ICD-10 Code E26.1 – Secondary hyperaldosteronism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E26.1 – Secondary hyperaldosteronism
What it is
Secondary hyperaldosteronism means excess aldosterone production driven by another condition, rather than a primary adrenal disorder. It is used when documentation shows aldosterone excess linked to an underlying cause.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include hypertension, fluid retention, and evidence of a condition that stimulates the renin-angiotensin system.
When to use this code
Use E26.1 when the provider documents secondary hyperaldosteronism or clearly states aldosterone excess due to another cause. It may appear with conditions such as renal artery narrowing, heart failure, or other renin-driven states if documented.
Code it only when the diagnosis is established in the record, not when it is merely being considered. If the note only mentions elevated aldosterone without a secondary cause, check documentation.
Do not use for
Do not use this code for primary hyperaldosteronism, adrenal adenoma, or nonspecific hypertension without documented aldosterone excess. Check documentation if the cause is unclear.
Coding tip
Look for an explicit link between aldosterone excess and an underlying condition before assigning E26.1.