2026 ICD-10-CM Diagnosis Code E23Hypofunction and other disorders of the pituitary gland

ICD-10-CM Codes›E00–E89›E20-E35›E23

ICD-10-CM E23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E23 is a non-billable ICD-10-CM category code for hypofunction and other disorders of the pituitary gland, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E23.0, E23.1, E23.2, and E23.3.

Code Identity

ICD-10-CM Code
E23
Billable Status
No — Non-Billable Category
Code Describes
Hypofunction and other disorders of the pituitary gland
Chapter
E20-E35
Disorders of other endocrine glands

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE20-E35Disorders of other endocrine glands
CategoryE23Hypofunction and other disorders of the pituitary gland
This CodeE23Hypofunction and other disorders of the pituitary gland

Specific Coding for Hypofunction and other disorders of the pituitary glandOverview

Non-specific codes like E23 require more characters. Use one of these billable codes instead:

  • Use E23.0 for Hypopituitarism

  • Use E23.1 for Drug-induced hypopituitarism

  • Use E23.2 for Diabetes insipidus

  • Use E23.3 for Hypothalamic dysfunction, not elsewhere classified

  • Use E23.6 for Other disorders of pituitary gland

  • Use E23.7 for Disorder of pituitary gland, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • the listed conditions whether the disorder is in the pituitary or the hypothalamus

Type 1 Excludes

  • postprocedural hypopituitarism E89.3
  • short stature due to endocrine disorder E34.3

Patient EducationClinical

Pituitary Disorders

Your pituitary gland is a pea-sized gland at the base of your brain. The pituitary is the "master control gland" - it makes hormones that affect growth and the functions of other glands in the body.

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 E23Overview

Is E23 (Hypofunction and other disorders of the pituitary gland) a billable code?

No. This is a category header that groups the codes for hypofunction and other disorders of the pituitary gland, and headers cannot be submitted on claims. Claims for hypofunction and other disorders of the pituitary gland need a more specific code from this category, such as E23.0, E23.1, and E23.2.