ICD-10 Code E27.0 – Other adrenocortical overactivity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E27.0 – Other adrenocortical overactivity
What it is
E27.0 identifies excess activity of the adrenal cortex that does not fit a more specific adrenal disorder. It is used when documentation supports adrenocortical overactivity, but the exact cause is not stated.
Clinical signs
Clinical features vary; refer to documentation. Patients may show signs consistent with adrenal hormone excess, such as Cushingoid appearance or other endocrine findings, but the chart must support the diagnosis.
When to use this code
Use E27.0 when the provider documents other adrenocortical overactivity or a nonspecific adrenal cortical hyperfunction. It may apply when the record confirms adrenal overactivity without naming a more specific disorder. Check documentation if the note instead describes a distinct endocrine syndrome.
Do not use for
Do not use this code for congenital adrenal hyperplasia, adrenal insufficiency, or a clearly documented specific Cushing syndrome. If the diagnosis is better defined elsewhere, code that condition instead.
Coding tip
Assign E27.0 only when the provider explicitly documents adrenocortical overactivity and no more specific adrenal diagnosis is available.