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ICD Hub / Diseases of the circulatory system (I00–I99) / BA04.1 - Isolated diastolic secondary hypertension
ICD-11

ICD-11 Codes
for BA04.1 - Isolated diastolic secondary hypertension
Teodor Jurukovski January 1, 1970
Fact checked by: Teodor Jurukovski
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Understanding Isolated Diastolic Secondary Hypertension (ICD-11 Code BA04.1)

Isolated diastolic secondary hypertension, identified by the ICD-11 code BA04.1, is a specific type of high blood pressure where only the diastolic (bottom) reading is elevated, while the systolic (top) reading remains within the normal range. This condition typically affects individuals under the age of 55. Unlike primary hypertension, secondary hypertension has an identifiable underlying cause, which may include various medical conditions or lifestyle factors. While often asymptomatic, isolated diastolic secondary hypertension can increase the risk of cardiovascular events over time.

Key Factors Contributing to Isolated Diastolic Secondary Hypertension

The precise causes of isolated diastolic secondary hypertension are not always fully understood, but several significant risk factors have been identified. These include:
  • Obesity or being overweight
  • Smoking
  • Obstructive sleep apnea
  • A diet high in salt
  • Insufficient physical activity
  • Excessive alcohol consumption
  • Lack of adequate sleep
  • Conditions such as diabetes
Identifying and managing these contributing factors is crucial for individuals diagnosed with this condition.

How Isolated Diastolic Secondary Hypertension is Diagnosed

Diagnosing isolated diastolic secondary hypertension (ICD-11 code BA04.1) relies on accurate blood pressure measurements. Healthcare providers typically diagnose the condition when diastolic blood pressure readings are consistently in the hypertensive range (e.g., 80 mmHg or higher) on at least two separate occasions, while systolic blood pressure readings remain normal (e.g., below 130 mmHg). Further assessment may involve ambulatory blood pressure monitoring (ABPM) or home blood pressure monitoring to gain a comprehensive understanding of blood pressure fluctuations throughout the day and night.

Managing Isolated Diastolic Secondary Hypertension

The management of isolated diastolic secondary hypertension (ICD-11 code BA04.1) often begins with lifestyle modifications. These can include adopting a heart-healthy diet, such as the Mediterranean or DASH diet, maintaining a healthy body weight, engaging in regular aerobic exercise, ceasing smoking, and moderating alcohol intake. For some individuals, particularly if diastolic blood pressure remains persistently high or if other cardiovascular risk factors are present, antihypertensive medication may be prescribed. Treatment plans are tailored to the individual's specific health profile and risk factors.

Alternative Names for Isolated Diastolic Secondary Hypertension

Isolated diastolic secondary hypertension, coded under ICD-11 BA04.1, is also referred to by several other terms. Common clinical synonyms include "secondary isolated diastolic hypertension." Patient-friendly descriptions may refer to it as "high bottom blood pressure with normal top blood pressure" when secondary causes are identified.

When to Seek Medical Advice

Individuals experiencing elevated blood pressure readings, particularly a consistently high diastolic number with a normal systolic number, should consult a healthcare professional for accurate diagnosis and management. Prompt medical attention is also advised if experiencing symptoms such as severe headaches, nosebleeds, or shortness of breath, which could indicate a hypertensive emergency. Regular check-ups are essential for monitoring blood pressure and addressing any underlying causes associated with secondary hypertension.

Frequently asked questions

What is the ICD-11 classification meaning of Isolated diastolic secondary hypertension?
Isolated diastolic secondary hypertension refers to a condition where high blood pressure is caused by another identifiable medical condition, and specifically involves elevated diastolic blood pressure with normal systolic blood pressure.
What is the ICD-11 code for Isolated diastolic secondary hypertension?
The ICD-11 code for Isolated diastolic secondary hypertension is BA04.1.
How is the underlying cause of Isolated diastolic secondary hypertension specified in ICD-11?
ICD-11 allows for post-coordination to specify the underlying condition causing secondary hypertension. For Isolated diastolic secondary hypertension (BA04.1), additional codes can be linked to indicate the specific etiology.
How does Isolated diastolic secondary hypertension differ from other types of secondary hypertension in ICD-11?
In ICD-11, 'Isolated diastolic secondary hypertension' (BA04.1) is distinguished from 'Combined diastolic and systolic secondary hypertension' (BA04.0) and 'Isolated systolic secondary hypertension' (BA04.2) based on which blood pressure components are elevated.
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