ICD-10 Code E26.9 – Hyperaldosteronism, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E26.9 – Hyperaldosteronism, unspecified
What it is
E26.9 identifies hyperaldosteronism when the record does not specify the cause or type. It indicates excess aldosterone production or effect, but the documentation is not detailed enough for a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include hypertension, possible low potassium, muscle weakness, or metabolic alkalosis, but you should code only what is clearly supported in the record.
When to use this code
Use E26.9 when the provider documents hyperaldosteronism without stating primary, secondary, or another specific subtype. It also fits when the chart confirms the diagnosis but does not identify an underlying cause. If laterality, cause, or subtype is documented, check for a more specific code.
Do not use for
Do not use this code for documented primary or secondary hyperaldosteronism, or for adrenal disorders coded elsewhere. If the note only mentions abnormal aldosterone testing without a diagnosis, check documentation.
Coding tip
Code the documented subtype whenever possible; use E26.9 only when the record truly remains unspecified.