2027 ICD-10-CM Diagnosis Code E26Hyperaldosteronism

ICD-10-CM Codes›E00–E89›E20-E35›E26

ICD-10-CM E26
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Hyperaldosteronism
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E26: its own notes plus those printed at block E20-E35 and Chapter 4. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block E20-E35 Disorders of other endocrine glands applies to 99 codes
From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Notes

General instructions on how these codes are used.

From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name E26, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and E26 is one of the conditions named.

  • G63 Polyneuropathy in diseases classified elsewhere
    endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34) names E20-E34, which includes this code

Notes 1

These notes mention E26.

  • Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases
    All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere. names E16-E31, which includes this code

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About E26Overview

What is the ICD-10 code for hyperaldosteronism?

E26 is the ICD-10-CM category for hyperaldosteronism, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can E26 be reported with N64.3?

Not as a rule. The Excludes1 note at block E20-E35, which applies to E26, lists "galactorrhea (N64.3)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).