Cushing's syndrome (E24) ICD-10-CM
The E24 code range covers cushing's syndrome with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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.
- congenital adrenal hyperplasia E25.0
Codes in the E24 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the E24 range.
Adrenocortical Hyperfunction
Excess production of ADRENAL CORTEX HORMONES such as ALDOSTERONE; HYDROCORTISONE; DEHYDROEPIANDROSTERONE; and/or ANDROSTENEDIONE. Hyperadrenal syndromes include CUSHING SYNDROME; HYPERALDOSTERONISM; and VIRILISM.
Nelson Syndrome
A syndrome characterized by HYPERPIGMENTATION, enlarging pituitary mass, visual defects secondary to compression of the OPTIC CHIASM, and elevated serum ACTH. It is caused by the expansion of an underlying ACTH-SECRETING PITUITARY ADENOMA that grows in the absence of feedback inhibition by adrenal CORTICOSTEROIDS, usually after ADRENALECTOMY.
About the E24 Code Range
The ICD-10 code for Cushing's syndrome is grouped under the category E24, which captures various forms of this hormonal disorder caused by excessive cortisol. These codes help specify the origin and cause, such as pituitary tumors, drug effects, or ectopic hormone production.
This section includes E24.0 for pituitary-dependent Cushing's disease, also known as ACTH-dependent Cushing's syndrome or hypercortisolism due to pituitary adenoma. E24.1 covers Nelson's syndrome, another ACTH-related disorder. E24.2 describes drug-induced or iatrogenic Cushing's syndrome, often from corticosteroid use. E24.3 applies to ectopic ACTH secretion from non-pituitary tumors, while E24.4 identifies alcohol-induced pseudo-Cushing's syndrome. Other variations, including idiopathic or cyclic forms, are classified under E24.8. When the exact cause or type is unclear, E24.9 captures unspecified Cushing's syndrome cases. These distinctions assist healthcare providers and coders in accurately documenting the specific type of Cushing's syndrome encountered in clinical practice.
Questions About This Page
How many billable codes are in the E24 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the E24 range classify?
The range classifies cushing's syndrome. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
