ICD-10 Code E23.3 – Hypothalamic dysfunction, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E23.3 – Hypothalamic dysfunction, not elsewhere classified
What it is
E23.3 identifies a disorder of hypothalamic function that is not classified elsewhere. Use it when documentation states hypothalamic dysfunction without a more specific endocrine or structural diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect hypothalamic control problems affecting appetite, temperature regulation, sleep, puberty, or pituitary signaling.
When to use this code
Use this code when the provider documents hypothalamic dysfunction, hypothalamic insufficiency, or similar nonspecific hypothalamic disorder. It also fits cases where the hypothalamus is implicated but no more specific ICD-10-CM diagnosis is recorded. If the record names an underlying cause or a different endocrine disorder, code that condition instead.
Do not use for
Do not use E23.3 for isolated pituitary disorders, diabetes insipidus, or other specific endocrine diagnoses unless the chart clearly links them to hypothalamic dysfunction. Check documentation if the term is vague.
Coding tip
Query for specificity when the note says “hypothalamic disorder” or “pituitary-hypothalamic dysfunction” without details.