E23Header code — not billable

Hypofunction and other disorders of the pituitary gland

Chapter
4. Endocrine, nutritional and metabolic diseases
Category
E23
Effective date
October 1, 2026

Related codes in category E23

E23.0HypopituitarismYesE23.1Drug-induced hypopituitarismYesE23.2Diabetes insipidusYesE23.3Hypothalamic dysfunction, not elsewhere classifiedYesE23.6Other disorders of pituitary glandYesE23.7Disorder of pituitary gland, unspecifiedYes

Frequently asked questions

What is ICD-10 code E23?

E23 is an ICD-10-CM diagnosis code for Hypofunction and other disorders of the pituitary gland.

Is E23 a billable code?

No. E23 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is E23 in?

E23 falls under Chapter 4: Endocrine, nutritional and metabolic diseases.

When did E23 become effective?

E23 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to E23?

E23 belongs to category E23, which includes 6 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.