E22Header code — not billable

Hyperfunction of pituitary gland

Chapter
4. Endocrine, nutritional and metabolic diseases
Category
E22
Effective date
October 1, 2026

Related codes in category E22

E22.0Acromegaly and pituitary gigantismYesE22.1HyperprolactinemiaYesE22.2Syndrome of inappropriate secretion of antidiuretic hormoneYesE22.8Other hyperfunction of pituitary glandYesE22.9Hyperfunction of pituitary gland, unspecifiedYes

Frequently asked questions

What is ICD-10 code E22?

E22 is an ICD-10-CM diagnosis code for Hyperfunction of pituitary gland.

Is E22 a billable code?

No. E22 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 E22 in?

E22 falls under Chapter 4: Endocrine, nutritional and metabolic diseases.

When did E22 become effective?

E22 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to E22?

E22 belongs to category E22, which includes 5 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.