ICD-10-CM 2027 diagnosis code
E23Hypofunction and other disorders of the pituitary gland
E23 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About E23
E23 is the ICD-10-CM diagnosis code for hypofunction and other disorders of the pituitary gland. It belongs to block E20-E35 (disorders of other endocrine glands) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: E23.0 (hypopituitarism), E23.1 (hypopituitarism), E23.2 (insipidus), E23.3 (classified), E23.6 (gland) and E23.7 (unspecified).
Don't report E23 together with the conditions in its Excludes1 note: postprocedural hypopituitarism (E89.3) and short stature due to endocrine disorder (E34.3-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under E23
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to E23.
Broader instructions also apply from E20-E35 Disorders of other endocrine glands and Chapter 4: Endocrine, nutritional and metabolic diseases.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about E23
Is E23 billable?
- No. E23 is a header code. Report one of its more specific subcodes instead.