertension typically begins with a thorough medical history and physical examination, looking for clinical clues that suggest an underlying cause. Specific indicators may include resistant hypertension (blood pressure not controlled by multiple medications), sudden onset of high blood pressure, hypertension in very young or old individuals, or the presence of specific symptoms related to potential underlying conditions. Investigations often involve blood tests, urine analysis, and imaging studies tailored to suspected causes, such as renal ultrasounds or hormone level assessments. The ICD-11 code for secondary hypertension is BA04.

Symptoms Associated with Secondary Hypertension

Often, secondary hypertension itself does not present with specific symptoms, much like primary hypertension. However, individuals may experience symptoms related to the underlying condition causing the high blood pressure. Signs that might suggest secondary hypertension include blood pressure readings that are very high (e.g., systolic over 180 mmHg or diastolic over 120 mmHg), or blood pressure that is resistant to standard medication. Other indicators can be the sudden onset of hypertension before age 30 or after age 55, a lack of family history of hypertension, or the absence of obesity.

Treatment and Management of Secondary Hypertension

The management of secondary hypertension focuses on two primary goals: controlling the elevated blood pressure and treating the specific underlying condition. Treatment strategies are highly individualised based on the identified cause. This may involve lifestyle modifications, medication to manage blood pressure, and specific therapies targeting the root medical issue. For example, treating a kidney disorder or an endocrine imbalance can often normalise blood pressure. The ICD-11 code BA04 is used for documentation and billing purposes related to this condition.