NPI Atlas

E23 – Hypofunction and other disorders of the pituitary gland

ICD-10-CM 2027 diagnosis code · Disorders of other endocrine glands

Non-billable header

ICD-10-CM code E23

Code: E23 (claims format: E23)
Description: Hypofunction and other disorders of the pituitary gland
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 4. Endocrine, nutritional and metabolic diseases (E00-E89)
Block: E20-E35 Disorders of other endocrine glands

Billable codes under E23

E23 is a header code and cannot be used on claims. Choose the most specific code:

E23.0 – HypopituitarismBillable
E23.1 – Drug-induced hypopituitarismBillable
E23.2 – Diabetes insipidusBillable
E23.3 – Hypothalamic dysfunction, not elsewhere classifiedBillable
E23.6 – Other disorders of pituitary glandBillable
E23.7 – Disorder of pituitary gland, unspecifiedBillable

Notes for E23

Includes:

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

Excludes1 (not coded here):

postprocedural hypopituitarism (E89.3)
short stature due to endocrine disorder (E34.3-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block E20-E35

Excludes1 (not coded here):

galactorrhea (N64.3)
gynecomastia (N62)

Frequently asked questions

What is ICD-10 code E23?

E23 is the ICD-10-CM code for hypofunction and other disorders of the pituitary gland, in the block E20-E35 (Disorders of other endocrine glands).

Is E23 a billable code?

No. E23 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.