Delirium due to disease classified elsewhere

Essential (Required) Features:

• All diagnostic requirements for Delirium are met.
• There is evidence from the history, physical examination, or laboratory findings that the neurocognitive disturbance is caused by the direct physiological consequences of a medical condition. This judgment depends on establishing that:
• The medical condition is known to be capable of producing Delirium; and
• The course of the Delirium (e.g., onset, trajectory of symptoms, response to treatment) is consistent with causation by the medical condition.

Note: When Delirium is due to a disease or condition classified elsewhere, the diagnostic code corresponding to that disease or condition should be assigned along with Delirium Due to Disease Classified Elsewhere. If the Delirium is attributed to multiple medical conditions or to a medical condition and a substance or medication, the category Delirium Due to Multiple Etiological Factors should be used instead. This may include medications being used to manage the medical condition.

Potentially Explanatory Medical Conditions (examples):

• Certain Infectious or Parasitic Diseases (e.g., meningitis, viral hepatitis, sepsis)
• Diseases of Liver (e.g., chronic hepatic failure, hepatic encephalopathy)
• Diseases of the Circulatory System (e.g., acute myocardial infarction)
• Diseases of the Nervous System (e.g., cerebral ischaemic stroke, epilepsy or seizures, hypertensive encephalopathy)
• Diseases of the Urinary System (e.g., kidney failure, urinary tract infection)
• Endocrine Disorders (e.g., diabetic ketoacidosis, hyperthyroidism, hypothyroidism)
• Metabolic Disorders (e.g., acidosis, disorders or urea cycle metabolism, hypoglycaemia, hypomagnesaemia, hypo-osmolality or hyponatraemia)
• Neoplasms of the brain or central nervous system
• Nutritional Disorders (e.g., vitamin B1, B3 or B12 deficiency)