2026 ICD-10-CM Diagnosis Code E26Hyperaldosteronism

ICD-10-CM Codes›E00–E89›E20-E35›E26

ICD-10-CM E26
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E26 is a non-billable ICD-10-CM category code for hyperaldosteronism, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E26.01, E26.02, E26.09, and E26.1.

Code Identity

ICD-10-CM Code
E26
Billable Status
No — Non-Billable Category
Code Describes
Hyperaldosteronism
Chapter
E20-E35
Disorders of other endocrine glands

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE20-E35Disorders of other endocrine glands
CategoryE26Hyperaldosteronism
This CodeE26Hyperaldosteronism

Specific Coding for HyperaldosteronismOverview

Non-specific codes like E26 require more characters. Use one of these billable codes instead:

  • E26.0 for Primary hyperaldosteronism

  • Use E26.01 for Conn's syndrome

  • Use E26.02 for Glucocorticoid-remediable aldosteronism

  • Use E26.09 for Other primary hyperaldosteronism

  • Use E26.1 for Secondary hyperaldosteronism

  • E26.8 for Other hyperaldosteronism

  • Use E26.81 for Bartter's syndrome

  • Use E26.89 for Other hyperaldosteronism

  • Use E26.9 for Hyperaldosteronism, unspecified

Clinical InformationClinical

  • Hyperaldosteronism

    a condition caused by the overproduction of aldosterone. it is characterized by sodium retention and potassium excretion with resultant hypertension and hypokalemia.

Patient EducationClinical

Adrenal Gland Disorders

Your adrenal glands are two small organs that sit on top of each kidney. The adrenal glands make different types of hormones you need to stay alive and healthy. Hormones are chemicals that travel in your bloodstream and control how different parts of your body work.

The full article covers:

  • What are adrenal glands?
  • What are adrenal gland disorders?
  • What causes adrenal gland disorders?
  • How are adrenal gland disorders diagnosed?
  • What are the treatments for adrenal gland disorders?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E26Overview

Is E26 (Hyperaldosteronism) a billable code?

No. This is a category header that groups the codes for hyperaldosteronism, and headers cannot be submitted on claims. Claims for hyperaldosteronism need a more specific code from this category, such as E26.01, E26.02, and E26.09.