Disorders of other endocrine glands (E20-E35) ICD-10-CM
The E20–E35 section covers disorders of other endocrine glands with 125 ICD-10-CM diagnosis codes, of which 99 are billable in fiscal year 2027. The section is organized into the 15 code ranges listed below.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Code Ranges in This Section 15 ranges · 125 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the E20–E35 Code Range
These conditions involve the parathyroid, pituitary and adrenal glands, the ovaries and testes, the thymus, puberty, or several glands together.
The parathyroid categories distinguish low parathyroid hormone in E20 from overactivity and other disorders in E21. The pituitary categories separate overactivity in E22 from underactivity and other disorders in E23.
Adrenal-related categories distinguish Cushing's syndrome in E24, adrenogenital disorders in E25, excess aldosterone in E26, and other adrenal disorders in E27. The remaining categories separate ovarian and testicular dysfunction, puberty disorders, problems involving multiple glands, thymus diseases, other endocrine disorders, and endocrine gland disorders in diseases classified elsewhere.
Questions About This Page
How many codes are in the E20-E35 range?
The E20-E35 range contains 125 ICD-10-CM diagnosis codes in FY 2027. 99 of them are billable, and the rest are category headers that organize the section.
What conditions does E20-E35 cover?
The range covers disorders of other endocrine glands. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
