ICD-10 Code E26.0 – Primary hyperaldosteronism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E26.0 – Primary hyperaldosteronism
What it is
Primary hyperaldosteronism is excess aldosterone production from the adrenal glands. It is a cause of secondary hypertension and may occur with or without low potassium.
Clinical signs
Typical findings include hypertension that may be difficult to control, suppressed renin, and evidence of aldosterone excess. Clinical features vary; refer to documentation.
When to use this code
Use E26.0 when the provider documents primary hyperaldosteronism, including Conn syndrome or aldosterone-producing adrenal disease. Code it when the diagnosis is confirmed or clearly stated in the record. Check documentation if the chart only notes suspected aldosteronism.
Do not use for
Do not use this code for secondary hyperaldosteronism or other adrenal disorders without primary aldosterone excess. If the diagnosis is uncertain or not documented, check documentation.
Coding tip
Confirm that the record identifies the condition as primary, not secondary, before assigning E26.0.