ICD-10 Code E23.2 – Diabetes insipidus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E23.2 – Diabetes insipidus
What it is
Diabetes insipidus is a disorder of water balance caused by insufficient antidiuretic hormone effect. It leads to inability to concentrate urine and excessive free-water loss.
Clinical signs
Common findings include polyuria and polydipsia, often with dilute urine. Clinical features vary; refer to documentation for whether the condition is central, nephrogenic, or related to another cause.
When to use this code
Use E23.2 when the provider documents diabetes insipidus, including central or pituitary-related forms. It is also appropriate when the record clearly identifies the condition without another more specific code.
Code it from the clinician’s diagnosis, problem list, or assessment when the chart supports ongoing management or evaluation. Check documentation if the note only mentions thirst or frequent urination without confirming diabetes insipidus.
Do not use for
Do not use this code for diabetes mellitus, psychogenic polydipsia, or nonspecific urinary frequency. If the documentation does not confirm diabetes insipidus, check documentation before assigning E23.2.
Coding tip
Look for the exact provider wording and any stated cause, because documentation may support a more specific pituitary or endocrine diagnosis.